Convert Joules to British Thermal Units
J to BTU · energy conversion
What are joules and british thermal units?
The joule is the SI unit of energy, the work done by one newton acting over one meter. A British thermal unit is the energy to heat one pound of water by 1 °F, used for heating and AC. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert joules to british thermal units
1 J = 0.000947817 BTU. To convert, multiply the number of joules by 0.000947817. For example, 5 J = 0.00473908 BTU, and 20 J = 0.0189563 BTU. To go the other way, multiply british thermal units by 1,055.06 (since 1 BTU = 1,055.06 J).
Joules to British Thermal Units conversion table
| Joules (J) | British Thermal Units (BTU) |
|---|---|
| 1 | 0.000947817 |
| 10 | 0.00947817 |
| 100 | 0.0947817 |
| 500 | 0.473908 |
| 1,000 | 0.947817 |
| 2,000 | 1.89563 |
| 5,000 | 4.73908 |
FAQ
What is 1 J in BTU?
1 J = 0.000947817 BTU. To convert any amount, multiply the number of joules by 0.000947817.
How do I convert british thermal units back to joules?
Go the other way: 1 BTU = 1,055.06 J, so multiply british thermal units by 1,055.06 to get joules.
Is a joule bigger than a british thermal unit?
No — 1 J is the smaller unit, equal to 0.000947817 BTU (it takes 1,055.06 J to make one BTU).
Are these energy conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.