⚡ Energy
joules to BTU Converter
Convert joules to BTU instantly with a reference conversion table.
Quick answer: To convert joules to BTU, multiply by 0.000947817. For example, 1 joules = 0.000947817 BTU. Use the calculator below for any value.
joules to BTU
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Common conversions
| joules | BTU |
|---|
Formula:
How to convert joules to BTU
1
Enter your value
Type the number of joules you want to convert into the left box. The result in btu appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — BTU to joules. Your current value carries across so you don't have to re-enter anything.
3
About joules and BTU
joules and BTU are common energy measurements.
📊 Common conversions at a glance
| joules | BTU |
|---|---|
| 1 | 0.0009478 |
| 100 | 0.09478 |
| 500 | 0.4739 |
| 1000 | 0.9478 |
| 5000 | 4.739 |
| 10000 | 9.478 |
Reviewed for 2026. joules ↔ BTU conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.
Frequently asked questions
How do I convert joules to BTU?
To convert joules to BTU, multiply by 0.000947817. Or use the calculator above for instant results.
How many BTU are in 1 joules?
1 joules equals 0.000947817 BTU.
Is the joules to BTU converter free?
Yes, the joules to BTU converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.