Home Cost Desk calculators are designed for planning, not contractor quotes. Each tool explains its formula, assumptions, exclusions, and the project details that can change the real-world result.
These planning tools are free to use, require no account or email signup, and are intended to help U.S. homeowners understand project scope before comparing local quotes. Organizations may link directly to the calculator hub or to a specific tool when it is useful to their audience.
Review how cost ranges and calculator assumptions are built in our Research Methodology and Sources Policy. Resource editors can send questions or corrections to info@homecostdesk.com.
Focused cost estimators
These focused tools live inside their related guides so the estimate stays next to the assumptions, source ranges, safety notes and repair-versus-replace context behind it.
- Home Improvement Project Budget Calculator — add direct work, removal, permits, repair allowances, delivery and your own contingency for projects without a dedicated tool.
- AC Repair Cost Estimator — compare common repair ranges and major-repair decisions.
- Whole-House Repipe Estimator — place a project within published planning bands using access, stories, bathrooms and material.
- Water Heater Replacement Estimator — compare tank, tankless and project-scope factors without invented add-ons.
- Bathroom CFM Calculator — size ventilation from bathroom area or fixtures using HVI guidance.
- Plumber Cost Estimator — compare service-call, hourly and common repair planning ranges.
- Sump Pump Cost Estimator — compare replacement, repair, new installation and backup scenarios.
- Dishwasher Installation Estimator — compare simple replacement with first-time installation scope.
- Prefab Home Total Move-In Cost Calculator — add land, site work, foundation, delivery, setup and utilities to a modular or manufactured home price. See the Prefab Homes guide hub for the related cost guides.
Methodology: each estimator uses ranges or rules already supported by its guide. Where a source does not provide a defensible dollar adjustment, the tool shows a scope warning instead of inventing a multiplier. See our Research Methodology.
Renovation Budget & Contractor Quote Comparison Workbook
Compare up to four contractor quotes, track allowances, change orders, payments, hidden costs and the final project budget in one Excel workbook.
See what is included →Purchase link will be added after checkout is finalized.What each calculator asks for
| Tool | Main inputs | What it returns |
|---|---|---|
| Room area | Room length and width | Square footage |
| Paint quantity | Paintable wall/ceiling area, coverage per gallon and number of coats | Estimated gallons needed |
| Flooring & waste | Measured floor area and waste percentage | Adjusted purchase area |
| Maintenance budget | Estimated home value | 1%, 2% and 3% annual and monthly reserve targets |
| Roof replacement | Roof size, material, pitch, complexity, tear-off and allowances | Installed planning range |
| HVAC replacement | System type and ductwork scenario | Installed planning range |
| Kitchen remodel | Kitchen area and remodel scope | Planning range |
| Bathroom remodel | Bathroom area and remodel scope | Planning range |
| Fence installation | Linear feet, material and removal choice | Planning range |
| Deck building | Deck area, material and elevation | Planning range |
Room Area Calculator
Enter length and width in feet. The calculator shows floor area only.
Area: — sq ft
Formula: length × width. Add project-specific waste separately.
Related guide: Home Renovation Budget 2026 explains how measured area fits into labor, materials, permits and contingency.
Paint Quantity Calculator
Estimate gallons from paintable wall area, coverage, and number of coats. Use the paint manufacturer's stated coverage for the product you plan to buy.
Estimated paint: — gallons
Formula: paintable area × coats ÷ stated coverage. Buy quantities are rounded up to the next tenth of a gallon for planning only.
Related guide: Interior Painting Cost 2026 covers labor, prep, room size and installed pricing.
Flooring Area & Waste Calculator
Estimate material quantity from measured floor area and a waste allowance you choose for the project.
Material to plan for: — sq ft
Formula: measured area × (1 + waste ÷ 100). The correct waste allowance depends on material, room shape, pattern, defects, and installer guidance.
Related guide: Flooring Installation Cost 2026 compares installed costs and the project variables behind a quote.
Annual Home Maintenance Budget Calculator
Enter an estimated home value to see the common 1%–3% annual maintenance-and-repair reserve framework, plus the equivalent monthly savings target. This is a reserve planning tool—not a prediction of what you will spend in a particular year.
