BTU to Joules converter (BTU to J)
Convert BTU (BTU) to Joules (J) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert BTU to Joules
1 BTU (British Thermal Unit) is equal to 1055.06 joules (J).
E(J) = E(BTU) × 1055.06
Multiply BTU by 1055.06:
Example: Convert 10 BTU to joules:
E(J) = 10 × 1055.06 = 10550.6 J
What is a BTU?
The BTU (BTU) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Joules?
The Joules (J) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts energy from BTU into Joules. One BTU equals 1055.05585 J.
BTU to Joules conversion table
Common BTU values and the matching J result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| BTU (BTU) | Joules (J) |
|---|---|
| 0 BTU | 0 J |
| 1 BTU | 1055.05585 J |
| 5 BTU | 5275.27925 J |
| 10 BTU | 10550.5585 J |
| 100 BTU | 105505.585 J |
| 500 BTU | 527527.925 J |
| 1000 BTU | 1055055.85 J |
How this calculator works
The form on this page is a BTU-to-Joules converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the J result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many J are in 1 BTU?
1 BTU = 1055.05585 J.
How do I convert BTU to Joules?
Multiply BTU by 1055.06:
Is this BTU to J converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.