MathForBuilders is a free set of construction and home improvement calculators for DIYers, homeowners and contractors.
What we do
We turn the math behind building projects (board feet, cubic yards, roof pitch, stairs, asphalt, drywall and more) into simple tools that show every step of the calculation, so you can check the numbers yourself before you buy materials.
Our approach
- Every calculator shows the formula it uses.
- We test each calculator against hand-worked examples before publishing.
- Where a building code applies, we name the code and remind you to confirm with your local building department.
Read more on our methodology page or contact us if you find an error.