British thermal units to Kilojoules Converter

1 British thermal unit (BTU) equals 1.05505585262 kilojoules (kJ).

Quick answer

  • 1 British thermal unit = 1.055055853 kilojoules
  • 1 kilojoule = 0.9478171203 British thermal units
  • Formula: kJ = BTU × 1.05505585262

1 British thermal unit = 1.055055853 kilojoules

How to convert British thermal units to kilojoules

kJ = BTU × 1.05505585262

To convert British thermal units to kilojoules, multiply the number of British thermal units by 1.05505585262.

Example: 42 BTU to kJ

  1. Start with the value in British thermal units: 42 BTU.
  2. Multiply by 1.05505585262: 42 × 1.05505585262 = 44.31234581.
  3. Result: 42 British thermal units = 44.31234581 kilojoules.

Going the other way, 1 kilojoule = 0.947817120313 British thermal units, so to convert kilojoules back to British thermal units you divide by the same number. See kilojoules to British thermal units.

British thermal units to kilojoules conversion table

British thermal units (BTU)Kilojoules (kJ)
0.1 BTU 0.1055055853 kJ
0.2 BTU 0.2110111705 kJ
0.3 BTU 0.3165167558 kJ
0.4 BTU 0.422022341 kJ
0.5 BTU 0.5275279263 kJ
0.6 BTU 0.6330335116 kJ
0.7 BTU 0.7385390968 kJ
0.8 BTU 0.8440446821 kJ
0.9 BTU 0.9495502674 kJ
1 BTU 1.055055853 kJ
1.5 BTU 1.582583779 kJ
2 BTU 2.110111705 kJ
2.5 BTU 2.637639632 kJ
3 BTU 3.165167558 kJ
3.5 BTU 3.692695484 kJ
4 BTU 4.22022341 kJ
4.5 BTU 4.747751337 kJ
5 BTU 5.275279263 kJ
6 BTU 6.330335116 kJ
7 BTU 7.385390968 kJ
7.5 BTU 7.912918895 kJ
8 BTU 8.440446821 kJ
9 BTU 9.495502674 kJ
10 BTU 10.55055853 kJ
11 BTU 11.60561438 kJ
12 BTU 12.66067023 kJ
13 BTU 13.71572608 kJ
14 BTU 14.77078194 kJ
15 BTU 15.82583779 kJ
16 BTU 16.88089364 kJ
17 BTU 17.93594949 kJ
18 BTU 18.99100535 kJ
19 BTU 20.0460612 kJ
20 BTU 21.10111705 kJ
21 BTU 22.15617291 kJ
22 BTU 23.21122876 kJ
23 BTU 24.26628461 kJ
24 BTU 25.32134046 kJ
25 BTU 26.37639632 kJ
26 BTU 27.43145217 kJ

More BTU to kJ values

What is a British thermal unit?

The British thermal unit is the energy needed to raise the temperature of one pound of water by one degree Fahrenheit, about 1,055 joules.

More about British thermal units →

What is a kilojoule?

The kilojoule is 1,000 joules. It is the unit of food energy on labels in Australia, New Zealand and the EU (alongside kcal), and a common unit in chemistry.

More about kilojoules →

Convert British thermal units to other units

Convert other units to kilojoules

Frequently asked questions

How many kilojoules are in a British thermal unit?

One British thermal unit is 1.055055853 kilojoules.

How many British thermal units are in a kilojoule?

One kilojoule is 0.9478171203 British thermal units.

What is the formula to convert British thermal units to kilojoules?

kJ = BTU × 1.05505585262.