Concrete is generally measured in cubic footage, using a volume formula of length x width x thickness. The volume measurement is needed because concrete surfaces of the same coverage area can differ in the amount of actu... More »

Calculate the number of cubic yards of concrete by calculating the volume of the pour and adding 10 to 15 percent to ensure you have enough material. If you calculate volume in cubic inches or cubic feet, use a conversio... More »

Multiplying the length, width and depth, converted to yards, of the area in question provides the amount of concrete needed in cubic yards. This formula is applicable for any square or rectangular area, commonly referred... More »

The formula for concrete calculations is (length x width x depth) divided by 27. The result of this formula provides the number of cubic yards of concrete needed. The measurements must be in feet in order for the equatio... More »

The formula of length x width x depth is used to calculate volume of box-shaped areas. For example, the formula can be used to calculate the volume of storage boxes, topsoil, yards, gardens, and concrete and cement fills... More »

Figure out the amount of concrete to use by calculating the volume of the desired concrete slab and the footings supporting the slab, then converting this area to cubic yards. The method for calculating the volume of con... More »

Multiply figures for length, width and thickness, measured in feet, and divide by 27 to determine the yardage of concrete required. Multiply the total yards by 1.05 to allow for a margin of error to ensure enough materia... More »