Convert joules to british thermal units
1 J = 0.000947817120313 BTU — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 39 energy & work units
- Petajoules PJ 1e-15
- Terajoules TJ 1e-12
- Gigajoules GJ 1e-9
- Megajoules MJ 0.000 001
- Kilojoules kJ 0.001
- Joules J 1
- Millijoules mJ 1000
- Microjoules µJ 1 000 000
- Nanojoules nJ 1 000 000 000
- Watt-hours Wh 0.000 277 777 777 778
- Kilowatt-hours kWh 0.000 000 277 777 777 778
- Megawatt-hours MWh 2.77777777778e-10
- Gigawatt-hours GWh 2.77777777778e-13
- Terawatt-hours TWh 2.77777777778e-16
- Calorie (thermochemical)s cal 0.239 005 736 138
- Kilocalories kcal 0.000 239 005 736 138
- Calorie (IT)s cal (IT) 0.238 845 896 627
- Kilocalorie (IT)s kcal (IT) 0.000 238 845 896 627
- British thermal units BTU 0.000 947 817 120 313
- BTU (thermochemical)s BTU (th) 0.000 948 451 652 677
- Million BTUs MMBTU 9.47817120313e-10
- Therm (US)s thm 9.48043427973e-9
- Therm (EC)s thm (EC) 9.47816987913e-9
- Electronvolts eV 6.24150907446e+18
- Kiloelectronvolts keV 6 241 509 074 460 000
- Megaelectronvolts MeV 6 241 509 074 460
- Gigaelectronvolts GeV 6 241 509 074.46
- Teraelectronvolts TeV 6 241 509.074 46
- Ergs erg 10 000 000
- Foot-pounds ft·lbf 0.737 562 149 277
- Inch-pounds in·lbf 8.850 745 791 33
- Foot-poundals ft·pdl 23.730 360 404 2
- Horsepower-hours hp·h 0.000 000 372 506 135 999
- Tonne of TNTs t TNT 2.39005736138e-10
- Kiloton of TNTs kt TNT 2.39005736138e-13
- Megaton of TNTs Mt TNT 2.39005736138e-16
- Hartrees Eₕ 2.2937122784e+17
- Rydbergs Ry 4.58742455679e+17
- Quads quad 9.47817120313e-19
Every row is Joule (J) converted through the joule, in exact rational arithmetic.
How to convert joules to british thermal units
Multiply the number of joules by 0.000947817120313 to get british thermal units.
British thermal unit: International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.
Joule to British thermal unit conversion table
| Joules (J) | British thermal units (BTU) |
|---|---|
| 1 J | 0.000 947 817 12 |
| 2 J | 0.001 895 634 2 |
| 3 J | 0.002 843 451 4 |
| 5 J | 0.004 739 085 6 |
| 10 J | 0.009 478 171 2 |
| 20 J | 0.018 956 342 |
| 25 J | 0.023 695 428 |
| 50 J | 0.047 390 856 |
| 100 J | 0.094 781 712 |
| 250 J | 0.236 954 28 |
| 500 J | 0.473 908 56 |
| 1000 J | 0.947 817 12 |
British thermal unit to Joule conversion table
| British thermal units (BTU) | Joules (J) |
|---|---|
| 1 BTU | 1055.0559 |
| 2 BTU | 2110.1117 |
| 3 BTU | 3165.1676 |
| 5 BTU | 5275.2793 |
| 10 BTU | 10 550.559 |
| 20 BTU | 21 101.117 |
| 25 BTU | 26 376.396 |
| 50 BTU | 52 752.793 |
| 100 BTU | 105 505.59 |
| 250 BTU | 263 763.96 |
| 500 BTU | 527 527.93 |
| 1000 BTU | 1 055 055.9 |
Frequently asked
How many british thermal units are in a joule?
One joule equals 0.0009478171203 british thermal units (J → BTU). That figure is exact, not rounded.
How do you convert joules to british thermal units?
Multiply the number of joules by 0.000947817120313 to get british thermal units.
What is 1 BTU in joules?
One british thermal unit is 1055.055853 joules.
What is 10 J in BTU?
10 J = 0.009 478 171 2 BTU.
What exactly is a british thermal unit?
International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.