Impact Energy Calculator

Your details

Kinetic mode uses E = 0.5mv^2. Drop mode uses E = mgh (potential energy at release height). Pendulum mode uses the standard absorbed-energy formula E = mgR(cos beta - cos alpha).
Mass of the moving object.
kg
Speed of the object at the moment of impact.
m/s
Distance over which the impact force acts (e.g. crumple zone, cushion depth). Leave at 0 to skip average force calculation.
m
Impact energy
100J

Total kinetic or absorbed energy at the moment of impact

Impact energy (kJ)0.1kJ
Impact energy (ft-lb)73.756ft-lb
Impact velocity10m/s
100 J
Very low<10Low10-100Moderate100-300High300-700Very high700+

Impact energy: 100.00 J (73.76 ft-lb)

  • Impacts in this range are comparable to a heavy tool dropped from several metres, or a vehicle collision at low speed.
  • Impact energy is also 73.76 ft-lb, a common unit in materials testing and US engineering standards.

Next stepEnter a stopping distance above to calculate the average impact force and estimate peak load.

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