btu to joules | Exact Decimal + Formula
1 BTU = 1055.055853 Joule
One btu equals about 1.1 thousand joules (exactly 1055.055853 J). Real-world use: HVAC heating and cooling ratings, gas appliances, and barbecue grills. This page expresses those values in joules, which is used for physics and engineering energy calculations. Type a value above for an instant answer; the exact formula and the reference table are below.
About BTU and Joule
BTU (BTU)
A British thermal unit (BTU) is the heat needed to raise one pound of water by one degree Fahrenheit, about 1,055 joules.
Where it's used: HVAC heating and cooling ratings, gas appliances, and barbecue grills.
Joule (J)
The joule is the SI unit of energy — the work done by one newton over one meter.
Where it's used: Physics and engineering energy calculations.
Advertisement
Energy Converter
Tab Switch fieldsS SwapC Copy
Formula
J = BTU × 1055.05585262
To convert BTU to Joule, use the formula displayed above.
Pinned Favorites
No pinned converters yet. Click the star button to pin common pairs.
Recent History
Conversions you copy will be recorded here.
Advertisement
BTU to Joule: Quick Reference Table
| BTU | Joule (Decimal) | Fraction |
|---|---|---|
| 0.001 BTU | 1.055056 J | - |
| 0.01 BTU | 10.550559 J | - |
| 0.1 BTU | 105.505585 J | - |
| 0.5 BTU | 527.527926 J | - |
| 1 BTU | 1055.055853 J | - |
| 2 BTU | 2110.111705 J | - |
| 5 BTU | 5275.279263 J | - |
| 10 BTU | 10550.558526 J | - |
| 25 BTU | 26376.396315 J | - |
| 50 BTU | 52752.792631 J | - |
| 100 BTU | 105505.585262 J | - |
| 250 BTU | 263763.963155 J | - |
| 500 BTU | 527527.92631 J | - |
| 1000 BTU | 1055055.85262 J | - |
BTU to J Formula and Examples
Direct Formula
J = BTU × 1055.05585262 Inverse Formula
BTU = J × 0.000948 Mental Math Shortcut
Multiply the value by roughly 1055.1 to calculate the equivalent amount in your head.
Common BTU to Joule Calculations
- 5 BTU = 5275.279263 J
- 10 BTU = 10550.558526 J
- 50 BTU = 52752.792631 J
- 100 BTU = 105505.585262 J
- 500 BTU = 527527.92631 J
Precision & Practical Use
For example, 10 BTU = 10550.558526 J — roughly multiple unit increments.
Utility bills and appliance ratings are given in whole kWh or BTU. Round converted figures to match the source document you're comparing against.
Advertisement
How to Convert BTU to Joule
How many joules are in one btu?
One BTU (BTU) equals 1055.055853 Joule (J). To convert btus to joules, multiply the btu value by 1055.055853.
How do I convert BTU to Joule?
Multiply your btu value by 1055.055853 to get the result in Joule: J = BTU × 1055.055853. For example, 5 BTU = 5275.279263 J.
What is the formula for converting BTU to J?
The conversion formula is J = BTU × 1055.055853. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for BTU to J?
Multiply the value by roughly 1055.1 to calculate the equivalent amount in your head.
Advertisement