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Vertical jump power calculator

Short answer

Sayers' equation turns jump height and body mass into peak power: 60.7 × jump height (cm) + 45.3 × body mass (kg) − 2,055. A 45 cm jump at 75 kg gives about 4,074 W, or 54.3 W per kg. It was cross-validated in 108 people and works for men and women alike.

Last reviewed 28 October 20261 published sourcesNot medical advice

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Vertical jump power calculator

Use your best jump height (standing reach to peak reach) and your body weight.

Units
cm
kg

Enter your jump height and body weight.

Runs entirely in your browser. Nothing you type is saved or sent anywhere.

Estimated peak power (W) by jump height and body weight
Jump height60 kg75 kg90 kg
30 cm (11.8 in)2,4843,1643,843
40 cm (15.7 in)3,0913,7714,450
50 cm (19.7 in)3,6984,3785,057
60 cm (23.6 in)4,3054,9855,664
70 cm (27.6 in)4,9125,5926,271
Worked out with the Sayers et al. (1999) equation.

The Sayers equation

Peak power (W) = 60.7 × jump height (cm) + 45.3 × body mass (kg) − 2,055. Sayers et al. derived it from squat jumps in 108 people; it underestimated measured peak power by less than 1% (Sayers et al., 1999).

Using countermovement jump heights in the same equation overestimated power by only 2.7%, and the authors found separate equations for men and women unnecessary. They recommend it in place of the older Harman and Lewis formulas (Sayers et al., 1999).

Power in context

Jump power reflects explosive strength, while the one-rep max calculator estimates maximal strength. Cyclists can compare sustained power with the FTP calculator.

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Common questions

How do I measure my vertical jump?

Stand side-on to a wall and mark your standing reach, then jump as high as you can and mark the highest point you touch. The difference is your jump height. Use your best of a few attempts.

Should I use a squat jump or a countermovement jump?

Sayers built the equation from squat jumps (starting from a held squat). Using a countermovement jump height in it overestimated peak power by only 2.7%, so either works.

Why not use the Harman equation?

Sayers et al. cross-validated three jump power equations, including Harman's and Lewis's, against measured power in 108 people, and concluded their equation should be used in place of both.

Sources

Figures on this page were checked against these publications on 28 October 2026.

  1. Sayers SP, Harackiewicz DV, Harman EA, Frykman PN, Rosenstein MT. Cross-validation of three jump power equations. Medicine & Science in Sports & Exercise. 1999;31(4):572–577. doi.org/10.1097/00005768-199904000-00013

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