Concrete Footing for 20 Linear Feet
This calculator is pre-filled to estimate the concrete footing for a 20 linear feet. Change any field to match your project, and enter your local price for a precise cost.
Concrete Footing calculator
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How to estimate concrete footing
- Footing size is set by your local code and soil; common residential footings run 16-24 inches wide and 8-12 inches deep.
- Add the length of every footing run together for total length, including corners.
- Pour footings monolithically where possible so you are not joining cold pours.
Frequently asked questions
How deep should a footing be?
Footings must sit below the local frost line and on undisturbed soil. Depth is code-driven, commonly 12 inches or more in cold climates.