Vertical Jump Power Calculator

Sample inputs and outputs to help you verify calculations.

1. Enter body mass and select the correct unit.
2. Choose a jump input mode and provide the measurements.
3. Select a power model for peak or average estimates.
4. If using work-based power, enter takeoff time.
5. Click Calculate to view results above the form.

Power output benchmarks in jumping sports

Peak power values from field equations commonly fall between 3,000–7,000 W for trained adults, depending on body mass and jump height. Relative power often ranges from 40–80 W/kg, helping compare athletes across weight classes in basketball, volleyball, and sprint events.

How jump height influences estimated watts

Because both Sayers and Harman equations scale linearly with jump height in centimeters, adding 5 cm typically raises the estimate by roughly 300 W. This makes small technique gains meaningful: repeated tests can reveal performance trends even when body mass stays stable. For monitoring, a coefficient of variation under 5% is a target.

Why model choice changes the number

Different datasets and protocols produced different coefficients. Harman generally yields higher watt values at moderate-to-high jump heights, while Sayers can be lower for lighter athletes. Use one model consistently for monitoring; switch models only when comparing to specific team norms or research. When reporting, note the model, jump method, and units to avoid misinterpretation.

Interpreting work and average power

The work method uses Work = m·g·h and divides by takeoff time, so it estimates average concentric power during the push-off. Typical takeoff times of 0.25–0.40 s can produce 800–2,500 W averages. It is not a peak-power substitute. If you capture force-plate time, this view can align better with training cues about fast intent.

Testing quality and measurement error

Measurement noise matters. A reach test can vary with shoulder position, and flight-time estimates assume equal takeoff and landing heights. Use consistent footwear, warm-up, and surface. Record three trials and use the best or the average to reduce random error.

Using results for training decisions

If watts rise while jump height is flat, improved mass-normalized power may still indicate better force-velocity capability. If jump height rises but watts fall, body mass changes may be driving the shift. Pair this calculator with strength and sprint metrics to plan programming blocks. A simple rule: pursue higher W/kg in speed blocks and higher jump height in peaking phases.