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A simple mechanical power formula was devised for both peak and average power using a countermovement jump and reach test from a force platform. College athletes (49 F, 69 M) were measured for height, weight, thigh circumference, thigh skinfold, thigh length, and foreleg length. A Vertec was used to measure vertical jump height, and the force platform was used to help determine power output. Eight anthropometric measurements, vertical jump height, and gender were used in a stepwise multiple regression to develop the prediction equations. Gender was not significant (p > 0.05) and therefore was not loaded into either equation. Estimated and actual peak power values were 4,707 ± 1,511 and 4,687 ± 1,612 watts, respectively. Estimated average and actual average power values were 2,547 ± 760 and 2,463 ± 753 watts, respectively. Vertical jump height, mass, and body height were the significant variables selected by the stepwise multiple regression to predict both peak and average mechanical power, accounting for 91 and 82% of the variance in peak and average power output, respectively. This indicates they are good predictors of peak and average power output in college athletes.