A watt is the SI unit for power. A watt is equal to 1 Joule per second [math]1 \frac{J}{s}[/math], or [math]1 \frac{kgm^{2}}{s^{3}}[/math] (energy in an amount of time).[1] A watt of power is about equivalent to a person holding out their arm and moving their fist up and down each second.

Deep knee bends output about 100 W of power. This is about the average total power input of a person over a normal day, which is why R. Buckminster Fuller came up with the idea of this calling this an energy servant. Since it's actually a unit of power, this site discusses them as power servant.[2]

The average power use (end use rather than primary), for a typical person in Canada or the USA, taken over the course of a day, is about 10,000 W.


For Further Reading

For more information on the watt, click here.


  1. RapidTables. (2014). Watt [Online]. Available: http://www.rapidtables.com/electric/watt.htm [February 20, 2015].
  2. R. Buckminster Fuller. (1940). World Energy [Online]. Available: http://www.fulltable.com/vts/f/fortune/xb/50.jpg