MADE FOR YOUR NEXT PROJECT
Free construction & home improvement calculators
Get a clear estimate of the materials your project needs—so you can plan the next step with confidence.
- Free
- No sign-up
- Runs in your browser
- US & metric
THE RIGHT TOOL FOR THE JOB
Start with a solid estimate
Gravel Calculator
Estimate gravel volume, weight, and material cost for a driveway, path, or garden bed.
Paint Calculator
Estimate paint coverage and the number of gallons needed for your walls.
Tile Calculator
Calculate approximate tile quantity and boxes for a rectangular floor or wall.
Concrete Calculator
Estimate concrete volume for a slab and optionally calculate material cost.
Square Footage Calculator
Add multiple rectangular rooms or spaces to find their combined square footage.
Mulch Calculator
Estimate mulch volume for garden beds and landscaping areas.
BUILT AROUND YOUR PROJECT
Explore by category
SIMPLE BY DESIGN
From measurements to a smarter plan
Take a few measurements, choose realistic assumptions, and use the estimate as a starting point for a supplier conversation.
Learn about BuildCalc- 01
Choose your project
Find a calculator that fits the material and work you have in mind.
- 02
Enter your measurements
Use the units shown and adjust assumptions to match your project.
- 03
Review your estimate
Understand the calculation, then confirm product details with your supplier.
GOOD TO KNOW
Frequently asked questions
A few helpful notes before you get started.
Are BuildCalc estimates exact?
No. They are arithmetic estimates based on the measurements and assumptions you provide. Product coverage, material density, site conditions, and cutting waste vary.
Should I add extra material?
Many projects need some allowance for cuts, spillage, or uneven areas. Choose an allowance that suits the project and verify it with product instructions or a qualified supplier.
Are my measurements sent to a server?
No. Calculations run in your browser. BuildCalc does not send calculator inputs to a server.