Calories per Gram to Megajoules per Kilogram Converter
Enter the fuel efficiency in calories per gram below to convert it to megajoules per kilogram.
Convert Calories per Gram to Megajoules per Kilogram
Enter a value in calories per gram (cal/g) to convert to megajoules per kilogram (MJ/kg).
Calorie per Gram to Megajoule per Kilogram Conversion Table
Table showing various calorie per gram measurements converted to megajoules per kilogram. Click any preset value or arrow to load it into the converter.
| Calories per Gram (cal/g) | Megajoules per Kilogram (MJ/kg) |
|---|---|
| 1 cal/g | 0.0041868 MJ/kg |
| 2 cal/g | 0.0083736 MJ/kg |
| 2.5 cal/g | 0.010467 MJ/kg |
| 5 cal/g | 0.020934 MJ/kg |
| 10 cal/g | 0.041868 MJ/kg |
| 15 cal/g | 0.062802 MJ/kg |
| 20 cal/g | 0.083736 MJ/kg |
| 25 cal/g | 0.10467 MJ/kg |
| 30 cal/g | 0.125604 MJ/kg |
| 50 cal/g | 0.20934 MJ/kg |
How to Convert Calories per Gram to Megajoules per Kilogram
To convert calories per gram to megajoules per kilogram, multiply the fuel efficiency by the following conversion ratio: 0.0041868 megajoules per kilogram/calorie per gram.
Since one calorie per gram is equal to 0.0041868 megajoules per kilogram, you can use this simple formula to convert:
The fuel efficiency in megajoules per kilogram is equal to the fuel efficiency in calories per gram multiplied by 0.0041868.
For example, here's how to convert 5 calories per gram to megajoules per kilogram using the formula above.
How Many Megajoules per Kilogram Are in a Calorie per Gram?
There are 0.0041868 megajoules per kilogram in a calorie per gram, which is why we use this value in the formula above.
Our calorie per gram to megajoule 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 megajoules 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 Megajoule per Kilogram?
A megajoule per kilogram is a unit of fuel efficiency equal to 1,000,000 joules per kilogram (J/kg), the base unit for fuel efficiency. Standard fuel heating value unit (1,000,000 J/kg). [2]
The megajoule per kilogram is classified as a metric and SI-compatible unit of fuel efficiency. Megajoules per Kilogram can be abbreviated as MJ/kg; for example, 1 megajoule per kilogram can be written as 1 MJ/kg.
In the metric system, "mega" is the standard SI prefix for millions, or 10⁶. This makes the megajoule per kilogram (MJ/kg) a convenient decimal multiple of the joule per kilogram (J/kg).
In practice, megajoules per kilogram (MJ/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 megajoules per kilogram (MJ/kg), keep full floating-point precision (1 cal/g = 0.0041868 MJ/kg; 1 MJ/kg = 238.8458966 cal/g) during intermediate calculations and round only the final megajoule per kilogram figure to match your instrument tolerance.
More Calorie per Gram & Megajoule per Kilogram Conversions
Need to calculate in the opposite direction? Use our megajoules per kilogram to calories per gram calculator to switch your starting unit immediately. You can also explore related tools such as converting megajoules per kilogram to calories per gram, converting joules per kilogram to megajoules 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 Megajoules per Kilogram (MJ/kg)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Calorie (IT) per Gram (cal/g) & Megajoule per Kilogram (MJ/kg)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (cal/g to MJ/kg)