A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
Hectojoules to Btu
Convert Hectojoule (hJ) to British thermal unit (BTU) instantly with an 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
Energy calculator
Energy Converter
Convert hectojoules (hJ) to btu (BTU) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
BTU = hJ × 0.09478171203
Results update instantly for Hectojoules to Btu conversions.
Reserved above the conversion cards and below the converter.
Formula
BTU = hJ × 0.09478171203
hJ = BTU × 10.55055853
Conversion table
| 1 hJ | 0.094782 BTU |
| 5 hJ | 0.473909 BTU |
| 10 hJ | 0.947817 BTU |
| 20 hJ | 1.895634 BTU |
| 50 hJ | 4.739086 BTU |
| 100 hJ | 9.478171 BTU |
| 500 hJ | 47.390856 BTU |
| 1000 hJ | 94.781712 BTU |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both hectojoule and british thermal unit measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in hectojoules by 0.09478171203 to get btu. To reverse the conversion, multiply a british thermal unit value by 10.55055853 to get back to hectojoules.
Frequently asked questions
What is Hectojoule (hJ)?
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix.
What is British thermal unit (BTU)?
The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
How do I convert hectojoules to btu?
Multiply the hectojoule value by 0.09478171203 to get the equivalent in btu. For example, 5 hJ × 0.09478171203 = 0.473909 BTU.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.09478171203 is an exact, non-rounded value.
Can I convert btu back to hectojoules?
Yes. Divide the british thermal unit value by 0.09478171203, or multiply it by 10.55055853, to get hectojoules.
Reserved between the FAQ and the article so the page stays balanced.
About converting hectojoules to btu
A hectojoule (hJ) is a metric-prefixed unit of energy equal to 102 joules, using the SI hecto prefix. The British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit, widely used for heating and air-conditioning ratings.
Use this calculator to move between hectojoules and btu accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.