Calculate yards of concrete, cubic feet, and 80 lb bag estimates for slabs, patios, driveways, footings, and walls.
Use this concrete yard calculator to calculate yards of concrete for slabs, footings, patios, driveways, and walls with cubic yards, cubic feet, and bag estimates.
The concrete yard calculator formula is simple: measure length and width in feet, convert thickness from inches to feet, multiply the three numbers, then divide by 27. For a slab, this is the same square feet to yards workflow contractors use before ordering ready-mix.
Use consistent units before calculating. When depth is entered in inches, the calculator converts it to feet before dividing by 27.
Practical notes for measuring, converting, and ordering with fewer surprises.
To calculate yards of concrete, convert every measurement to feet, multiply length by width by thickness, then divide by 27. This gives the cubic yards of concrete calculator result before waste.
Use this concrete cubic yard calculator for patios, sidewalks, pads, garage slabs, shed bases, footings, and short retaining walls. It also helps answer how many yards of concrete calculator questions before you call a supplier.
Calculating concrete yards is only one part of ordering. Confirm mix strength, delivery minimums, truck access, and whether your supplier rounds to quarter-yard increments.
This page focuses on the main calculator topic while covering closely related project phrases people use when estimating material quantities.
Short answers for the questions that usually come up before ordering material.
Multiply length by width by thickness, all in feet, then divide by 27. Add 5-10% extra for waste and uneven grade.
At 4 inches thick, 10 x 10 x 0.333 / 27 = 1.23 cubic yards before extra.
Yes. Enter slab length, width, and thickness. The calculator returns cubic yards, cubic feet, estimated tons, and 80 lb bag count.
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