Convert british thermal units to kilojoules
1 BTU = 1.05505585262 kJ — 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 1.05505585262e-12
- Terajoules TJ 1.05505585262e-9
- Gigajoules GJ 0.000 001 055 055 852 62
- Megajoules MJ 0.001 055 055 852 62
- Kilojoules kJ 1.055 055 852 62
- Joules J 1055.055 852 62
- Millijoules mJ 1 055 055.852 62
- Microjoules µJ 1 055 055 852.62
- Nanojoules nJ 1 055 055 852 620
- Watt-hours Wh 0.293 071 070 172
- Kilowatt-hours kWh 0.000 293 071 070 172
- Megawatt-hours MWh 0.000 000 293 071 070 172
- Gigawatt-hours GWh 2.93071070172e-10
- Terawatt-hours TWh 2.93071070172e-13
- Calorie (thermochemical)s cal 252.164 400 722
- Kilocalories kcal 0.252 164 400 722
- Calorie (IT)s cal (IT) 251.995 761 111
- Kilocalorie (IT)s kcal (IT) 0.251 995 761 111
- British thermal units BTU 1
- BTU (thermochemical)s BTU (th) 1.000 669 467 08
- Million BTUs MMBTU 0.000 001
- Therm (US)s thm 0.000 010 002 387 672 2
- Therm (EC)s thm (EC) 0.000 009 999 998 603 11
- Electronvolts eV 6.58514067819e+21
- Kiloelectronvolts keV 6.58514067819e+18
- Megaelectronvolts MeV 6 585 140 678 190 000
- Gigaelectronvolts GeV 6 585 140 678 190
- Teraelectronvolts TeV 6 585 140 678.19
- Ergs erg 10 550 558 526.2
- Foot-pounds ft·lbf 778.169 262 266
- Inch-pounds in·lbf 9338.031 147 19
- Foot-poundals ft·pdl 25 036.855 629 3
- Horsepower-hours hp·h 0.000 393 014 778 922
- Tonne of TNTs t TNT 0.000 000 252 164 400 722
- Kiloton of TNTs kt TNT 2.52164400722e-10
- Megaton of TNTs Mt TNT 2.52164400722e-13
- Hartrees Eₕ 2.41999456355e+20
- Rydbergs Ry 4.8399891271e+20
- Quads quad 1e-15
Every row is British thermal unit (BTU) converted through the joule, in exact rational arithmetic.
How to convert british thermal units to kilojoules
Multiply the number of british thermal units by 1.05505585262 to get kilojoules.
The exact factor is 1.05505585262 — as a fraction, 52752792631/50000000000.
British thermal unit: International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.
British thermal unit to Kilojoule conversion table
| British thermal units (BTU) | Kilojoules (kJ) |
|---|---|
| 1 BTU | 1.055 055 9 |
| 2 BTU | 2.110 111 7 |
| 3 BTU | 3.165 167 6 |
| 5 BTU | 5.275 279 3 |
| 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 | 1055.0559 |
Kilojoule to British thermal unit conversion table
| Kilojoules (kJ) | British thermal units (BTU) |
|---|---|
| 1 kJ | 0.947 817 12 |
| 2 kJ | 1.895 634 2 |
| 3 kJ | 2.843 451 4 |
| 5 kJ | 4.739 085 6 |
| 10 kJ | 9.478 171 2 |
| 20 kJ | 18.956 342 |
| 25 kJ | 23.695 428 |
| 50 kJ | 47.390 856 |
| 100 kJ | 94.781 712 |
| 250 kJ | 236.954 28 |
| 500 kJ | 473.908 56 |
| 1000 kJ | 947.817 12 |
Frequently asked
How many kilojoules are in a british thermal unit?
One british thermal unit equals 1.055055853 kilojoules (BTU → kJ). That figure is exact, not rounded.
How do you convert british thermal units to kilojoules?
Multiply the number of british thermal units by 1.05505585262 to get kilojoules.
What is 1 kJ in british thermal units?
One kilojoule is 0.9478171203 british thermal units.
What is 10 BTU in kJ?
10 BTU = 10.550 559 kJ.
What exactly is a british thermal unit?
International Table BTU, exactly 1055.055 852 62 J. HVAC capacity is quoted in BTU/h.