Joules to British thermal units (IT)
Convert joules to british thermal units (it) (J to BTU). 1 J = 0.000947817120313 BTU. Use the calculator, formula and conversion table.
How to convert joules to british thermal units (it)
Multiply the amount in joules by 0.000947817120313 to get british thermal units (it). The displayed factor and results are rounded to 12 significant digits.
BTU = J × 0.000947817120313Worked example
1 J = 0.000947817120313 BTU. Change the amount in the calculator above to use your own value.
Units and assumptions
A watt-hour is 3,600 joules. Calories use the thermochemical definition (4.184 J); BTU uses the International Table definition.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Joules to British thermal units (IT) table
| Joules (J) | British thermal units (IT) (BTU) |
|---|---|
| 0 | 0 |
| 1 | 0.000947817120313 |
| 5 | 0.00473908560157 |
| 10 | 0.00947817120313 |
| 25 | 0.0236954280078 |
| 100 | 0.0947817120313 |
| 1,000 | 0.947817120313 |
About this conversion
What is the formula for joules to british thermal units (it)?
BTU = J × 0.000947817120313. Multiply the amount in joules by 0.000947817120313 to get british thermal units (it). The displayed factor and results are rounded to 12 significant digits.
How do I convert back to joules?
Use the british thermal units (it) to joules calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the energy converter to browse all supported pairs.