Formula: home value × 1%–3% ÷ 12 for a monthly reserve target. See the Annual Home Maintenance Cost 2026 guide for assumptions, limitations and system-by-system planning.
Roof replacement planning estimate
Build a 2026 U.S. installed-cost range for a full roof replacement. This is a budgeting range, not a contractor quote.
Nothing is saved. Nothing is sent anywhere. Do not climb onto the roof to measure it.
Your planning estimate
Enter the roof size and choices, then calculate. You will get a low-to-high installed range, not a single quote.
Estimated installed range
Typical planning midpoint
Roof area used
Roofing squares
Material
Implied installed cost
Why this estimate moved
Possible costs not fully captured
How this estimate is calculated
Last pricing review: October 2026. Rates are national U.S. installed-cost bands for a full replacement, not material-only prices.
1. difficulty = pitch × complexity × stories, rounded to 3 decimals at each step, then clamped to 0.900–1.280. 2. multiplier = 1 + 0.5 × (difficulty − 1), with that half-step rounded to 3 decimals. 3. Roof amount = area × material rate × multiplier, rounded to the cent. Tear-off is not inside this step. 4. Tear-off amount = area × tear rate. One layer = $0. No tear-off = −$1.50 / sq. ft. Multiple layers = +$1.75 / sq. ft. 5. Decking amount = area × selected percent × $2.00, $3.50, or $5.00, rounded to the cent. Pitch does not multiply this. 6. Scenario amount = (roof + tear-off + decking) × 0.90, 1.00, or 1.15, rounded to the cent. 7. The screen rounds that result to the nearest $100.
The material rate already assumes a moderate pitch, an average roof, one story, and one layer of tear-off with disposal. Pitch, complexity, and stories move only half of the material amount, so the material is not marked up a second time. Tear-off and decking stay dollar add-ons. They are not multiplied by the difficulty factor.
Low uses the low material rate and the $2 decking rate. Mid uses the central rates and $3.50. High uses the high material rate and $5. Waste for an average roof is already inside the published installed prices. The simple and complex choices change the difficulty factor. They are not a second waste percentage.
Architectural asphalt is the clearest published disagreement. HomeGuide’s November 7, 2025 page, presented as a 2026 guide, shows about $4–$6 per square foot installed. Other 2026 summaries put architectural work nearer $5–$8. This calculator uses $4.50, $6.00, and $8.00. It does not use a single survey average as a rate.
Before requesting quotes
- Confirm the roof area with a contractor measurement, an aerial report, or plans. Do not climb a steep roof to get the number.
- Ask each roofer to price the same material class and the same tear-off scope.
- Ask how damaged decking is priced, per sheet or per square foot, and what happens if more of it is rotten.
- Confirm flashing, ventilation, underlayment, permits, disposal, cleanup, and the warranty in writing.
- Compare at least two or three written scopes. A lower price that leaves out tear-off is not a lower project.
Read the Home Cost Desk roof replacement cost guide. For metal, see the metal roof cost guide.
Safety
Roof work is a fall hazard. OSHA’s residential construction rule, 29 CFR 1926.501(b)(13), generally requires fall protection when workers are six feet or more above a lower level. This calculator does not tell you how to work at height. Measuring and replacing a roof is work for a qualified contractor. Licensing rules depend on the state and the city.
Questions homeowners ask
- How accurate is a roof replacement cost calculator?
- It can set a planning range. It cannot see your deck, your flashing, or your local crew’s schedule. A written quote is the price. This result is the budget you use before those quotes.
- How do I estimate roof size without climbing up?
- Use the ground footprint times a pitch factor, an aerial measurement, permit plans, or the contractor’s measure. Living area on a two-story house is not the roof area.
- Does roof pitch affect replacement cost?
- Yes. Steeper slopes take more labor and more fall protection. This tool applies that only to part of the installed price so the shingles or metal themselves are not increased by the full percentage.
- Does the calculator include tear-off?
- One existing layer, with disposal, is inside the base rate. Choose no tear-off or multiple layers if that is not your job.
- How much should I budget for roof decking repair?
- A common installed allowance is about $2 to $5 per square foot of the damaged area, not of the whole roof. Pick a percentage only as a contingency. The crew will not know the real share until the old roof is off.
- Is a contractor quote usually different from this range?
