Spike's Calculators


Rise from an Elevation Slope in a Percent

Elevation Grade from a Percentage

This calculator will calculate the height difference in elevation from a slope in a percent and a run length in metres.

Elevation Grade Slope in a Percent/Metric

Length m
Slope in a Percentage %


Difference in Height mm
Difference in Metres m


  1. run length in metres
  2. slope in a percent


  1. height difference in millimetres
  2. height difference in metres

Example calculation
a 6 metres long garage floor requires a 2% slope
6 * 2% =
6 * ( 2 ÷ 100)  =
6 * 0.02 = 0.12 m
the difference in elevation for this garage floor equals 0.12 metres = 120 millimetres

Excavation Calculators

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