Joule to BTU Converter
Convert joule to BTU instantly.
Standard energy units
kilojoule 0.1
calorie 23.901
kilocalorie 0.0239
watt-hour 0.0278
kilowatt-hour 0
BTU 0.0948
Fun comparisons
apples eaten 🍎~ Less than 0.01
hours of 100W bulb 💡~ Less than 0.01
marathons run 🏃~ Less than 0.01
full car tanks of fuel ⛽~ Less than 0.01
How to convert joule to btu
Enter your energy value in joule and see the result in btu instantly. Key reference points: 1 food Calorie equals 1 kcal (4.184 kJ), and 1 kilowatt-hour equals 3600 kJ (860 kcal).
Joule is the metric SI unit of energy; BTU (British Thermal Unit) is used in the US for heating and cooling systems. One BTU equals approximately 1055 joules.
Need the opposite direction? Convert btu to joule just as easily, or explore all our energy conversions.
Common joule to BTU conversions
| Joule (J) | BTU (BTU) |
|---|---|
| 1 | 0.000947813 |
| 5 | 0.00473907 |
| 10 | 0.00947813 |
| 25 | 0.0236953 |
| 50 | 0.0473907 |
| 100 | 0.0947813 |
| 500 | 0.473907 |
| 1000 | 0.947813 |
Frequently asked questions
1 joule equals 0.000947813 BTU.
Multiply by 0.000947813. For example, 5 J = 0.00473907 BTU.
10,550 joules equals approximately 10 BTU.
1 BTU equals 1055.06 joule.
100 joule equals 0.0947813 BTU.