Online Tool Store
Vertical Jump Power Calculator
Estimate peak and average leg power from vertical jump height and body mass using the established Sayers and Lewis equations.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Health & Fitness
Vertical Jump Power Calculator
Frontend preview — no upload or external service.
Power estimate
A 54 cm jump at 78 kg gives a Sayers peak power of about 4,500 watts and a Lewis average power near 1,200 watts.
How the Vertical Jump Power Calculator works
- Measure jump height consistently — reach-and-jump and jump-mat figures are not interchangeable.
- Enter body mass in kilograms, since power scales directly with it.
- Track the trend across sessions rather than comparing a single figure with published tables.
The method
Peak power is estimated from jump height and body mass, because both the height reached and the mass moved determine the work done.
Sayers: peak power (W) = 60.7 x jump height (cm) + 45.3 x mass (kg) - 2055
A 54 cm jump at 78 kg: 60.7 x 54 + 45.3 x 78 - 2055 ≈ 4,495 watts.
FAQ
Which measurement method should I use?
Whichever you can repeat exactly. A jump mat measures flight time, a reach test measures displacement, and they produce different heights for the same jump — so never mix them in one log.
Is a higher jump always more power?
Not across people. A heavier athlete jumping slightly lower can be producing more power, which is exactly why mass is in the equation.
How accurate are these estimates?
They are regression equations fitted to test populations, so expect a margin of error against force-plate measurement. They are reliable for tracking change, less so as absolute values.
How we compare
| Feature | Online Tool Store | A paper log | A subscription health app |
|---|---|---|---|
| Named equations shown | ✓ | ✗ | ✓ |
| Peak and average power | ✓ | Manual | ✓ |
| No lab equipment | ✓ | ✓ | ✗ |
| Force-plate accuracy | ✗ | ✗ | ✓ |
Vertical Jump Power Calculator is for tracking change with a consistent method — the absolute watts depend heavily on how the height was measured.