Btu to Kilojoules converter

BTU to kJ — 1 kcal = 4,184 J

Convert Btu to all units

J Joules
kJ Kilojoules
cal Calories
kcal Kilocalories
Wh Watt Hours
kWh Kilowatt Hours
eV Electronvolts
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Conversion Formula

Btu to Kilojoules: 1 kcal = 4,184 J

Example: To convert 500 kcal to joules: 500 × 4,184 = 2,092,000 J

Quick Reference: Btu to Kilojoules

BtuKilojoules
1 BTU1.0551 kJ
5 BTU5.2753 kJ
10 BTU10.5506 kJ
25 BTU26.3765 kJ
50 BTU52.753 kJ
100 BTU105.51 kJ
500 BTU527.53 kJ
1,000 BTU1,055.06 kJ

Frequently Asked Questions

How do I convert Btu to Kilojoules?

Multiply your btu value by the conversion factor. To convert 500 kcal to joules: 500 × 4,184 = 2,092,000 J. You can also use the converter above for instant results.

What is BTU in kJ?

1 BTU equals 1.0551 kJ. This is based on the standard conversion factor: 1 kcal = 4,184 J.

Is this converter accurate?

Yes. ConvertFast uses precise conversion factors computed client-side in your browser. Results are accurate to 6 significant digits, which covers all practical use cases.