Construction calculators for every trade
Work out materials and costs for concrete, roofing, flooring, framing and more. Enter your measurements in feet or metres and get the answer as you type.
Includes 10% for waste and uneven ground.
Each calculator shows its formula and a worked example.
Feet or metres, dollars or pounds, on every calculator.
No account or email. Copy or print your results.
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See all calculators →All calculators
46 calculators, grouped by trade.
No calculators match your search. Try another word, like "concrete" or "roof".
Concrete & Foundations
Roofing
Flooring
Walls & Exterior
Structural & Materials
Plumbing & Electrical
Landscaping & Outdoor
Windows, Doors & Insulation
How our calculators work
Built on published methods
We use the same methods trades work to, from IRC span tables and NEC wire sizing to BS 7671 and manufacturers' coverage figures.
Tested on worked examples
New calculators are checked against examples worked by hand, and the example is printed on the page so you can follow it.
Clear about limits
Results are for planning and budgeting. Where safety is involved, we say when to bring in a licensed professional.
Got your numbers? Get quotes from local pros.
Compare at least three quotes before you buy materials.
Questions
Can't find an answer? Contact us and we'll get back to you.
Are these construction calculators really free?
Yes. Every calculator on this site is completely free to use, with no account, signup, or download required.
Do your calculators work in both USA and UK units?
Yes. Every calculator includes a unit toggle that switches instantly between imperial (feet, inches, cubic yards) and metric (metres, centimetres, cubic metres) measurements.
How accurate are the cost estimates?
Our cost calculators use aggregated, up-to-date contractor pricing data to give you a realistic budgeting range. Actual costs vary by region, site conditions, and contractor, so we always recommend getting a written quote before starting a project.
Do I need to create an account to use these tools?
No. None of our calculators require an account, login, or personal information. Just enter your measurements and get your result instantly.
How many calculators do you have?
We currently offer 46 calculators across concrete, roofing, flooring, walls, structural materials, plumbing, electrical, landscaping, windows, and UK-specific projects, with new calculators added regularly.
Can I use these calculators on my phone?
Yes. Every calculator is fully mobile-responsive and works the same on phones, tablets, and desktop computers.