Calories per Gram to Kilojoules per Kilogram Converter
Enter the fuel efficiency in calories per gram below to convert it to kilojoules per kilogram.
Convert Calories per Gram to Kilojoules per Kilogram
Enter a value in calories per gram (cal/g) to convert to kilojoules per kilogram (kJ/kg).
Calorie per Gram to Kilojoule per Kilogram Conversion Table
Table showing various calorie per gram measurements converted to kilojoules per kilogram. Click any preset value or arrow to load it into the converter.
| Calories per Gram (cal/g) | Kilojoules per Kilogram (kJ/kg) |
|---|---|
| 1 cal/g | 4.1868 kJ/kg |
| 2 cal/g | 8.3736 kJ/kg |
| 2.5 cal/g | 10.467 kJ/kg |
| 5 cal/g | 20.934 kJ/kg |
| 10 cal/g | 41.868 kJ/kg |
| 15 cal/g | 62.802 kJ/kg |
| 20 cal/g | 83.736 kJ/kg |
| 25 cal/g | 104.67 kJ/kg |
| 30 cal/g | 125.604 kJ/kg |
| 50 cal/g | 209.34 kJ/kg |
How to Convert Calories per Gram to Kilojoules per Kilogram
To convert calories per gram to kilojoules per kilogram, multiply the fuel efficiency by the following conversion ratio: 4.1868 kilojoules per kilogram/calorie per gram.
Since one calorie per gram is equal to 4.1868 kilojoules per kilogram, you can use this simple formula to convert:
The fuel efficiency in kilojoules per kilogram is equal to the fuel efficiency in calories per gram multiplied by 4.1868.
For example, here's how to convert 5 calories per gram to kilojoules per kilogram using the formula above.
How Many Kilojoules per Kilogram Are in a Calorie per Gram?
There are 4.1868 kilojoules per kilogram in a calorie per gram, which is why we use this value in the formula above.
Our calorie per gram to kilojoule per kilogram calculator automatically converts your fuel efficiency measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Calories per Gram and kilojoules per kilogram are both units used to measure fuel efficiency. Keep reading to learn more about each unit.
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). [1]
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.
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. [2]
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.
When converting fuel efficiency between calories per gram (cal/g) and kilojoules per kilogram (kJ/kg), keep full floating-point precision (1 cal/g = 4.1868 kJ/kg; 1 kJ/kg = 0.2388459 cal/g) during intermediate calculations and round only the final kilojoule per kilogram figure to match your instrument tolerance.
More Calorie per Gram & Kilojoule per Kilogram Conversions
Need to calculate in the opposite direction? Use our kilojoules per kilogram to calories per gram calculator to switch your starting unit immediately. You can also explore related tools such as converting kilojoules per kilogram to calories per gram, converting joules per kilogram to kilojoules per kilogram, or converting calories per gram to joules per kilogram.
Convert from Calories per Gram
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Fuel Efficiency - Mass Metrology Standard — Calories per Gram (cal/g) to Kilojoules per Kilogram (kJ/kg)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Calorie (IT) per Gram (cal/g) & Kilojoule per Kilogram (kJ/kg)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (cal/g to kJ/kg)