About
FootingCalc is a free collection of concrete footing calculators built by the team behind FootingTakeoff, an AI takeoff tool for footing contractors.
The rule for every tool on this site: show the formula. A calculator you can't verify is just a guess with a nicer font. Each page displays exactly how the number is computed so estimators can defend it and DIYers can learn it.
These calculators are estimating aids, not engineering. Footing sizes and depths are governed by your approved plans, soil conditions, and local building code — when in doubt, ask your building department or engineer.
Found an error or want another calculator? hello@footingcalc.com