To Convert: Into: Multiply By:
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btu btu (IST) 0.999346
btu btu (mean) 0.998563
btu btu (39°F) 0.994982
btu btu (60°F) 0.999689
btu cal., gm. 251.99576
btu cal., gm. (IST) 251.831
btu cal., gm. (mean) 251.634
btu cal., gm. (20°C) 252.122
btu cubic cm.-atmosphere 10405.6
btu ergs 1.05435 X 10^10
btu foot poundals 25020.1
btu foot-pounds 777.649
btu gram-cm. 1.07514 X 10^7
btu horsepower-hours 0.000392752
btu horsepower-years 4.48347 X 10^-8
btu joules 1054.35
btu joules (international) 1054.18
btu kilogram-calories 0.2520
btu kilogram-meters 107.514
btu kilowatt-hours 0.000292875
btu kilowatt-hours (internat'l) 0.000292827
btu liter-atm. 10.4053
btu tons refrigeration (US std) 3.46995 X 10^-8
btu watt-seconds 1054.35
btu watt-seconds (international) 1054.18