Footing / Column Concrete Calculator

Easily estimate the concrete volume and bag counts for footings, columns, and round holes. Accurate calculations for your construction projects.

Hole, Column, or Round Footings

Volume

  • Cubic yards:12.57
  • Cubic meters:9.61
  • Cubic feet:339.29

Bags (approx.)

  • 60-lb bags:753.98
  • 80-lb bags:565.49

Assumes ~0.45 ft³ per 60-lb bag and ~0.60 ft³ per 80-lb bag. Add 5–10% waste.

Results appear in the card above. For irregular holes or loose soil, add 5–10% extra to reduce the risk of shortfall.
Diagram

Tips

  • Add 5–10% extra for waste and uneven ground.
  • Confirm local building codes for thickness and reinforcement.
  • Choose 60lb or 80lb bags based on handling preference.

Footing & Column FAQ

Q1How do I calculate concrete for a footing or column?›

Use the formula π × radius² × height for cylindrical columns or round footings. The footing calculator handles unit conversion and bag counts.

Q2What is the typical depth for a concrete footing?›

Footing depth varies by soil type and load. A common residential footing is 12–24 inches deep. Always confirm with local building codes.

Q3Do round footings need rebar reinforcement?›

Yes, most footings and columns require rebar cages for strength. The calculator focuses on volume, but reinforcement is determined by code.

Q4How many cubic yards of concrete do I need for a column?›

Divide the volume in cubic feet by 27. The footing calculator instantly converts results into cubic yards and bag counts.

Q5Should I add extra concrete when pouring footings?›

Yes, add 5–10% extra to account for irregular holes and settling. The calculator result includes this suggestion.