Joules to Btus Converter
Convert joule to British thermal unit instantly. Type a value below — the result updates as you type.
When you need to convert joule to British thermal unit
Energy conversions appear on nutrition labels, utility bills and appliance specs, letting you compare food energy, electricity use and heating output on a common scale.
Typical values: 0.5 J is about 0.000473909 BTU, and 100 J works out to roughly 0.0948 BTU. Because the ratio is fixed at 0.000947817, you can scale any amount linearly — doubling the joules doubles the BTUs.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert joule to British thermal unit
One joule equals 0.000947817 BTUs. To convert, multiply the number of joules by 0.000947817:
BTUs = joules × 0.000947817
For example, 10 joules × 0.000947817 = 0.0095 BTUs.
Joules to BTUs conversion table
| Energy (J) | Btus (BTU) |
|---|---|
| 1 J | 0.000947817 BTU |
| 2 J | 0.0019 BTU |
| 3 J | 0.0028 BTU |
| 5 J | 0.0047 BTU |
| 10 J | 0.0095 BTU |
| 20 J | 0.019 BTU |
| 50 J | 0.0474 BTU |
| 100 J | 0.0948 BTU |
FAQ
How many BTUs are in a joule?
One joule = 0.000947817 BTUs.
How do I convert BTUs back to joules?
Divide by 0.000947817, or use the BTUs to joules converter.