BTU / kJ

British thermal unit to Kilojoule converter

1 BTU = 1.055056 kJ

This is the British thermal unit to Kilojoule converter. The factor is fixed: 1 BTU = 1.0550558526200113 kJ. Open a common amount below, or type any value — only selected amounts are indexed.

Common values

kilojoule to BTU 2 BTUs in kilojoule 5 BTUs in kilojoule 10 BTUs in kilojoule 20 BTUs in kilojoule 25 BTUs in kilojoule 50 BTUs in kilojoule 75 BTUs in kilojoule 100 BTUs in kilojoule 120 BTUs in kilojoule 150 BTUs in kilojoule

Same amount, other units

1 BTU → kcal 1 BTU → cal 1 BTU → kWh 1 BTU → MJ

Formula: BTU to kilojoule

kJ = BTU × 1.055056 (1 BTU = 1.055056 KJ)

Reference values: BTU → kilojoule

BTU	kJ
1 BTU	1.055056 kJ
100 BTU	105.505585 kJ
200 BTU	211.011171 kJ
500 BTU	527.527926 kJ
1000 BTU	1055.055853 kJ
2000 BTU	2110.111705 kJ

Common conversions

1 BTU → 1.055056 kJ 2 BTU → 2.110112 kJ 5 BTU → 5.275279 kJ 10 BTU → 10.550559 kJ 20 BTU → 21.101117 kJ 25 BTU → 26.376396 kJ 50 BTU → 52.752793 kJ 75 BTU → 79.129189 kJ 100 BTU → 105.505585 kJ 120 BTU → 126.606702 kJ 150 BTU → 158.258378 kJ 200 BTU → 211.011171 kJ

FAQ for BTU → kJ

BTU vs kcal?

Both measure energy. Roughly 1 kcal ≈ 3.97 BTU (IT). Use the exact factor on this page.

Manual conversion?

kJ = BTU × 1.055056 (1 BTU = 1.055056 KJ)

Reverse?

1 kilojoule ≈ 0.947817 BTU.

How much is 1 BTU in kilojoule?

1.055056 kilojoule (1 BTU = 1.055056 kilojoule).

What is a BTU?

British thermal unit-energy needed to raise the temperature of water; common for AC and heating capacity ratings.

How the British thermal unit to Kilojoule converter works

This hub describes the pair, not a single number. Pages like 1, 10 or 100 British thermal unit answer exact searches.

NiftyRecipe uses thermochemical energy factors (for example 1 kcal = 4184 J). Results do not change with the time of day.