British thermal units to million BTU
Type a value in British thermal units 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 British thermal units 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 = BTU × 0.000001
Multiply the value in British thermal units by 0.000001 to get million BTU.
Example
To convert 25 BTU to million BTU: 25 × 0.000001 = 0.000025 MMBtu.
Conversion table
| British thermal units (BTU) | Million BTU (MMBtu) |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 5 | 0.000005 |
| 10 | 0.00001 |
| 20 | 0.00002 |
| 25 | 0.000025 |
| 50 | 0.00005 |
| 100 | 0.0001 |
| 250 | 0.00025 |
| 500 | 0.0005 |
| 1,000 | 0.001 |
About the units
- British thermal unit
- The imperial unit of heat, using the International Table definition of exactly 1055.05585262 joules. Seen in air conditioner and heater ratings.
- 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 British thermal unit?
1 BTU = 0.000001 MMBtu exactly.
How do I convert British thermal units to million BTU?
Use MMBtu = BTU × 0.000001. For example, 25 BTU = 0.000025 MMBtu.
How many British thermal units are in one million BTU?
1 MMBtu = 1,000,000 BTU.
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.