- Often, yes. Labor markets, access, code upgrades, permits, brand, and hidden repairs move the invoice. If every quote sits outside this range, compare the scopes before you assume the range is the error.
Sources
- HomeGuide, “How Much Does a Roof Replacement Cost? (2026),” updated November 7, 2025. Installed ranges by material, removal per square, and decking at $2–$5 per square foot. https://homeguide.com/costs/roof-replacement-cost
- This Old House, “New Roof Cost Guide (2026),” page shows Updated 06/05/2026. In the material table, the asphalt row shows $10,042 and $5.02 per square foot for 2,000 square feet: https://www.thisoldhouse.com/roofing/new-roof-cost . That average is not an input to this formula.
- Angi, “How Much Does a Shingle Roof Cost? [2026 Data].” National project average near $10,500. Used only as context: its per-square-foot table mixes material prices with project totals. https://www.angi.com/articles/how-much-does-shingle-roof-cost.htm
- Home Cost Desk, “Metal Roof Cost 2026,” for the metal bands and the decking note already published on this site. https://homecostdesk.com/roofing/metal-roof-cost-2026/
- OSHA, Fall Protection in Residential Construction, 29 CFR 1926.501(b)(13). Safety context only. Not a price source. https://www.osha.gov/residential-fall-protection/guidance
Illustrative check: 2,500 sq. ft. of architectural shingles, moderate pitch, average complexity, two stories, one tear-off layer, no decking allowance, national baseline scenario. The button below fills that case. The production result is $11,500–$20,500, midpoint about $15,400.
HVAC replacement planning estimate
Build a 2026 U.S. installed-cost range for a furnace, central air, a matched pair, a ducted heat pump, or one ductless zone. This is a budgeting range, not a load calculation and not a contractor quote.
Nothing is saved. Nothing is sent anywhere. Do not open a refrigerant circuit or a gas line to inspect the system.
Your planning estimate
Choose the system, then calculate. You will get a low-to-high installed range, not a single quote.
Estimated installed range
Typical planning midpoint
Why this estimate moved
Possible costs not fully captured
How this estimate is calculated
Last pricing review: October 2026. Figures are national installed project bands, not prices per square foot.
1. Start with the published project band for the system. Furnace only: $2,000 / $3,700 / $5,400. Central air only: $2,500 / $5,000 / $7,500. Furnace and central air: $5,000 / $8,000 / $11,000. Ducted heat pump: $3,800 / $6,000 / $8,200. One-zone ductless: $3,000 / $6,500 / $10,000. 2. If, and only if, the system is furnace-plus-air or a ducted heat pump, and you chose new ducts, add $2,000 / $3,500 / $5,000. 3. Multiply by 0.90, 1.00, or 1.15. Round to the cent, then to the nearest $100.
The $2,000 / $3,500 / $5,000 duct step is the difference between HomeGuide’s $5,000–$11,000 replacement and its $7,000–$16,000 “with ductwork” row. Midpoints are the average of the published ends, already on a hundred-dollar mark. Home size does not change the dollars.
Why these numbers can differ from the HVAC guide: this calculator deliberately uses HomeGuide’s system-specific project bands. The main HVAC guide also reports Angi’s broader $5,000–$12,500 overall replacement range and This Old House survey averages. Those figures describe different source samples and scopes, so they are shown as cross-checks rather than blended into one invented range.
Before requesting quotes
- Ask for a load calculation. Do not accept a system sized only from square footage.
- Ask whether the quote reuses the ducts or replaces them, and whether the thermostat, pad, and line set are included.
- Ask what electrical, gas, flue, or condensate work is extra.
- Compare at least two written scopes for the same efficiency range.
Related guide: HVAC Replacement Cost 2026 covers equipment, ductwork, efficiency, permits and quote comparisons. Browse all calculators.
Safety
Refrigerant, gas piping, flue venting, and household electrical work are not homeowner tasks. A heat pump or air conditioner has to be charged and recovered by someone allowed to handle refrigerant. This range is not a sizing method and not permission to open the equipment.
Questions homeowners ask
- Does this size the equipment?
- No. Square footage is not collected because a published project band is not a Manual J load. The contractor measures the house, the ducts, and the climate.
- Why doesn’t a larger house raise the number?
- HomeGuide’s main rows are project totals. Using them again as a price per square foot would count the same job twice.
