Kilojoules per Kilogram to Calories per Gram Converter
Enter the fuel efficiency in kilojoules per kilogram below to convert it to calories per gram.
Convert Kilojoules per Kilogram to Calories per Gram
Enter a value in kilojoules per kilogram (kJ/kg) to convert to calories per gram (cal/g).
Kilojoule per Kilogram to Calorie per Gram Conversion Table
Table showing various kilojoule per kilogram measurements converted to calories per gram. Click any preset value or arrow to load it into the converter.
| Kilojoules per Kilogram (kJ/kg) | Calories per Gram (cal/g) |
|---|---|
| 1 kJ/kg | 0.2388459 cal/g |
| 2 kJ/kg | 0.4776918 cal/g |
| 2.5 kJ/kg | 0.5971147 cal/g |
| 5 kJ/kg | 1.1942295 cal/g |
| 10 kJ/kg | 2.388459 cal/g |
| 15 kJ/kg | 3.5826884 cal/g |
| 20 kJ/kg | 4.7769179 cal/g |
| 25 kJ/kg | 5.9711474 cal/g |
| 30 kJ/kg | 7.1653769 cal/g |
| 50 kJ/kg | 11.9422948 cal/g |
How to Convert Kilojoules per Kilogram to Calories per Gram
To convert kilojoules per kilogram to calories per gram, multiply the fuel efficiency by the following conversion ratio: 0.2388459 calories per gram/kilojoule per kilogram.
Since one kilojoule per kilogram is equal to 0.2388459 calories per gram, you can use this simple formula to convert:
The fuel efficiency in calories per gram is equal to the fuel efficiency in kilojoules per kilogram multiplied by 0.2388459.
For example, here's how to convert 5 kilojoules per kilogram to calories per gram using the formula above.
How Many Calories per Gram Are in a Kilojoule per Kilogram?
There are 0.2388459 calories per gram in a kilojoule per kilogram, which is why we use this value in the formula above.
Our kilojoule per kilogram to calorie per gram calculator automatically converts your fuel efficiency measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Kilojoules per Kilogram and calories per gram are both units used to measure fuel efficiency. Keep reading to learn more about each unit.
What Is a Kilojoule per Kilogram?
A kilojoule per kilogram is a unit of fuel efficiency equal to 1,000 joules per kilogram (J/kg), the base unit for fuel efficiency. Equal to 1,000 J/kg. [1]
The kilojoule per kilogram is classified as a metric and SI-compatible unit of fuel efficiency. Kilojoules per Kilogram can be abbreviated as kJ/kg; for example, 1 kilojoule per kilogram can be written as 1 kJ/kg.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilojoule per kilogram (kJ/kg) a convenient decimal multiple of the joule per kilogram (J/kg).
In practice, kilojoules per kilogram (kJ/kg) are widely used across large-scale industrial, bulk, and macro-level fuel efficiency specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Calorie per Gram?
A calorie per gram is a unit of fuel efficiency equal to 4,186.8 joules per kilogram (J/kg), the base unit for fuel efficiency. Equal to 4,186.8 J/kg (1 kcal/kg). [2]
The calorie per gram is classified as a metric and SI-compatible unit of fuel efficiency. Calories per Gram can be abbreviated as cal/g; for example, 1 calorie per gram can be written as 1 cal/g.
When working with calories per gram (cal/g) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, calories per gram (cal/g) are widely used across large-scale industrial, bulk, and macro-level fuel efficiency specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting fuel efficiency between kilojoules per kilogram (kJ/kg) and calories per gram (cal/g), keep full floating-point precision (1 kJ/kg = 0.2388459 cal/g; 1 cal/g = 4.1868 kJ/kg) during intermediate calculations and round only the final calorie per gram figure to match your instrument tolerance.
More Kilojoule per Kilogram & Calorie per Gram Conversions
Need to calculate in the opposite direction? Use our calories per gram to kilojoules per kilogram calculator to switch your starting unit immediately. You can also explore related tools such as converting calories per gram to kilojoules per kilogram, converting joules per kilogram to calories per gram, or converting kilojoules per kilogram to joules per kilogram.
Convert from Kilojoules per Kilogram
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Fuel Efficiency - Mass Metrology Standard — Kilojoules per Kilogram (kJ/kg) to Calories per Gram (cal/g)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Kilojoule per Kilogram (kJ/kg) & Calorie (IT) per Gram (cal/g)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (kJ/kg to cal/g)