About Square Foot Math

Square Foot Math is a free set of calculators that answer one question for home and garden projects: how much do I need to buy?

Each calculator works in feet or metres, shows every step of the math, and lets you change the assumptions. You can add results to a project list that stays in your browser, so you have a shopping list when you are done.

The calculators run entirely in your browser; nothing you type is sent to us. The site is independent and supported by advertising. See how we calculate for the formulas and constants we use.