For example, a Porsche generates 480 of torque at 2,500RPM. Expressed in terms of the equation, that is (2500 * 480), which equals 1,200,000.

Convert the efficiency into a decimal before calculating. For example, a 82% efficiency would equal . 82.

If your ruler uses meters, multiply the height by 3. 28 to convert the measurement into feet. [6] X Research source

For example, if you weigh 180 lbs, and climb a 12-foot staircase in 4 seconds, that equals ((180 * . 454) * 9. 81 * (12 * . 3048)) / 4 = 733 watts.