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Concrete Slab Calculator - Imperial

Calculate concrete volume needed for a slab using feet and inches for measurements with results in cubic feet, cubic yards and cubic metres

Concrete Calculator For Slabs

Formula's used:

length * width * depth = V

Example calculation:
slab length = 25'
width = 12' - 8"
concrete slab thickness = 6"
It all has to be in the same units. It would be possible to change it all into inches, but that makes for large numbers so it will be easier to convert the inches into a foot value.

12' - 8" - convert 8 inches into feet - divide it by 12 - 8 ÷ 12 = 0.666 feet
12' - 8" then becomes 12.666 feet
convert 6" into a foot value - dividing by 12 - 6 ÷ 12 = 0.5 feet

the calculation then becomes 25 * 12.666 * 0.5 = 158.325 cubic feet
You will need 158.3 cubic feet of concrete for this slab

To convert cubic feet to cubic yards multiply cubic feet * 0.037037037037037
To convert cubic feet to cubic metres multiply cubic feet * 0.028316846592
To convert cubic yards to cubic metres multiply cubic yards * 0.764554857984

Concrete Slab

Length ft in
Width ft in
Depth in
Square Footage of Slab ft²
Amount of Concrete Needed in:
Cubic Feet ft ³
Cubic Yards yd ³
Cubic Metres

Calculation

  1. enter the length measurement of the slab in feet and inches
  2. the width of the slab in feet and inches
  3. thickness of the slab inches

Results

  1. square footage of the slab
  2. amount of concrete needed in cubic feet
  3. concrete needed in cubic yards
  4. concrete needed in cubic metres

When Ordering Concrete

This concrete calculator will help you in estimating the amount of concrete needed for your project. The amount given as needed, does not include any waste. It is recommended, depending on the job you are doing, to add anywhere from an extra 4% to 10% to your concrete order to make sure you have enough concrete to finish the job. Ask when ordering the concrete. They will be able to give you a good idea of what is needed.


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