# How to Calculate the Relative Yield of Concrete

by Robert Preston; Updated September 26, 2017

Relative yield is a measurement that tells how great a volume of concrete was produced, relative to the amount of concrete that was purchased and mixed. While calculating relative yield uses a formula with only two variables, in order to calculate relative yield, there are several simple calculations that must be made to determine the numbers to plug into the equation. A calculator can help with these equations, however if you are good with numbers, you can complete the calculations using scrap paper, as it uses only subtraction and division.

#### Items you will need

• Container
• Small bucket
• Concrete mix
• Water
• Scale
• Calculator or paper and pencil
Step 1

Weigh the empty bucket and container, and record the weight of each.

Step 2

Mix the concrete and water in the container, following the proportional instructions on the concrete bags, which vary among different mixes.

Step 3

Fill the bucket with mixed concrete.

Step 4

Weigh the bucket when filled with concrete.

Step 5

Find the unit weight by subtracting the weight of the empty bucket from the weight of the full bucket, and divide the result by the volume of the bucket.

Step 6

Weigh the container, and subtract the weight of the empty container to determine to weight of concrete in the container.

Step 7

Add the weight of the concrete in the container to the weight of the concrete in the bucket to find the total weight of the mixed concrete.

Step 8

Divide the weight of the mixed concrete by the unit weight to find the yield.

Step 9

Divide the yield by the amount of concrete mix used to find the relative yield.