Energy Converter
Energy is the capacity to do work. The SI unit is the joule (J). The kilowatt-hour on an electricity bill is exactly 3.6 megajoules. The food "Calorie" on nutrition labels is actually a kilocalorie, about 4.2 kilojoules.
1 Kilojoule = 0.9478171203 BTU
How to convert Kilojoule to BTU
One Kilojoule equals 0.9478171203 BTU, so multiply any value in kJ by 0.9478171203 to get BTU. To convert back, divide by 0.9478171203 — or multiply by 1.055055853.
BTU = kJ × 0.9478171203
Example: 25 kJ × 0.9478171203 = 23.69542801 BTU.
Kilojoule to BTU table
| Kilojoule (kJ) | BTU (BTU) |
|---|---|
| 1 | 0.9478171203 |
| 2 | 1.895634241 |
| 3 | 2.843451361 |
| 4 | 3.791268481 |
| 5 | 4.739085602 |
| 10 | 9.478171203 |
| 15 | 14.2172568 |
| 20 | 18.95634241 |
| 25 | 23.69542801 |
| 50 | 47.39085602 |
| 75 | 71.08628402 |
| 100 | 94.78171203 |
| 250 | 236.9542801 |
| 500 | 473.9085602 |
| 1,000 | 947.8171203 |
BTU to Kilojoule table
| BTU (BTU) | Kilojoule (kJ) |
|---|---|
| 1 | 1.055055853 |
| 2 | 2.110111705 |
| 3 | 3.165167558 |
| 4 | 4.22022341 |
| 5 | 5.275279263 |
| 10 | 10.55055853 |
| 15 | 15.82583779 |
| 20 | 21.10111705 |
| 25 | 26.37639632 |
| 50 | 52.75279263 |
| 75 | 79.12918895 |
| 100 | 105.5055853 |
| 250 | 263.7639632 |
| 500 | 527.5279263 |
| 1,000 | 1,055.055853 |
Energy units at a glance
All 9 units this converter supports, each expressed in Joule (J) and the other way round.
| Unit | Symbol | 1 unit in J | 1 J in unit |
|---|---|---|---|
| Joule | J | 1 | 1 |
| Kilojoule | kJ | 1,000 | 0.001 |
| Calorie | cal | 4.184 | 0.2390057361 |
| Kilocalorie | kcal | 4,184 | 0.0002390057361 |
| Watt-hour | Wh | 3,600 | 0.0002777777778 |
| Kilowatt-hour | kWh | 3,600,000 | 2.777777778e-7 |
| Electronvolt | eV | 1.602176634e-19 | 6.241509074e+18 |
| BTU | BTU | 1,055.055853 | 0.0009478171203 |
| Foot-pound | ft·lbf | 1.355817948 | 0.7375621493 |
Popular conversions
Where energy conversions are used
Electricity billing, nutrition and diet, heating fuels quoted in BTU, physics, and battery capacity.
Frequently asked questions
What is 1 Kilojoule in BTU?
1 Kilojoule (kJ) is 0.9478171203 BTU (BTU).
What is 1 BTU in Kilojoule?
1 BTU (BTU) is 1.055055853 Kilojoule (kJ).
How do I convert Kilojoule to BTU?
Multiply the value in Kilojoule by 0.9478171203. For example, 5 kJ × 0.9478171203 = 4.739085602 BTU. To go the other way, divide by 0.9478171203.
How many units does the energy converter support?
It converts between 9 units: Joule, Kilojoule, Calorie, Kilocalorie, Watt-hour, Kilowatt-hour, Electronvolt, BTU, Foot-pound.
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Figures on this page are calculated with the same conversion factors as the converter above and shown to up to 10 significant figures. See our disclaimer before relying on a result in a professional or safety-critical context.