Concrete Footing Calculator
Calculate concrete volume for wall and column footings.
How It Works
Volume (ft³) = Footing Length × Width × (Depth ÷ 12) × Number of Footings.
Example
For 6 footings of 2 ft × 2 ft at 12 in deep: 2 × 2 × (12 ÷ 12) × 6 = 24 ft³ ≈ 0.89 cubic yards.
Frequently Asked Questions
How deep should footings be?
Most building codes require footings below the frost line — often 12 in deep or more, depending on your region.
Do footings need more concrete than slabs?
Footings often benefit from a higher waste allowance (10–15%) because of formwork, rebar, and uneven excavation.
Can I use the same concrete for footings and slabs?
Yes, a standard 3,000–4,000 psi mix works for both in most residential builds.