Belowis a table that may assist with some of the more comonly used factors in the airconditioning and refrigeration industries.
| These units multiplied by ...... | ..this factor will... | ..convert to these units. | | Btu | 1.06E+10 | ergs | | Btu | 778.3 | foot-lbs | | Btu | 252 | gram-calories | | Btu | 0.0003931 | horsepower-hrs | | Btu (39 ºF) | 1059.67 | joules (J) | | Btu (59 ºF) | 1054.8 | joules | | Btu (60 ºF) | 1054.68 | joules | | Btu (international table) | 1055.056 | joules | | Btu (thermochemical) | 1054.35 | joules | | Btu | 0.252 | kilogram-calories | | Btu | 107.5 | kilogram-metres | | Btu | 0.0002928 | kilowatt-hrs | | Btu /hr | 0.2162 | foot-pounds/sec | | Btu /hr | 0.07 | gram-cal/sec | | Btu /hr | 0.0003929 | horsepower-hrs | | Btu (int)/hr | 0.2930711 | watts | | Btu (thermo)/hr | 0.2928751 | watts | | Btu /min | 12.96 | foot-lbs/sec | | Btu /min | 0.02356 | horsepower | | Btu /min | 0.01757 | kilowatts | | Btu(thermo)/min | 17.5725 | watts | | Btu (int)/sec | 1055.056 | watts | | Btu (thermo)/sec | 1054.35 | watts | | Btu (thermo) /sq. ft. min | 189.1489 | watts /sq. metre | | Btu (int) /sq. ft. sec | 11356.53 | watts /sq. metre | | Btu (thermo) /sq. ft. sec | 11348.93 | watts /sq. metre | | Btu (thermo) /sq. in. sec | 1.634246E+06 | watts /sq. metre | | Btu (int) ft./hr sq.ft. ºF | 1.730735 | watt per metre kelvin | | Btu (thermo) ft./hr sq.ft. ºF | 1.729577 | watt per metre kelvin | | Btu (int) in /hr sq.ft. ºF | 0.1442279 | watt per metre kelvin | | Btu (thermo) in./hr sq.ft. ºF | 0.1441314 | watt per metre kelvin | | Btu (int) in /sec sq.ft. ºF | 519.2204 | watt per metre kelvin | | Btu (thermo) in./hr sq.ft. ºF | 518.8732 | watt per metre kelvin | | Btu (int) per cu. ft. | 37258.95 | joule per cu. metre | | Btu (thermo) per cu. ft. | 37234.03 | joule per cu. metre | | Btu (int) per ºF | 1899.101 | joule per kelvin | | Btu (thermo) per ºF | 1897.83 | joule per kelvin | | Btu (int) per ºRankine | 1899.101 | joule per kelvin | | Btu (thermo) per ºR | 1897.83 | joule per kelvin | | Btu (int /cu.ft. ºF | 67066.07 | joule per cu. metre kelvin | | Btu (int) /hr sq.ft. ºF | 5.678263 | watt per sq. metre kelvin | | Btu (thermo) /hr sq.ft. ºF | 5.674466 | watt per sq. metre kelvin | | Btu (int) /sec sq.ft. ºF | 20441.75 | watt per sq. metre kelvin | | Btu (thermo) /sec sq.ft. ºF | 20428.08 | watt per sq. metre kelvin | | Btu (int) /lb | 2326 | joule per kg. | | Btu (thermo) /lb | 2324.444 | joule per kg. | | Btu (int) /lb | 0.64616 | watts per kilogram | | Btu (int) /lb | 0.55498 | kilocalorie per kilogram | | Btu (int) /lb. ºF | 4186.8 | joul per kg kelvin | | Btu (thermo) /lb. ºF | 4184 | joul per kg kelvin | | Btu (int) /lb. ºRankine | 4186.8 | joul per kg kelvin | | Btu (thermo) /lb. ºR | 4184 | joul per kg kelvin | | Btu (int) /sq. ft | 11356.53 | joul per sq. metre | | Btu (thermo) /sq. ft. | 11348.93 | joul per sq. metre | | Btu (int) /sq. ft. hr | 3.154591 | watt per sq. metre | | Btu (thermo) /sq. ft. hr | 3.152481 | watt per sq. metre | | ~~~~ | ~~~~ | ~~~~ | | calorie, gram (mean) | 0.00396832 | Btu (mean) | | ~~~~ | ~~~~ | ~~~~ | | ergs | 9.48E-11 | Btu | | ergs/sec | 5.69E-06 | Btu/min | | ~~~~ | ~~~~ | ~~~~ | | foot-pounds | 0.001286 | Btu | | foot-pounds/min | 0.001286 | Btu/min | | foot-pounds/sec | 4.6263 | Btu/hr | | foot-pounds/sec | 0.07717 | Btu/min | | ~~~~ | ~~~~ | ~~~~ | | gram-calories | 0.0039683 | Btu | | gram-calories/sec | 14.286 | Btu/hr | | gram-calories | 9.30E-08 | Btu | | ~~~~ | ~~~~ | ~~~~ | | horsepower | 42.44 | Btu/min | | horsepower (boiler) | 33479 | Btu/hr | | horsepower-hrs | 2547 | Btu | | ~~~~ | ~~~~ | ~~~~ | | joules | 9.48E-04 | Btu | | ~~~~ | ~~~~ | ~~~~ | | kilogram-calories | 3.968 | Btu | | kilogram-metres | 9.29E-03 | Btu | | kilowatts | 56.92 | Btu/min | | kilowatt-hrs | 3413 | Btu | | ~~~~ | ~~~~ | ~~~~ | | tons refrigeration | 12000 | Btu per hour | | ~~~~ | ~~~~ | ~~~~ | | watts | 3.4129 | Btu/hr | | watts | 0.05688 | Btu/min | | watts (absolute) | 0.056884 | Btu (mean)/min | | watt-hours | 3.413 | Btu |
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