Calories per Gram to Joules per Kilogram Converter
Enter the fuel efficiency in calories per gram below to convert it to joules per kilogram.
Convert Calories per Gram to Joules per Kilogram
Enter a value in calories per gram (cal/g) to convert to joules per kilogram (J/kg).
Calorie per Gram to Joule per Kilogram Conversion Table
Table showing various calorie per gram measurements converted to joules per kilogram. Click any preset value or arrow to load it into the converter.
| Calories per Gram (cal/g) | Joules per Kilogram (J/kg) |
|---|---|
| 1 cal/g | 4,186.8 J/kg |
| 2 cal/g | 8,373.6 J/kg |
| 5 cal/g | 20,934 J/kg |
| 10 cal/g | 41,868 J/kg |
| 15 cal/g | 62,802 J/kg |
| 20 cal/g | 83,736 J/kg |
| 25 cal/g | 104,670 J/kg |
| 30 cal/g | 125,604 J/kg |
| 50 cal/g | 209,340 J/kg |
| 75 cal/g | 314,010 J/kg |
How to Convert Calories per Gram to Joules per Kilogram
To convert calories per gram to joules per kilogram, multiply the fuel efficiency by the following conversion ratio: 4,186.8 joules per kilogram/calorie per gram.
Since one calorie per gram is equal to 4,186.8 joules per kilogram, you can use this simple formula to convert:
The fuel efficiency in joules per kilogram is equal to the fuel efficiency in calories per gram multiplied by 4,186.8.
For example, here's how to convert 10 calories per gram to joules per kilogram using the formula above.
How Many Joules per Kilogram Are in a Calorie per Gram?
There are 4,186.8 joules per kilogram in a calorie per gram, which is why we use this value in the formula above.
Our calorie per gram to joule 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 joules 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 Joule per Kilogram?
SI unit of specific energy. It serves as a primary reference unit for measuring fuel efficiency across scientific and practical applications. [2]
The joule per kilogram is classified as an International System of Units (SI) unit of fuel efficiency. Joules per Kilogram can be abbreviated as J/kg; for example, 1 joule per kilogram can be written as 1 J/kg.
As the primary coherent reference unit for fuel efficiency in this category, all other fuel efficiency units are mathematically anchored to the joule per kilogram (J/kg).
In practice, joules per kilogram (J/kg) are widely used across standard fuel efficiency applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting fuel efficiency between calories per gram (cal/g) and joules per kilogram (J/kg), keep full floating-point precision (1 cal/g = 4,186.8 J/kg; 1 J/kg = 0.000238846 cal/g) during intermediate calculations and round only the final joule per kilogram figure to match your instrument tolerance.
More Calorie per Gram & Joule per Kilogram Conversions
Need to calculate in the opposite direction? Use our joules per kilogram to calories per gram converter (J/kg to cal/g) to switch your starting unit immediately. You can also explore related tools such as converting kilojoules per kilogram to joules per kilogram, converting megajoules per kilogram to joules per kilogram, or converting joules per kilogram to kilojoules 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 Joules per Kilogram (J/kg)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Calorie (IT) per Gram (cal/g) & Joule per Kilogram (J/kg)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (cal/g to J/kg)