- When are new ducts added?
- Only for a furnace-plus-air replacement or a ducted heat pump. The adder is $2,000, $3,500, and $5,000 on the low, mid, and high lines. Other system types leave that choice out of the math and say so.
- Is the midpoint a quote?
- No. It is the center of the published band after the scenario you picked. Brand, efficiency, access, and code work still move the invoice.
Sources
- HomeGuide, “How Much Does a New HVAC System Cost to Install or Replace? (2026),” written by Kristen Cramer, August 27, 2025. Furnace $2,000–$5,400, central air $2,500–$7,500, furnace plus air $5,000–$11,000, with ductwork $7,000–$16,000, heat pump $3,800–$8,200, ductless $3,000–$10,000. https://homeguide.com/costs/hvac-cost
Illustrative check: furnace and central air, existing ducts, national baseline. Production result: $5,000–$11,000, midpoint about $8,000.
Kitchen remodel planning estimate
Match your kitchen to a published HomeGuide size-and-scope row. The dollars do not come from square feet times a rate.
Nothing is saved. A layout that moves plumbing, gas, or bearing walls is a different kind of project from a finish refresh. This is not a design.
Your planning estimate
Enter the kitchen floor area and a scope, then calculate.
Estimated installed range
Typical planning midpoint
Why this estimate moved
Possible costs not fully captured
How this estimate is calculated
Last pricing review: October 2026. The price is a published project row. Square footage only chooses the row.
1. 70–100 sq. ft. is small. 101–200 is mid-size. 201–350 is large. 2. Minor small: $4,000 / $9,500 / $15,000. Minor mid-size: $6,000 / $15,500 / $25,000. Minor large: $13,000 / $31,500 / $50,000. Midrange mid-size only: $25,000 / $37,500 / $50,000. High-end small: $25,000 / $32,500 / $40,000. High-end mid-size: $50,000 / $62,500 / $75,000. High-end large: $75,000 / $87,500 / $100,000. 3. Multiply by 0.90, 1.00, or 1.15. Round to the cent, then to the nearest $100. Mids are the average of the published ends.
There is no extra cabinet percentage. The row already describes the scope. A missing row is an error, not a guessed cell.
Before requesting quotes
- Write down whether the cabinet boxes, the sink location, and the appliance locations stay.
- Ask each bidder to price the same appliance list and the same counter material.
- Ask what happens if a wall is opened and the wiring or plumbing is not what the plan assumed.
- Keep at least two written scopes. A lower bid that omits the counter or the electrician is not a lower kitchen.
Related guide: Kitchen Remodel Cost 2026 covers cabinets, counters, appliances, layout changes and hidden costs. Browse all calculators.
Safety
Gas ranges, electrical circuits, and plumbing moves belong in a permitted scope. This calculator does not tell you to open walls or to relocate a gas line. Lead paint and asbestos can show up in older kitchens; that work has its own rules and is not in the range.
Questions homeowners ask
- Why isn’t this price per square foot?
- The HomeGuide kitchen page used here publishes project totals by size and scope. Multiplying a borrowed per-square-foot rate on top of those totals would invent a second price.
- Why does midrange fail for a small kitchen?
- That cell is not in the source. The calculator stops instead of filling the gap.
- Does the range include appliances?
- The published rows are remodel totals, not a separate appliance allowance you can add again. Ask the contractor which appliances are in the bid.
- Can a real bid be higher?
- Yes. Layout changes, structural work, and custom cabinets can pass the high end, especially on a large high-end row that HomeGuide already marks with a plus.
Sources
- HomeGuide, “How Much Does It Cost to Redo a Kitchen? (2026),” written by Tara Farmer, July 1, 2024. Size-and-scope project rows used above, including minor small kitchens at $4,000–$15,000 and high-end large kitchens at $75,000–$100,000-plus. https://homeguide.com/costs/cost-to-redo-kitchen
Illustrative check: 150 sq. ft., midrange, national baseline. Production result: $25,000–$50,000, midpoint about $37,500.
Bathroom remodel planning estimate
Price a bathroom from HomeGuide’s size table, using one installed rate per scope. This is a planning range, not a fixture list.
Nothing is saved. Floor area is the bathroom floor, not the whole house. Do not open a wet wall to measure the pipes.
