British Thermal Unit to Kilojoule
Free instant british thermal unit to kilojoule converter. 1 BTU = 1.05506 kJ.
Common British Thermal Unit to Kilojoule values
| British Thermal Unit (BTU) | Kilojoule (kJ) |
|---|---|
| 1 | 1.05506 |
| 5 | 5.27528 |
| 10 | 10.5506 |
| 25 | 26.3764 |
| 50 | 52.7528 |
| 100 | 105.506 |
| 500 | 527.528 |
| 1000 | 1055.06 |
How does British Thermal Unit to Kilojoule conversion work?
Type a value in the British Thermal Unit (BTU) field and the equivalent in Kilojoule (kJ) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
British Thermal Unit. The energy needed to raise 1 pound of water by 1°F. Common in heating/cooling system ratings.
Kilojoule. 1,000 joules. Common unit on food labels in metric countries.
⚡ Instant results
No submit button — the result updates as you type. Math runs entirely in your browser, so it’s as fast as your device.
📱 Use on any device
Works in any modern browser — Mac, Windows, Linux, iPhone, Android, tablets. No installation, no signup.
🎯 Accurate conversions
Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
🎁 Always free, no signup
Free, every time. No account, no email, no “trial” that becomes paid. Ad-supported so you never have to pay.