Spike's Calculators

Concrete Steps - Metric


Calculate the amount of concrete needed for stairs on a slope between two elevations. The volume is calculated from the stair riser, the run and the throat depth of the stairs. The number of risers equals the number of steps. This calculator uses millimetres for measurements.

the number of steps equals the number of risers!

Concrete Steps - Millimetres

Number of Steps  #
Rise mm
Run mm
Throat Depth of Stairs mm
Width of Stairs mm
Total Rise mm
Total Run mm
Stair Slope °
Amount of Concrete Needed
Cubic Meters
Cubic Feet ft³
Cubic Yards yd³


  1. enter the number of steps
  2. the riser height of the step in millimetres
  3. the run of the step in millimetres
  4. the thickness of the throat in millimetres
  5. the width of the stairs in millimetres


  1. the total rise of the stairs in millimetres
  2. total run of the stairs millimetres
  3. the slope of the stairs in degrees
  4. the amount of concrete needed in cubic metres
  5. in cubic feet
  6. in cubic yards

one cubic millimetre (mm³) = 0.000000001 cubic metres (m³)
one cubic millimetre (mm³) = 0.0000000353146667214886 cubic feet (ft³)
one cubic millimetre (mm³) = 0.00000000130795061931439 cubic yards (yd³)

To convert cubic metres to cubic feet, multiply cubic metres by 35.3146667214886 
To convert cubic metres to cubic yards, multiply cubic metres by 1.30795061931439

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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