Your planning estimate
Enter the bathroom floor area and a scope, then calculate.
Estimated installed range
Typical planning midpoint
Why this estimate moved
Possible costs not fully captured
How this estimate is calculated
Last pricing review: October 2026. Rates are fitted to HomeGuide’s size table, then rounded to the nearest $100.
1. Minor: $100 / $130 / $150 per sq. ft. Partial: $150 / $220 / $300 per sq. ft. Full: $250 / $350 / $500 per sq. ft. 2. Amount = floor area × that rate, in cents, with no other multiplier. 3. Multiply by 0.90, 1.00, or 1.15. Round to the cent, then to the nearest $100.
Check against the source table: 50 sq. ft. partial is $7,500–$15,000. Full at 35 sq. ft. is $250 × 35 = $8,750, which rounds to $8,800, beside the table’s $8,800 low end, and $500 × 35 = $17,500, the table’s high end. A 50 sq. ft. full job is $12,500–$25,000 before a scenario.
Before requesting quotes
- Decide whether the toilet, sink, and shower stay in place. Put that in every bid.
- Ask how the shower is waterproofed, and who warranties that layer.
- Ask whether the fan vents outside, and whether the quote includes the fan.
- Compare two or three scopes that name the same fixtures.
Related guide: Bathroom Remodel Cost 2026 covers fixtures, waterproofing, plumbing changes, ventilation and installed pricing. Browse all calculators.
Safety
A bathroom remodel can open wiring and supply lines. This tool does not describe how to do that work. Waterproofing belongs in the contractor’s scope. A failed shower pan is a different repair from the remodel range above.
Questions homeowners ask
- Does a bigger bathroom always cost more per square foot?
- Not in this model. The rate stays the same across 15 to 200 square feet, which is how HomeGuide’s size table behaves. Very small rooms still have a toilet and a sink, so a real bid can beat the low end or miss it.
- Is moving the shower included?
- No. The source treats moved pipes and wiring as extra. They are listed under costs not fully captured, without a made-up dollar add-on.
- Why is the 35-square-foot full low end $8,800, not $8,750?
- Because $250 × 35 is $8,750, and the calculator rounds to the nearest $100. That lands on the same $8,800 HomeGuide prints for that cell.
- Does this include a new bathtub?
- A partial or full row assumes a broad fixture scope, not a named tub model. Ask the bidder to list the tub, valve, and glass.
Sources
- HomeGuide, “How Much Does a Bathroom Remodel Cost? (2026),” updated June 20, 2025. Size table from 15 through the row labeled 200 square feet, including a 35-square-foot full remodel at $8,800–$17,500 and a 50-square-foot partial remodel at $7,500–$15,000. https://homeguide.com/costs/bathroom-remodel-cost
Illustrative check: 50 sq. ft., partial scope, national baseline. Production result: $7,500–$15,000, midpoint about $11,000.
Fence installation planning estimate
Price a new wood, vinyl, or chain-link run from HomeGuide’s installed price per linear foot, with old-fence removal only if you add it.
Nothing is saved. Linear feet are the fence line, not the lot’s square footage. Call 811 before anyone digs. This tool does not locate your property line.
Your planning estimate
Enter the fence length and a material, then calculate.
Estimated installed range
Typical planning midpoint
Why this estimate moved
Possible costs not fully captured
How this estimate is calculated
Last pricing review: October 2026. Rates are installed prices per linear foot.
1. New fence = length × material rate. Wood $20 / $35 / $50. Vinyl $30 / $45 / $60. Chain-link $10 / $20 / $30. The wood and vinyl ends are HomeGuide’s published ends. The mids are the averages. Chain-link uses $10–$30. HomeGuide also prints a $9 low in one table and $10–$40 in a later sentence. This calculator does not use $9 or $40. 2. If removal is yes, add length × $10 / $15 / $20. 3. Multiply the sum by 0.90, 1.00, or 1.15. Round to the cent, then to the nearest $100.
Height is not a separate multiplier. A 6-foot privacy fence is the usual reading of the wood and vinyl bands. A much taller fence can cost more, and that difference is not calculated here.
Before requesting quotes
- Confirm the property line before you accept a length. A survey beats a tape measure across a neighbor’s lawn.
- Call 811 before digging. Utility marks are not optional.
