Vertical Jump Peak Power CalculatorFree online fitness & health calculator — instant results, no sign-up
Estimate peak jump power using the Sayers countermovement jump equation.
For general information only. This is not medical advice, diagnosis, dosing guidance or a treatment recommendation. Talk to a doctor or other qualified health professional about your health, pregnancy, or diet.
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About the Vertical Jump Peak Power Calculator
The Vertical Jump Peak Power Calculator estimates peak jump power in watts from body weight and countermovement jump height using the Sayers equation. With the default inputs of 75 kg and 45 cm, it returns an estimated peak power of 4,074 W. This is a prediction of peak power during the jump, not a direct measurement.
- Body weight (kg)
- Your body mass in kilograms, with a default value of 75 kg.
- Countermovement jump height (cm)
- The vertical height achieved in a countermovement jump, measured in centimeters, with a default value of 45 cm.
Formula and method
P = 60.7 × h + 45.3 × m − 2,055; with the default inputs: P = 60.7 × 45 + 45.3 × 75 − 2,055 = 4,074 W.
- PEstimated peak jump power in watts (W).
- hCountermovement jump height in centimeters (cm).
- mBody mass entered as body weight in kilograms (kg).
The calculator multiplies jump height in centimeters by 60.7 and body mass in kilograms by 45.3, adds the two terms, and subtracts 2,055. These fixed regression coefficients require the specified units. The result is an estimate of absolute peak power in watts, rather than average power or power per kilogram.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Body weight75 kg
- Countermovement jump height45 cm
Results
- Estimated peak power4,074 W
- NoteApproximation; individual results vary.
How to use the Vertical Jump Peak Power Calculator
- 1Enter your body weight in kilograms; the default is 75 kg.
- 2Measure a countermovement jump using a consistent protocol: start upright, dip down, and immediately jump vertically.
- 3Enter the measured jump height in centimeters; the default is 45 cm.
- 4Run the calculation and read the Estimated peak power row; the default inputs produce 4,074 W.
- 5Read the approximation note and use the same measurement method and jump technique when comparing repeat tests.
Reading your result
The Estimated peak power row reports predicted peak jump power in watts: 4,074 W for 75 kg and 45 cm. A higher value indicates greater predicted absolute peak power, but body mass contributes to the estimate, so it does not necessarily indicate better jump performance or greater power relative to body size. The Note row reads “Approximation; individual results vary,” reminding you that the equation cannot capture every individual's force and movement characteristics.
Limitations
The Sayers equation is an empirical prediction, not a direct measurement of force, velocity, or power. Accuracy depends on reliable jump-height measurements and how closely the jumper and testing protocol resemble those used to develop the equation. Arm swing, countermovement technique, fatigue, and measurement equipment can affect results. Do not substitute squat-jump, drop-jump, or box-height measurements for countermovement jump height. Unusual input combinations can produce implausible or negative estimates; these should not be interpreted as meaningful physical peak power. The result is not a diagnosis or an injury-risk assessment.
Common questions
Why do 75 kg and a 45 cm jump give 4,074 W?+
The height term is 60.7 × 45 = 2,731.5, and the body-mass term is 45.3 × 75 = 3,397.5. Adding these and subtracting 2,055 gives 4,074 W.
Can I use the height of a box I jumped onto?+
No. Box height is not countermovement jump height because you can raise your feet by tucking your legs. Use a jump-height measurement from a suitable, consistently applied testing method.
Why does a heavier person get a higher estimate at the same jump height?+
The equation includes a positive body-mass term because moving more mass to the same height generally requires greater mechanical output. The displayed result is absolute power, not power normalized to body mass.
Is this equivalent to measuring peak power with a force plate?+
No. This calculator predicts peak power from only body mass and jump height. Force-plate analysis uses force-time measurements and derived velocity to assess power during the movement, so its result can differ from this estimate.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
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Results are estimates for informational purposes and are not financial, medical or legal advice.