Concrete Footing Calculator
Calculate the volume and weight of concrete needed for continuous footings, including foundations, retaining walls, and grade beams. Enter the length, width, and depth of your footing to get results in cubic yards, bags, and ready-mix truckloads. Buying a little extra reduces the chance of coming up short.
Form: Footing
Units:
Examples:
Examples
- 40 ft footing @ 24 in × 12 in: Common residential footing size.
- 80 ft footing @ 18 in × 10 in: Smaller footing; verify local requirements.
Estimating tips
- Use the largest width/depth you measure—excavations are rarely perfectly uniform.
- Add waste for over-excavation, sloughing, and spillage (5–10% is common).
- Check local code and soil requirements for minimum footing dimensions and reinforcement.
- If ordering ready-mix, confirm truck access and chute reach before pour day.
- Round up bags when mixing by hand to avoid running short mid-pour.
Other forms
Assumptions
- Bag yields and density vary by product; verify values on your bag or supplier spec sheet.
- Cost estimates exclude delivery fees, taxes, and minimum loads.