Home renovation cost calculators

Free, no-signup renovation & remodeling calculators for homeowners, DIYers and buyers — bathroom and kitchen remodel cost, paint / drywall / flooring / tile material quantities, basement and addition cost per square foot, whole-house cost-per-sqft, and budget, contingency, ROI and loan math. Every tool works on the prices you enter and shows its formula, a worked example and a reference table.

Bathroom Remodel

What a bathroom remodel costs on your line items and prices: full remodel estimate, walk-in shower, tub-to-shower conversion, vanity, and tile area & cost.

All Bathroom Remodel tools →

Kitchen Remodel

Budget a kitchen from the prices you enter: full remodel estimate, cabinet cost & refacing, countertop and backsplash square-foot cost, and an island.

All Kitchen Remodel tools →

Interior Finishes

Material quantities and cost: paint gallons & painting cost, drywall sheets, flooring cost by material, tile installation, and trim/baseboard.

All Interior Finishes tools →

Basement & Additions

High-intent per-sq-ft budgeting: basement finishing & remodel, room/home addition, sunroom, and a garage conversion / ADU budget.

All Basement & Additions tools →

Whole-House & Cost per Sq Ft

The "how much to renovate a house" tools: whole-house and gut-renovation cost, a cost-per-square-foot normalizer, and a room-by-room roll-up.

All Whole-House & Cost per Sq Ft tools →

Budget, Financing & ROI

Plan the money: budget allocator by %, a contingency planner, a renovation ROI / cost-vs-value ratio, and an illustrative loan-payment tool.

All Budget, Financing & ROI tools →
Planning estimate: this is a planning estimate from the numbers you enter and standard reference quantities — not a bid or a contract. Get itemized written quotes from licensed contractors and confirm measurements before you commit.

Bathroom Remodel

Bathroom Remodel CostBathroom Remodel Cost CalculatorWalk-In Shower CostWalk-In Shower Cost CalculatorTub-to-Shower ConversionTub-to-Shower Conversion CostVanity CostBathroom Vanity Cost CalculatorBathroom Tile Area & CostBathroom Tile Area & Cost

Kitchen Remodel

Kitchen Remodel CostKitchen Remodel Cost CalculatorCabinet CostKitchen Cabinet Cost CalculatorCabinet Refacing CostCabinet Refacing Cost CalculatorCountertop CostCountertop Cost CalculatorBacksplash CostBacksplash Cost CalculatorKitchen Island CostKitchen Island Cost Calculator

Interior Finishes

Interior Painting Cost & PaintInterior Painting Cost & Paint CalculatorDrywall Sheets & CostDrywall Sheets & Cost CalculatorFlooring Cost by MaterialFlooring Cost Calculator by MaterialTile Installation CostTile Installation Cost CalculatorBaseboard & Trim CostBaseboard & Trim Installation Cost Calculator

Basement & Additions

Basement Finishing CostBasement Finishing Cost CalculatorBasement Remodel CostBasement Remodel Cost CalculatorRoom Addition CostRoom Addition Cost CalculatorSunroom CostSunroom Cost CalculatorGarage Conversion / ADUGarage Conversion Cost Calculator

Whole-House & Cost per Sq Ft

Whole-House Renovation CostWhole-House Renovation Cost CalculatorGut Renovation CostGut Renovation Cost CalculatorRenovation Cost per Sq FtRenovation Cost per Square FootRoom-by-Room BudgetRoom-by-Room Renovation Budget

Budget, Financing & ROI

Budget Allocator by %Renovation Budget Allocator by PercentageContingency PlannerRenovation Contingency PlannerRenovation ROI / RecoupRenovation ROI & Cost-vs-Value RecoupLoan Payment & AffordabilityHome Improvement Loan Payment Calculator

Guides

Plain-English background to the numbers: what drives each budget, which line items people forget, and how to read a quote.

How much does a bathroom remodel cost?What drives a bathroom remodel budget, how to estimate it line by line on your own prices, and how much contingency to keep for surprises behind the walls.Walk-in shower & tub-to-shower conversion costWhat goes into a walk-in shower budget and a tub-to-shower conversion worksheet, how to size the tiled wall area, and where the glass and labor land.How much does a kitchen remodel cost?Where the money goes in a kitchen remodel, how to estimate it line by line on your own prices, and how much contingency a kitchen project really needs.Kitchen cabinet cost: new vs. refacing, and $/linear footHow to price kitchen cabinets by the linear foot, when refacing beats replacing, and how to compare the two on the prices you enter from your own quotes.Countertop & backsplash cost: measuring square footageHow to turn cabinet runs into countertop square footage, how to size a backsplash with a waste factor, and how to price both on the $/sq ft you enter.How much paint do I need? (gallons & coats)How to work out the wall area of a room, subtract doors and windows, and calculate the gallons of paint you need for two coats at standard coverage.How many drywall sheets do I need? (4×8 = 32 sq ft)How to count drywall sheets from wall and ceiling area using the fixed 32 sq ft per 4×8 sheet convention, plus mud, tape and how much extra to buy.Flooring cost by material & how much waste to orderHow to estimate flooring cost from area and a waste factor, why you order more than you measure, and how to split material and installation on your own prices.Tile installation cost: area, waste and boxesHow to estimate tile installation cost from area and a waste factor, turn square feet into boxes of tile, and split tile from labor on the prices you enter.Cost to finish a basement (per sq ft & line items)How to estimate the cost to finish a basement two ways — a quick per-square-foot pass and a detailed line-item worksheet — on the prices you enter.How much does a room addition cost per square foot?How to estimate a room addition by area and a per-square-foot figure you enter, why it costs more than finishing existing space, and what add-ons to include.Cost to gut a house per square foot (down to studs)How to estimate a gut renovation by area and a higher per-square-foot band, how it differs from a cosmetic remodel, and how to normalize any quote to $/sq ft.Budgeting a renovation: allocation & the contingency you needHow to split a renovation budget sensibly across categories, why a 10–20% contingency is essential, and how to plan both on the figures you enter.Renovation ROI & financing math (illustrative, not advice)How the renovation ROI recoup ratio works on your figures, how a loan monthly payment is calculated, and why both are illustrative math, not advice.Baseboard & trim installation cost per linear footWhy trim is priced per linear foot, what the material and labor halves each depend on, and how to turn a room perimeter into a baseboard quote you can check.

All guides →

Built for the whole project — and to stay correct forever

RenovationCalcs gathers the calculations homeowners and buyers reach for across a whole project — room-by-room cost, material quantities, whole-house cost-per-square-foot, and budget & ROI — in one focused hub, in US units, without signup, with transparent formulas. Every tool shows not just the answer but the underlying formula, a worked example and a reference table.

Because the tools rest on timeless project math (area = length × width; material quantity = area ÷ coverage × (1 + waste); cost = quantity × your unit price) and stable conventions (a 4×8 drywall sheet = 32 sq ft; paint ~350–400 sq ft per gallon per coat; 10–15% waste on tile and flooring), they stay correct with no maintenance — no material price list, no labor-rate database, no regional cost index, no live loan rate. Cost tools use the prices you enter from your own quotes and bills. More at Sources & formulas, Methodology and About.

Estimates, not bids. Every cost result is a planning estimate — get itemized written quotes from licensed contractors; structural, electrical, plumbing and gas work needs licensed pros and a permit; the financing and ROI tools are illustrative math on your figures, not financial advice, and added resale value is never guaranteed.