ABOUT THIS SITE

Useful math.
Visible assumptions.

Free calculators with editable assumptions, visible formulas and downloadable estimates for everyday home projects.

A small toolbox for everyday projects

Home Project Calculators turns measurements into material estimates for painting, landscaping, concrete and flooring. A separate budget tool brings your known costs and contingency into one calculation.

How the numbers work

Every tool shows its formula, uses editable inputs and includes an example. Quantities that are purchased in bags, cans or boxes round up to whole units. Coverage and yield should come from the actual product you plan to buy.

Take the estimate with you

Download a plain-text result for your shopping list or project notes. There is no account to create and your inputs stay in the page. Reloading resets them. Results do not specify structural designs or replace a supplier or installer’s measurements.

Independence and funding

Independent planning calculators. Results are material estimates, not professional specifications.

There are no paid placements, affiliate links, or connected lead buyers in this version. Any future paid relationship will be disclosed where it appears.