Gigajoules to million BTU
Type a value in gigajoules to see it in million BTU straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the gigajoules box.
- Read the result in million BTU as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
MMBtu = GJ × 0.9478171203
Multiply the value in gigajoules by 0.9478171203 to get million BTU.
Example
To convert 25 GJ to million BTU: 25 × 0.9478171203 = 23.6954 MMBtu.
Conversion table
| Gigajoules (GJ) | Million BTU (MMBtu) |
|---|---|
| 1 | 0.947817 |
| 2 | 1.89563 |
| 3 | 2.84345 |
| 5 | 4.73909 |
| 10 | 9.47817 |
| 20 | 18.9563 |
| 25 | 23.6954 |
| 50 | 47.3909 |
| 100 | 94.7817 |
| 250 | 236.954 |
| 500 | 473.909 |
| 1,000 | 947.817 |
About the units
- Gigajoule
- Exactly one billion joules, used in natural gas pricing and energy statistics.
- Million BTU
- One million International Table BTU, 1,055,055,852.62 joules. It is the pricing unit for natural gas in world markets.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many million BTU are in one gigajoule?
1 GJ = 0.947817 MMBtu exactly.
How do I convert gigajoules to million BTU?
Use MMBtu = GJ × 0.9478171203. For example, 25 GJ = 23.6954 MMBtu.
How many gigajoules are in one million BTU?
1 MMBtu = 1.05506 GJ.
Which calorie do these converters use?
The thermochemical calorie, exactly 4.184 joules, the factor many countries use to turn kcal into kJ on food labels. The International Table calorie is 4.1868 joules, less than 0.07% larger.
What is the difference between kW and kWh?
A kilowatt is a unit of power, the rate of using energy, while a kilowatt-hour is an amount of energy. A 2 kW heater running for three hours uses 6 kWh.