Concrete Footing Calculator
Use inside form dimensions for strip footings under bearing walls or aligned pier lines.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Length is the run of the footing. Width is cross-section width. Depth is vertical thickness poured.
What the math is doing
Volume = length × width × depth, plus optional waste.
Frequently asked questions
Keyway or step?
Add small volumes separately.
Cold joints?
Pour planning is outside this geometry tool.
Reinforcement?
Use the rebar calculator for mats and laps.
Frost depth?
Match local footing depth requirements.