Footings Calculator

Determine concrete volume for strip footings, pier footings, and pad footings. Sized to IRC minimum bearing requirements by soil class.

Footing calculations require knowing the footing type (strip, pier, or pad), dimensions, and depth. Strip footings run continuously under walls. Pier footings are cylindrical and support point loads. This calculator computes concrete volume in cubic yards for each type, making it easy to get a supplier quote.

Frequently Asked Questions

What is the minimum footing depth per IRC?

IRC R403.1.4 requires footings to extend below the frost line, which varies by climate zone. Check your local jurisdiction for the exact depth requirement.

How wide should a residential footing be?

IRC Table R403.1 specifies minimum footing widths based on the number of stories and soil bearing capacity. A typical single-story footing on normal soil is 12" wide.

Do I need rebar in footings?

IRC R403.1 requires at least two continuous #4 (½") rebar in most footings. Your local code may require more depending on soil conditions and structure type.

Estimates are for planning purposes only. Verify quantities with your supplier and confirm code requirements with your local building department.