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Circular Slab Concrete Calculator -Metric Measurements

Calculate the amount of concrete needed using metric measurements for pouring a circular slab.

To calculate the cubic volume of concrete needed you need to know the diameter of the circle in metres and the required depth of the slab in millimetres

Calculator For Circular Slab

Formula's used:

A = π * D² ÷ 4
where A is the area in square metres, π = 3.14159265358979, D = diameter of circle

P = π * D
where P is the perimeter in metres, π = 3.14159265358979, D = diameter of circle

V = π * D ÷ 4 * (d ÷ 1000)
where V is the volume in cubic metres, π = 3.14159265358979, D = diameter of circle, d = depth of slab in millimetres converted into metres

Example calculation for volume:
Diameter of slab = 24.6 metres
depth of slab = 100 millimetres
3.14159265358979 * 24.6 * 24.6 ÷ 4 * (0.1)
475.29 * 0.1 =  47.529 cubic metres of concrete needed for this circular slab
To convert cubic metres to cubic yards multiply cubic metres * 1.30795061931439
To convert cubic metres to cubic feet multiply cubic metres * 35.3146667214886

Circular Concrete Slab - Metric

Diameter m
Depth mm
Area of Slab
Perimeter of Slab m
Amount of Concrete Needed in:
Cubic Metres
Cubic Yards yd³
Cubic Feet ft³


  1. enter the diameter of the slab in metres
  2. slab depth in millimetres


  1. area of slab in square metres
  2. perimeter of slab
  3. concrete needed in cubic metres
  4. concrete needed in cubic yards
  5. concrete needed in cubic feet

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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