# Power generation by the human body

• If power is like the strength of a weightlifter, energy is like his endurance. Energy is a measure of how long we can sustain the output of power, or how much work we can do. Power is the rate at which we do the work
• One common unit of energy is the kilowatt-hour (kWh). If we are using one kW of power, a kWh of energy will last one hour. If we use 10 kW of power, we will use up the kWh in just six minutes.
```  BTU is the amount of energy needed to raise the temperature of 1 pound of water 1 degree F
1 horsepower is equivalent to 746 watts
One BTU is equal to 1,055 joules, or 252 gram-calories or 0.252 food Calories.
Btu x 0.293 = W  ( kW x 3414 = Btu )
One watt is equal to 1 Newton-meter per second (Nm/s).
```
• Measure your power output by running up a flight of stairs. Power (W) = (height of stairs (m) / Time to climb (s) ) * weight (N)
• 1hp = 746watt • 201309 - Converted exercise bike http://www.youtube.com/watch?v=mghM1gpQUyE

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vigor: eco/humanpower (last edited 2013-09-14 19:24:24 by PieterSmit)

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