Skip to content
RK Calculator
Menu

Kilojoules to British Thermal Units Converter

Convert kilojoules (kJ) to British thermal units (IT) (Btu), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.947817120313 Btu
joules (watt-seconds)
1,000 J
megajoules
0.001 MJ
gigajoules
1 × 10⁻⁶ GJ
calories (thermochemical)
239.005736138 cal
kilocalories (food Calories)
0.239005736138 kcal
megacalories
0.000239005736138 Mcal
watt-hours
0.277777777778 Wh
kilowatt-hours
0.000277777777778 kWh
megawatt-hours
2.77777777778 × 10⁻⁷ MWh
million Btu
9.47817120313 × 10⁻⁷ MMBtu
therms (100,000 Btu)
9.47817120313 × 10⁻⁶ thm
quads (10¹⁵ Btu)
9.47817120313 × 10⁻¹⁶ quad
electronvolts
6.24150907446 × 10²¹ eV
kiloelectronvolts
6.24150907446 × 10¹⁸ keV
megaelectronvolts
6.24150907446 × 10¹⁵ MeV

1 kJ = 0.947817120313 Btu

Show the working
  1. 1 kJ = 0.947817120313 Btu
  2. 1 × 0.947817120313 = 0.947817120313 Btu

How to convert kilojoules to british thermal units

1 kJ = 0.947817120313 Btu, so multiply by 0.947817120313 to go from kilojoules to British thermal units (IT). Going the other way, 1 Btu = 1.05505585262 kJ.

Btu = kJ × 0.947817120313
kJ = Btu × 1.05505585262

Worked example:

1 kJ = 0.947817120313 Btu
5 × 0.947817120313 = 4.73908560157 Btu

Kilojoules to british thermal units table

KilojoulesBritish Thermal Units
1 kJ0.947817120313 Btu
2 kJ1.89563424063 Btu
3 kJ2.84345136094 Btu
4 kJ3.79126848125 Btu
5 kJ4.73908560157 Btu
6 kJ5.68690272188 Btu
7 kJ6.63471984219 Btu
8 kJ7.58253696251 Btu
9 kJ8.53035408282 Btu
10 kJ9.47817120313 Btu
15 kJ14.2172568047 Btu
20 kJ18.9563424063 Btu
25 kJ23.6954280078 Btu
30 kJ28.4345136094 Btu
40 kJ37.9126848125 Btu
50 kJ47.3908560157 Btu
75 kJ71.0862840235 Btu
100 kJ94.7817120313 Btu
250 kJ236.954280078 Btu
500 kJ473.908560157 Btu
1000 kJ947.817120313 Btu

About the units

British Thermal Units (Btu)
British thermal units (IT), a US customary unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed