### Convert common energy (power) units to joules (watts) with the following table.

Find the units of your energy (power) in the left column, and then use the multiplier in the right column
with the amount of energy (power) you have in those units to determine how many equivalent joules (watts) there
are. (Remember, 1 joule/second = 1 watt.) For instance, if you have 10 therms, use 105,500,000 as the multiplier to get 1,055,000,000 joule, or 1.055 GJ (G = giga; J = joule).

1 kilowatt-hour (kwh) |
3.6*10^{6} joules |

1 British thermal unit (Btu) |
1,055 joules |

1 therm (= 100,000 Btu) |
105.5*10^{6} joules |

1 erg |
0.1*10^{-6} joules |

1 calorie (thermochemical) |
4.184 joules |

1 Calorie (food calorie) |
4,187 joules |

1 quad |
1.055*10^{18} joules |

1 amp-hour-volt |
3,600 joules |

1 horsepower (hp) |
745.7 watts |

1 Btu/hour |
0.2931 watts |

1 ft-lb/sec |
1.356 watts |