Home Project Calculator Center
Get material quantities, waste allowances, and cost estimates for every home project — concrete, roofing, flooring, paint, drywall, decking, HVAC, electrical, plumbing and more.
All calculators
Pick a category and get instant, accurate results with formulas, examples, and buying tips.
Building Materials
Concrete, drywall, gravel & mulch
Exterior Projects
Roofing, roof pitch, fencing & decking
Interior Projects
Flooring, tile & paint
Home Systems
HVAC, plumbing & electrical
1. Choose your project
Pick from 15 calculators covering concrete, roofing, flooring, paint, drywall, decking, fencing, HVAC, plumbing, and electrical.
2. Enter measurements
Type in your dimensions in feet, inches, or metric. Choose a waste allowance and your local material price.
3. Get the full picture
See exactly how much material to buy, how much extra to allow, and roughly what it will cost — then save, print, or share.
Create a free account to save your calculations
Homeowners and contractors can save project calculations, print results, and share estimates — all free.
Get started — it's free