Spike's Calculators

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!

- enter the number of steps
- the riser height of the step in millimetres
- the run of the step in millimetres
- the thickness of the throat in millimetres
- the width of the stairs in millimetres

- the total rise of the stairs in millimetres
- total run of the stairs millimetres
- the slope of the stairs in degrees
- the amount of concrete needed in cubic metres
- in cubic feet
- 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