Bidcore | Free tools | Pricing
Concrete yardage calculator
How many cubic yards do you need to order? Enter the size of the pour. You get yards, trucks and bags, with every step of the math shown.
Common questions
How many cubic yards of concrete do I need for a slab?
Multiply length by width by thickness in feet, then divide by 27. A 10 by 10 foot slab that is 4 inches thick is 10 x 10 x 0.333 = 33.3 cubic feet, which is 1.23 cubic yards. Add a few percent for waste.
How much extra concrete should I order?
Five to ten percent is common. Go toward ten for hand-dug footings, uneven subgrade, thin forms that bow, or any job where running short means a second truck and a cold joint.
How many bags of concrete mix is a yard?
An 80 pound bag makes about 0.6 cubic feet, so a cubic yard is about 45 bags. A 60 pound bag makes about 0.45 cubic feet, so a yard is about 60 bags. Bags make sense for small jobs. For more than a yard or two, ready-mix is usually cheaper and faster.
How much concrete does a truck carry?
A standard ready-mix truck carries up to about 10 cubic yards. Plants often charge a short-load fee on small orders, so ask yours where that line is before you decide how much to order.
Does this include rebar, forms, or the base under the slab?
No. This is the volume of concrete only. A price also needs the concrete cost per yard, base stone, forms, reinforcing, finishing labor, trucking and your margin.
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