Construction & Renovation Calculators.
Estimate materials, project costs, and build timelines — instantly and accurately with 40+ pro-grade calculators for paint, concrete, tile, lumber, roofing, kitchen & bathroom remodels, and more.
Browse 40 calculators across three core categories
Whether you're estimating materials for a weekend project, pricing out a major remodel, or comparing DIY versus hiring a pro — there's a tool here built for the question you're asking.
Materials Calculators
Calculate exactly how much material you need for any project. Pure geometry, instant results.
Cost Estimators
Estimate project costs with industry-average price ranges from published sources.
Utility Calculators
Unit converters, ROI tools, and project planning aids for builders and homeowners.
The calculators homeowners reach for first
A curated set of the tools we see used most often — for the questions every homeowner asks before starting a project.
Paint Calculator
How many gallons of paint you need.
Flooring Calculator
Square footage of flooring material to buy.
Tile Calculator
Number of tiles needed including grout joints.
Concrete Calculator
Cubic yards and bags of concrete required.
Mulch Calculator
Cubic yards and bags of mulch for any bed.
Decking Calculator
Boards, joists, and fasteners for a new deck.
Roofing Calculator
Squares and bundles of shingles for any roof.
Kitchen Remodel Cost Estimator
Estimate kitchen remodel cost by scope.
Bathroom Remodel Cost Estimator
Estimate bathroom remodel cost by type.
Deck Building Cost Estimator
Estimate the cost of building a deck.
Square Footage Calculator
Calculate square footage for any room or shape.
Home Improvement ROI Calculator
See which renovations recoup the most resale value.
DIY vs Contractor Cost Comparison
Compare DIY material cost to a hired-pro estimate.
From dimensions to dollars in three quick steps
Every BuildWise calculator follows the same simple flow. No accounts, no waiting, no spreadsheet downloads — just answers.
Pick a calculator
Choose from materials, cost estimators, or utility tools.
Enter your dimensions
Plug in your project measurements and specifications.
Get your answer
Instant results with breakdowns, waste factors, and unit conversions.
Built by builders, for everyone planning a project
No accounts. No paywalls. No data harvesting. Just the same formulas working contractors use — free for homeowners, DIYers, and tradespeople alike.
Quick answers about how the calculators work, where the cost data comes from, and what to expect when you use the site.
Frequently asked questions
Yes. Every calculator is free, requires no signup, and runs entirely in your browser. We make money from display ads and affiliate links to retailers and contractor-matching services — never from you.
Materials calculators use standard industry formulas and are as accurate as the dimensions you enter. Cost estimators use national-average price ranges from published sources (HomeAdvisor, Angi, Remodeling Magazine) — treat them as budgeting ballparks, not contractor quotes.
No. There are no accounts, logins, or email captures anywhere on the site. Your inputs stay in your browser and are never sent to a server.
Yes. Every calculator is designed mobile-first for use on a phone at the hardware store or on a job site.
Cost ranges are refreshed annually from published industry sources. Each cost estimator shows its source and last-updated date in the methodology section.
Yes — where practical, calculators accept or display both imperial and metric values. Cubic yards ↔ cubic meters, square feet ↔ square meters, and other common conversions are built in.