To find the amount of concrete you need, use our concrete calculator or this simple volume formula: Length × Width × Thickness. Measure your project and multiply the dimensions to get cubic feet or meters. Divide by 27 to convert cubic feet to cubic yards.
People also ask
What is the formula for figuring concrete?
Calculating the volume for concrete requires using three dimensions: length times width (which is area) times the height (thickness) or L x W x H. If you are using feet as your standard unit of measurement, this formula will give you the volume of concrete in cubic feet.
How many yards of concrete for a 30x30 slab 4 inches thick?
So, for a 4-inch slab you'll need 1.24 cubic yards (56 80lb bags), but a 6-inch slab requires 1.85 yards (84 80lb bags). If your slab is a different size or thickness, use our calculator to determine the amount of concrete.
How to calculate square feet for concrete?
First, determine how much concrete you need, then measure the length and width you would like to cover and multiply the two to determine the square footage. Measure the thickness in feet and multiply it by the square footage to determine the cubic feet.
How many yards of concrete for a 30x40?
assuming the normal 4″slab the volume would be theoretically 9.875 yards, so this will be rounded up to 10 yards (cubic).
Free concrete calculator for contractors. Easily calculate the amount of concrete needed in cubic feet, yards, and bags for a concrete slab.
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