How to convert British thermal units to joules
To convert British thermal units (BTU) to joules (J), multiply the value in British thermal units by 1,055.05585262.
J = BTU × 1,055.05585262
Example: 5 BTU = 5,275.279263 J.
You can also type 5 BTU to J into the smart calculator, or mix units: 1 BTU + 1 J.
British Thermal Units to Joules conversion table
| British Thermal Units | Joules |
|---|---|
| 0.01 BTU | 10.550559 J |
| 0.1 BTU | 105.50559 J |
| 0.25 BTU | 263.76396 J |
| 0.5 BTU | 527.52793 J |
| 1 BTU | 1,055.0559 J |
| 2 BTU | 2,110.1117 J |
| 3 BTU | 3,165.1676 J |
| 4 BTU | 4,220.2234 J |
| 5 BTU | 5,275.2793 J |
| 6 BTU | 6,330.3351 J |
| 7 BTU | 7,385.391 J |
| 8 BTU | 8,440.4468 J |
| 9 BTU | 9,495.5027 J |
| 10 BTU | 10,550.559 J |
| 12 BTU | 12,660.67 J |
| 15 BTU | 15,825.838 J |
| 20 BTU | 21,101.117 J |
| 25 BTU | 26,376.396 J |
| 30 BTU | 31,651.676 J |
| 40 BTU | 42,202.234 J |
| 50 BTU | 52,752.793 J |
| 60 BTU | 63,303.351 J |
| 75 BTU | 79,129.189 J |
| 100 BTU | 105,505.59 J |
| 250 BTU | 263,763.96 J |
| 500 BTU | 527,527.93 J |
| 1,000 BTU | 1,055,055.9 J |
Converting joules back to British thermal units
1 J = 0.0009478171203 BTU. See the Joules to British Thermal Units converter, or press the swap button above.
About the units
British thermal unit (BTU)
About 1,055 joules (International Table value), used for heating and cooling.
Joule (J)
The SI unit of energy: one newton acting over one meter.
Energy is the capacity to do work. The SI unit is the joule. Food energy is labelled in kilocalories (Calories with a capital C) or kilojoules, electricity is billed in kilowatt-hours, and heating often uses BTU or therms.
Questions and answers
How many joules are in a British thermal unit?
One British thermal unit (BTU) equals 1,055.055853 joules (J).
How do I convert British thermal units to joules?
To convert British thermal units to joules, multiply the value in British thermal units by 1,055.05585262. The formula is J = BTU × 1,055.05585262. For example, 5 BTU = 5,275.2793 J.
What is 5 BTU in J?
5 British thermal units is 5,275.279263 joules.
Which is bigger, a British thermal unit or a joule?
A British thermal unit is bigger: 1 BTU = 1,055.055853 J.
Are Calories on food labels the same as calories?
No. The food Calorie (capital C) is a kilocalorie: 1,000 small calories, or 4.184 kilojoules.
Does this BTU to J converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.