- Ask whether one walk gate is included, and how an extra gate or a driveway gate is priced.
- Ask who pulls the permit, and whether post holes have to reach a frost depth.
Related guide: Fence Installation Cost 2026 covers materials, gates, removal, permits and quote variables. Browse all calculators. Utility locating: Call 811.
Safety
Digging a fence can hit buried utilities. Use 811 and wait for the marks. This calculator does not tell you where the property line is, and it does not tell you to set posts. A fence that blocks sight lines at a driveway can be a traffic problem as well as a code problem.
Questions homeowners ask
- Does the price include a gate?
- Not as a separate line. A basic walk gate is sometimes inside a contractor’s per-foot bid and sometimes not. Extra gates and automatic openers are listed as not fully captured.
- Why is chain-link $10–$30, not $9–$40?
- HomeGuide’s material table says about $9–$30, and another sentence says about $10–$40. Using both ends at once would pretend the sources agree. The calculator keeps the tighter $10–$30 band and says so.
- Is removal included in the new-fence price?
- No. Add it only if the old fence comes out. Replacement is not the same number as new installation plus this removal line; HomeGuide also prints a separate replacement band of about $30–$80 per foot, which this tool does not use.
- Does a corner or a slope cost more?
- Often, yes. Those conditions are not in the formula. They belong in the written quote.
Sources
- HomeGuide, “How Much Does Fence Installation Cost? (2026),” written by Sarah Noel, February 3, 2026. Wood $20–$50, vinyl $30–$60, chain-link table $9–$30 and a later $10–$40 sentence, removal $10–$20 per foot. https://homeguide.com/costs/fence-installation-cost
- Call 811, for the instruction to have buried utilities marked before digging. Not a price source. https://call811.com/
Illustrative check: 150 linear feet of wood, no removal, national baseline. Production result: $3,000–$7,500, midpoint about $5,300.
Deck building planning estimate
Price a new deck from a published material-and-height card. The card is the formula. There is no second railing percentage.
Nothing is saved. This is not a structural design. Ledger attachment, footings, and guardrails are life-safety work for a qualified builder.
Your planning estimate
Enter the deck area, material, and height, then calculate.
Estimated installed range
Typical planning midpoint
Why this estimate moved
Possible costs not fully captured
How this estimate is calculated
Last pricing review: October 2026. Amount = deck area × the rate card, then the scenario.
Pressure-treated: ground $25 / $28 / $30; elevated $30 / $40 / $50; second-story $50 / $55 / $60. Cedar: ground $30 / $35 / $40; elevated $30 / $38 / $47; second-story $50 / $55 / $60. Composite: ground $40 / $50 / $60; elevated $40 / $60 / $80; second-story $50 / $65 / $80. Multiply area by that rate. Then multiply by 0.90, 1.00, or 1.15. Round to the cent, then to the nearest $100.
Ground-level pressure-treated matches HomeGuide’s about $25–$30 ground-level row, with $28 as the midpoint. Elevated pressure-treated matches the overall $25–$50 pine band’s upper reading and the elevated $30–$50 row. Composite elevated matches $40–$80. A basic railing is treated as already inside those installed rates. It is not added again.
Before requesting quotes
- Ask whether the quote includes footings below frost depth, the ledger flashing, and a code guardrail.
- Ask how stairs are counted. One basic run is the assumption behind the elevated and second-story bands, not a custom stair tower.
- Ask who pulls the permit and who checks the ledger bolts into the house framing.
- Compare two quotes that name the same board and the same height.
Related guide: Deck Building Cost 2026 covers material choices, railings, stairs, permits and structural cost drivers. Browse all calculators.
Safety
A deck ledger that pulls off the house, or a guardrail that is too short, is a fall hazard. This calculator does not specify bolts, footing depth, or joist size. Do not treat the range as a building plan. Elevated and second-story work needs a builder who will pull the permit the jurisdiction requires.
Questions homeowners ask
- Are railings extra?
- No second railing line is added. HomeGuide’s installed deck prices used here are for a built deck, and a basic rail is treated as part of that. Cable rail, glass, or a custom rail can cost more and is not in the formula.
- Why is second-story cedar $50–$60, not $30–$47?
- The $30–$47 cedar band is not labeled as a second-story price. The second-story structural band on the same page is about $50–$60. The calculator uses that structural band and says so.
