**Name of Power Unit, P** |
**Symbol** |
**Definition** |
**Relation to SI unit watt, W ** |

watt (SI unit) |
W |
≡ J/s = N·m/s |
= kg·m²/s³ |

lusec |
lusec |
≡ 1 L·µmHg/s |
≈ 1.333 224×10^{−4} W |

foot-pound-force per hour |
ft lbf/h |
≡ 1 ft lbf/h |
≈ 3.766 161×10^{−4} W |

atmospherecubic centimetre per minute |
atm ccm |
≡ 1 atm × 1 cm³/min |
= 1.688 75×10^{−3} W |

foot-pound-force per minute |
ft lbf/min |
≡ 1 ft lbf/min |
= 2.259 696 580 552 334×10^{−2} W |

atmosphere–cubiccentimetre per second |
atm ccs |
≡ 1 atm × 1 cm³/s |
= 0.101 325 W |

BTU (International Table) per hour |
BTUIT/h |
≡ 1 BTUIT/h |
≈ 0.293 071 W |

atmosphere–cubic foot per hour |
atm cfh |
≡ 1 atm × 1 cu ft/h |
= 0.797 001 244 704 W |

foot-pound-force per second |
ft lbf/s |
≡ 1 ft lbf/s |
= 1.355 817 948 331 400 W |

litre-atmosphere per minute |
L·atm/min |
≡ 1 atm × 1 L/min |
= 1.688 75 W |

calorie (International Table) per second |
calIT/s |
≡ 1 calIT/s |
= 4.1868 W |

BTU (International Table) per minute |
BTUIT/min |
≡ 1 BTUIT/min |
≈ 17.584 264 W |

atmosphere-cubic foot per minute |
atm·cfm |
≡ 1 atm × 1 cu ft/min |
= 47.820 074 682 24 W |

square foot equivalent direct radiation |
sq ft EDR |
≡ 240 BTUIT/h |
≈ 70.337 057 W |

litre-atmosphere per second |
L·atm/s |
≡ 1 atm × 1 L/s |
= 101.325 W |

horsepower (metric) |
hp |
≡ 75 m kgf/s |
= 735.498 75 W |

horsepower (European electrical) |
hp |
≡ 75 kp·m/s |
= 736 W |

horsepower (Imperial mechanical) |
hp |
≡ 550 ft lbf/s |
= 745.699 871 582 270 22 W |

horsepower (Imperial electrical) |
hp |
- |
≡ 746 W |

ton of air conditioning |
- |
≡ 1 t × 1005 J/kg × 1 °F/K ÷ 10 min |
= 844.2 W |

poncelet |
p |
≡ 100 m kgf/s |
= 980.665 W |

BTU (International Table) per second |
BTUIT/s |
≡ 1 BTUIT/s |
= 1.055 055 852 62×10^{3} W |

atmosphere-cubic foot per second |
atm cfs |
≡ 1 atm × 1 cu ft/s |
= 2.869 204 480 934 4×10^{3} W |

ton of refrigeration (IT) |
- |
≡ 1BTUIT × 1 sh tn/lb ÷ 10 min/s |
≈ 3.516 853×10^{3} W |

ton of refrigeration (Imperial) |
- |
≡ 1BTUIT × 1 lng tn/lb ÷ 10 min/s |
≈ 3.938 875×10^{3} W |

boiler horsepower |
bhp |
≈ 34.5 lb/h × 970.3 BTUIT/lb |
≈ 9.810 657×10^{3} W |