BTU to Kilojoule
Convert BTU to Kilojoule instantly. Free online engineering unit converter with exact formula, conversion table and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Use the converter to see the formula.
Results update instantly for BTU to Kilojoule conversions.
Reserved above the conversion cards and below the converter.
Formula
kJ = BTU × 1.05506
BTU = kJ × 0.947817
Conversion table
| 1 BTU | 1.05506 kJ |
| 5 BTU | 5.27528 kJ |
| 10 BTU | 10.5506 kJ |
| 20 BTU | 21.1011 kJ |
| 50 BTU | 52.7528 kJ |
| 100 BTU | 105.506 kJ |
| 500 BTU | 527.528 kJ |
| 1000 BTU | 1055.06 kJ |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
What is the source unit in this conversion?
The source unit is the BTU (BTU). British thermal unit.
What is the destination unit in this conversion?
The destination unit is the Kilojoule (kJ). Kilojoule is 1000 joule units.
How do I convert BTU to Kilojoule?
Multiply the BTU value by 1.05506. For example, 10 BTU × 1.05506 = 10.5506 kJ.
Is the BTU to Kilojoule conversion exact?
Yes. Both units belong to the same engineering measurement family (energy), so the ratio between them is a fixed, defined value rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in BTU needs to be compared with, or reported in, Kilojoule, such as in engineering, scientific, or industrial calculations.
Can I convert Kilojoule back to BTU?
Yes. Multiply the Kilojoule value by 0.947817 to get BTU.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
This page converts BTU (BTU) to Kilojoule (kJ) within the engineering converter.
British thermal unit. Kilojoule is 1000 joule units.
The formula is kJ = BTU × 1.05506, based on each unit's fixed relationship to the energy base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common BTU values already converted to Kilojoule.