- Does composite at ground level have its own published row?
- No. Ground-level composite uses $40 / $50 / $60, the lower part of the $40–$80 composite installed band. That split is a planning choice, and the page says it is not a separate surveyed cell.
- Is an old deck’s demolition included?
- No. Removal, a hot tub pad, and multi-level framing are outside this card.
Sources
- HomeGuide, “How Much Does It Cost to Build a Deck? (2026),” February 10, 2026. Installed pressure-treated pine about $25–$50, cedar about $30–$47, composite about $40–$80; ground-level about $25–$30, elevated about $30–$50, second-story about $50–$60. https://homeguide.com/costs/cost-to-build-a-deck
- Home Cost Desk’s cost-guide index describes a typical deck as about $25–$60 per square foot in 2026. Composite on this calculator can sit above that typical line because HomeGuide’s composite band goes to $80. https://homecostdesk.com/category/cost-guides/
Illustrative check: 144 sq. ft., pressure-treated, elevated, national baseline. Production result: $4,300–$7,200, midpoint about $5,800.
Calculator roadmap
Ten calculators are live now. Additional tools—currently including drywall and tile quantity planning—will be added only after their formulas, inputs and source data have been reviewed.
How to use these calculators
- Measure the actual project area instead of using the home's total square footage.
- Run a low and high scenario when waste, room shape, coats, or material size is uncertain.
- Use the result to estimate quantities and compare contractor assumptions—not to predict an exact final invoice.
- Add demolition, delivery, disposal, permits, repairs, access difficulty, taxes, and contractor-specific labor separately when they apply.
Related planning guides
- Home Improvement Cost Calculator 2026 — build an all-in project budget from materials, labor, permits, demolition and contingency.
- Flooring Installation Cost 2026 — compare installed prices by material and room.
- Interior Painting Cost 2026 — estimate room and square-foot pricing before requesting bids.
- Home Renovation Budget 2026 — plan contingency, contractor quotes and hidden expenses.
What these tools do not replace
These calculators are planning aids. They do not account automatically for structural repairs, electrical or plumbing changes, local permits, hazardous-material work, difficult access, code requirements, regional labor rates, or contractor minimum charges. Use them to prepare better questions and more consistent quote comparisons.
Which calculator should you use?
| Tool | Best for | Main output |
|---|---|---|
| Room Area Calculator | Rooms, walls and general project sizing | Square footage |
| Paint Quantity Calculator | Interior paint planning | Estimated paint quantity based on area and coats |
| Flooring Area & Waste Calculator | Flooring orders and material planning | Project area plus selected waste allowance |
| Annual Home Maintenance Budget Calculator | Building a yearly and monthly repair reserve | 1%, 2% and 3% reserve targets from estimated home value |
| Roof Replacement Cost Calculator | Planning a full roof replacement before contractor quotes | Low-to-high installed range by roof size, material, pitch, tear-off, decking and cost scenario |
| HVAC Replacement Cost Calculator | Planning furnace, central air, heat pump or ductless replacement | Installed low-to-high range with optional ductwork and market scenario |
| Kitchen Remodel Cost Calculator | Budgeting a kitchen remodel by room size and scope | Published project-range estimate by size, scope and market scenario |
| Bathroom Remodel Cost Calculator | Budgeting a bathroom remodel by floor area and scope | Installed low-to-high range based on floor area and remodel scope |
| Fence Installation Cost Calculator | Planning wood, vinyl or chain-link fencing | Installed range by linear feet, material, removal and market scenario |
| Deck Building Cost Calculator | Planning a new deck by size, material and height | Installed range from deck area, material, height and market scenario |
Calculator FAQ
Why does the calculator result differ from a contractor quote?
A contractor may include labor, demolition, disposal, access difficulty, protection, repairs, taxes, permits, travel, minimum charges and material markups that are not part of a simple quantity calculation.
Should I add a waste allowance?
Often yes. Flooring, tile and other cut materials usually need extra quantity for cuts, defects and layout. The appropriate allowance depends on room shape, pattern, material size and installer method.
Can I use these results to buy materials?
Use them as a planning check, then confirm final quantities against manufacturer coverage, package sizes, installer requirements and the actual measured site before ordering non-returnable material.