Enter your project dimensions to estimate concrete in cubic yards and bags. Choose a project type and add an ordering allowance or local price if needed.
Your concrete estimate
Order approximately
—yd³
—Calculated geometric volume
—Recommended order quantity
—Bag equivalent · buy count rounded up
—Approximate order weight
Planning estimate only. Bag yield, density, supplier practices and project conditions vary. Confirm quantities with your supplier; this is not an engineering specification.
Rectangular footing: enter its length, width and depth; use quantity for identical footings.
Round column or pier: measure the diameter and height, then enter the number of matching columns.
Post holes: measure hole diameter and depth, and enter the hole count.
Measure each distinct section once. For multiple sections with different dimensions, enter them separately rather than overlapping their footprints.
Worked round-column example
One 2 ft diameter round column, 5 ft tall, with a user-selected 10% allowance: geometric volume is 15.71 ft³ (0.58 yd³); adjusted order volume is 17.28 ft³ (0.64 yd³). At a selected 0.60 ft³ label yield, the engine rounds up to 29 whole 80 lb bags. The allowance is optional, not a required quantity.