British thermal unit BTU
≈ 1055 J. HVAC in the US.
Quick convert — British thermal unit to popular units
Live converter, three directions. Type any value to update all three.
British thermal unit
joule
1 BTU = 1,055.0559J
British thermal unit
kilojoule
1 BTU = 1.0551kJ
British thermal unit
calorie
1 BTU = 252.1644cal
Conversion table — British thermal unit to every Energy unit
All values for 1 BTU (forward) and 1 reverse unit → {symbol}.
| To / From | 1 BTU = | 1 to-unit = |
|---|---|---|
| joule (J) | 1,055.05585262 J | 0.00094782 BTU |
| kilojoule (kJ) | 1.05505585 kJ | 0.94781712 BTU |
| calorie (cal) | 252.16440072 cal | 0.00396567 BTU |
| kilocalorie (kcal) | 0.2521644 kcal | 3.96566683 BTU |
| watt-hour (Wh) | 0.29307107 Wh | 3.41214163 BTU |
| kilowatt-hour (kWh) | 0.00029307 kWh | 3,412.14163313 BTU |
| electronvolt (eV) | 6.585141e+21 eV | 1.518570e-22 BTU |
| foot-pound (ft·lb) | 778.16926227 ft·lb | 0.00128507 BTU |
| therm (thm) | 1.000000e-5 thm | 100,000 BTU |
Frequently Asked Questions
What does BTU stand for?
British thermal unit (BTU) is a unit of Energy.
How many BTU are in 1 J?
1 J = 1,055.055853 BTU, so 1 BTU = 0.000948 J.
Is this the SI base unit?
No. British thermal unit is one of several units in the Energy category. The SI base is J.
Common conversions from British thermal unit
#1
British thermal unit (BTU) → joule (J)
Convert British thermal unit (BTU) to joule.
#2British thermal unit (BTU) → kilojoule (kJ)
Convert British thermal unit (BTU) to kilojoule.
#3British thermal unit (BTU) → calorie (cal)
Convert British thermal unit (BTU) to calorie.
#4British thermal unit (BTU) → kilocalorie (kcal)
Convert British thermal unit (BTU) to kilocalorie.
#5British thermal unit (BTU) → watt hour (Wh)
Convert British thermal unit (BTU) to watt hour.
#6British thermal unit (BTU) → kilowatt hour (kWh)
Convert British thermal unit (BTU) to kilowatt hour.
#7British thermal unit (BTU) → electronvolt (eV)
Convert British thermal unit (BTU) to electronvolt.
#8British thermal unit (BTU) → foot pound (ft·lb)
Convert British thermal unit (BTU) to foot pound.