Q:

# How do you calculate concrete yardage?

A:

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 materials are available. With a pocket calculator and tape measure, the process takes only a few minutes.

Know More

## Keep Learning

1. Measure the project

Use a tape measure to determine the size of the project. Enlist a helper to hold one end of the tape. Record the measurements in feet. Convert any inches over the full foot measure to a fraction of a foot by dividing the remaining inches by 12. Measure and record the dimensions of any areas that lie outside the larger rectangle in a similar method.

2. Multiply to find volume

Convert the thickness of the concrete to a fraction of a foot. Calculate the volume by multiplying length by width by depth. Add any additional volumes from out of the main rectangle.

3. Convert to cubic yards

The volume figured using measurements in feet provides the number of cubic feet. Divide the volume by 27, the number of cubic feet in 1 cubic yard.

4. Include overage

Multiply 1.05 by the number of cubic yards provided for over-excavation, spills and unforeseen events. Many concrete companies have a minimum load size or an additional charge for small loads, making it less expensive to have a small amount of materials left over than to have to order more concrete.

Sources:

## Related Questions

• A:

To determine the number of floor tiles required to cover a given space, multiply the length by the width of the space in feet to calculate the total square footage or area, then divide that number by the size of the tile. This is easiest with 12-inch tiles, but it is possible for any size of tile.

Filed Under:
• A:

To calculate the board feet needed for a wood project, multiply width by length by thickness and divide by 144. All of the measurements should be in inches. For example, 8 inches by 72 inches by 1.5 inches divided by 144 equals 6 board feet.

Filed Under:
• A:

Calculate the board feet of lumber by multiplying the length, thickness and width in inches and dividing the result by 144. An online board feet calculator is available on HardwoodStore.com, as of 2015.