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Power and Energy

BTUtoGJ

Convert International Table BTUs (BTU) to gigajoules (GJ).

Factor1 BTU = 1.055056e-6 GJ

Converter

BTU

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

Result
1.05506GJ

Rendered to 6 significant figures.

Formula

Formula
GJ = BTU × 1.055056e-6

Multiply any value in International Table BTUs by 1.055056e-6 to obtain the value in gigajoules.

Worked example

Convert 1.00000e+6 BTU to GJ.

  1. 01Start with 1.00000e+6 BTU.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 1.055056e-6 = 1.05506 GJ.
Result1.00000e+6 BTU = 1.05506 GJ

Conversion table

BTUGJ
11.0551e-6
22.1101e-6
55.2753e-6
101.0551e-5
202.1101e-5
505.2753e-5
1000.00010551
2000.00021101
5000.00052753
10000.0010551

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU to GJ?
1 BTU equals 1.055056e-6 GJ. To convert, multiply the value in International Table BTUs by 1.055056e-6.
How do I convert 1 BTU to GJ?
1 BTU = 1.05506e-6 GJ. For any value, multiply by 1.055056e-6.
How do I convert GJ back to BTU?
Divide by the same factor — or equivalently, multiply by 947817.1. So 1 GJ = 947817 BTU.
When would I need to convert International Table BTU to gigajoule?
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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