Convert British Thermal Units to Joules
BTU to J · energy conversion
What are british thermal units and joules?
A British thermal unit is the energy to heat one pound of water by 1 °F, used for heating and AC. The joule is the SI unit of energy, the work done by one newton acting over one meter. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert british thermal units to joules
1 BTU = 1,055.06 J. To convert, multiply the number of british thermal units by 1,055.06. For example, 5 BTU = 5,275.28 J, and 20 BTU = 21,101.1 J. To go the other way, multiply joules by 0.000947817 (since 1 J = 0.000947817 BTU).
British Thermal Units to Joules conversion table
| British Thermal Units (BTU) | Joules (J) |
|---|---|
| 1 | 1,055.06 |
| 10 | 10,550.6 |
| 100 | 105,506 |
| 500 | 527,528 |
| 1,000 | 1,055,060 |
| 2,000 | 2,110,110 |
| 5,000 | 5,275,280 |
FAQ
What is 1 BTU in J?
1 BTU = 1,055.06 J. To convert any amount, multiply the number of british thermal units by 1,055.06.
How do I convert joules back to british thermal units?
Go the other way: 1 J = 0.000947817 BTU, so multiply joules by 0.000947817 to get british thermal units.
Is a british thermal unit bigger than a joule?
Yes — 1 BTU is the larger unit, equal to 1,055.06 J.
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.