Hectojoule is 100 joule units.
Hectojoules to Kilocalories Converter — hJ to kcal
Convert Hectojoule (hJ) to Kilocalorie (kcal) using the exact conversion factor (1 hectojoule = 0.0239005736 kilocalorie). See the formula, worked examples, and conversion table.
Hectojoules to Kilocalories converter
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.
A kilocalorie is 1,000 calories.
Result = input x 100 / 4184.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Hectojoules to Kilocalories
Hectojoule and Kilocalorie both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Hectojoule is 100 joule units, and a kilocalorie is 1,000 calories.
Formula
kilocalories = hectojoules × 0.0239005736138
This factor comes from each unit's defined relationship to the category's base unit: 1 hectojoule equals 100 base units, and 1 kilocalorie equals 4184 base units, so dividing one by the other gives the direct hectojoule-to-kilocalorie factor of 0.0239005736138.
Simple example
1 hJ × 0.02390057361 = 0.0239005736 kcal
1 hectojoule = 0.0239005736 kilocalories.
Real-world example
100 hJ × 0.02390057361 = 2.390057361 kcal
100 hectojoules = 2.390057361 kilocalories.
Conversion table
| Hectojoule (hJ) | Kilocalorie (kcal) |
|---|---|
| 1 hJ | 0.0239005736 kcal |
| 10 hJ | 0.2390057361 kcal |
| 50 hJ | 1.195028681 kcal |
| 100 hJ | 2.390057361 kcal |
| 500 hJ | 11.95028681 kcal |
| 1,000 hJ | 23.90057361 kcal |
Reverse conversion: Kilocalorie to Hectojoule
0.0239005736 kcal × 41.84 = 0.9999999994 hJ
0.0239005736 kilocalories = 0.9999999994 hectojoules.
hectojoules = kilocalories × 41.84
For a page dedicated to this direction, see Kilocalorie to Hectojoule.
Understanding the Hectojoule (hJ)
Hectojoule is 100 joule units.
Understanding the Kilocalorie (kcal)
A kilocalorie is 1,000 calories.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilocalories are in 1 hectojoule?
1 hectojoule equals 0.0239005736 kilocalories, using the exact defined conversion factor rather than an estimate.
How do I convert hectojoule to kilocalorie?
Multiply the hectojoule value by 0.02390057361. The converter above does this instantly to whatever precision you set.
How do I convert kilocalorie back to hectojoule?
Use the reverse factor: 1 kilocalorie equals 41.84 hectojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectojoule?
Hectojoule (hJ) is a unit of engineering.
What is a kilocalorie?
Kilocalorie (kcal) is a unit of engineering.
Is the hectojoule to kilocalorie conversion exact?
Yes. Both hectojoule and kilocalorie are defined by fixed standards rather than physical artifacts, so the factor of 0.02390057361 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.