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Relative Peak Power (W/kg) Calculator

Compare your power relative to your weight.

How it is calculated

Relative peak power is the peak power output divided by body mass.

Prel = P ÷ m

P is the peak power in watts (W) and m is body weight in kilograms (kg); the result is in watts per kilogram (W/kg), rounded to 2 decimals. Power must be zero or more and body weight must be greater than zero. A power of 0 returns 0.00, while a negative power or a weight of 0 gives no result. The tool only divides: it does not check how the peak power was measured, so a jump-test peak, a cycling sprint and a Wingate peak are not comparable with each other.

Worked example

An athlete produces a peak power of 1050 W in a test and weighs 72 kg. Divide: 1050 ÷ 72 ≈ 14.5833. Rounded to two decimals, the relative peak power is 14.58 W/kg. At the same power, a 80 kg athlete would score 1050 ÷ 80 = 13.13 W/kg, showing why raw watts alone favour heavier athletes.

Try this example →

Common mistakes

  • Entering body weight in pounds. The field expects kilograms, so 160 lb must be converted to about 72.6 kg first.
  • Dividing average power by weight and comparing it with a peak-power benchmark. The two are different measures with very different values.
  • Entering power in kilowatts (1.05) instead of watts (1050).
  • Comparing W/kg from different test types, for example a vertical jump estimate against a cycling sprint. Each test has its own normal range.
  • Using total weight including equipment or a loaded bar when the benchmark is based on body weight alone.

About this calculator

Relative peak power divides an athlete’s peak power output — measured in watts, typically from a force plate, cycling power meter, or Wingate anaerobic test — by their body weight in kilograms, giving a watts-per-kilogram (W/kg) figure that lets you compare explosive power output between athletes of different sizes, since raw watts alone favor heavier athletes.

Strength and conditioning coaches use W/kg from vertical jump or sprint testing to track an athlete’s power development relative to their own bodyweight over a training cycle, and it’s a standard metric in cycling, where sprint and short-effort power-to-weight ratios help predict performance on climbs and in sprints far better than absolute watts do. Sports scientists reference published W/kg benchmarks to compare athletes against normative data for their sport and level.

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