Multiply the length by the width to determine square footage. This would be good to know if you had a lot of sono-tubes or a large cylinder to fill. Convert the thickness from inches to feet.
The best way to calculate how much concrete you will need in cubic yards is to do the following.
In our example 1662 cubic yards x 105 17451 cubic yards. This calculator is to be used as an estimating tool ONLY. Multiply the length by the width to determine square footage. The formula for cubic yards is this.