Build Smarter.
Calculate Faster.
Plan Better.
Free home-improvement calculators, renovation cost estimators, DIY guides, AI project planning and material calculations — all in one beautiful platform.

Every material, every project
Professional-grade math with a friendly interface. Pick a calculator to get instant quantities, waste factors and cost estimates.
Concrete Calculator
Slabs, footings & columns
Paint Calculator
Interior & exterior walls
Tile Calculator
Floor & wall tiles
Flooring Calculator
Hardwood, laminate & vinyl
Deck Calculator
Boards, joists & fasteners
Roof Calculator
Shingles & underlayment
Coming soon — 29 more:
Describe your project.
Get a full plan.
"I want to build a 20×20 concrete patio." — BuildMate AI returns materials, quantities, labor cost, timeline, a shopping list and a step-by-step guide.
Try the AI Estimator▸ prompt: 20×20 ft concrete patio, 4" thick
◂ concrete: 5.43 yd³ (with 10% waste)
◂ rebar: 320 ft of #4 @ 16" O.C.
◂ gravel base: 2.5 yd³ of ¾" crushed
◂ labor: ~24 hrs · 2 workers
◂ est. cost: $1,850 – $2,400
◂ timeline: 3 days (form → pour → cure)
✓ Ready to export as PDF
Every corner of the house
From the foundation to the roof and everything in between.
Concrete
6 calculators
Roofing
3 calculators
Painting
2 calculators
Flooring
5 calculators
Outdoor
6 calculators
Landscaping
5 calculators
Structural
5 calculators
Cost
4 calculators
Everything a pro needs. Simple enough for anyone.
Lightning fast
Instant results, no reloads, no ads in the way.
Contractor-grade math
Formulas reviewed by licensed builders and engineers.
Export everything
PDF, Excel, print-ready reports and shopping lists.
AI-first
Describe the project in plain English — get a full plan.
Save & sync
Cloud-synced projects across web, iOS and Android.
100% free
Every calculator, every guide — no paywall.
Ready to build something great?
Join thousands of homeowners and contractors who plan smarter with BuildMate.