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Power and Energy

BTUtokJ

Convert International Table BTUs (BTU) to kilojoules (kJ).

Factor1 BTU = 1.055056 kJ

Converter

BTU

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1.05506kJ

Rendered to 6 significant figures.

Formula

Formula
kJ = BTU × 1.055056

Multiply any value in International Table BTUs by 1.055056 to obtain the value in kilojoules.

Worked example

Convert 1 BTU to kJ.

  1. 01Start with 1 BTU.
  2. 02Multiply by the conversion factor: 1 × 1.055056 = 1.05506 kJ.
Result1 BTU = 1.05506 kJ

Conversion table

BTUkJ
11.0551
22.1101
55.2753
1010.551
2021.101
5052.753
100105.51
200211.01
500527.53
10001055.1

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU to kJ?
1 BTU equals 1.055056 kJ. To convert, multiply the value in International Table BTUs by 1.055056.
How do I convert 1 BTU to kJ?
1 BTU = 1.05506 kJ. For any value, multiply by 1.055056.
How do I convert kJ back to BTU?
Divide by the same factor — or equivalently, multiply by 0.9478171. So 1 kJ = 0.947817 BTU.
When would I need to convert International Table BTU to kilojoule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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