Convert Calories per Gram to Kilojoules per Kilogram
Instantly convert Calories per Gram (cal/g) to Kilojoules per Kilogram (kJ/kg) with our free online calculator.
Formula: cal/g to kJ/kg — multiply by 4.184
Reference Table
| Calories per Gram (cal/g) | Kilojoules per Kilogram (kJ/kg) |
|---|---|
| 1 | 4.184 |
| 5 | 20.92 |
| 10 | 41.84 |
| 25 | 104.6 |
| 50 | 209.2 |
| 100 | 418.4 |
How to Convert Calories per Gram to Kilojoules per Kilogram
Formula
To convert Calories per Gram (cal/g) to Kilojoules per Kilogram (kJ/kg): multiply by 4.184
Step-by-Step
- Start with your value in Calories per Gram (cal/g).
- Multiply by 4.184 to perform the conversion.
- The result is your value expressed in Kilojoules per Kilogram (kJ/kg).
Conversion Factor
1 cal/g = 4.184 kJ/kg
Reverse Factor
1 kJ/kg = 0.239006 cal/g
Worked Example
Convert 25 Calories per Gram to Kilojoules per Kilogram: 25 cal/g = 104.6 kJ/kg
About Calorie per Gram (cal/g)
A CGS specific-energy unit numerically identical to kcal/kg (= 4.184 kJ/kg). Used in chemistry for reaction enthalpies per unit mass, food science for nutritional energy, and legacy thermochemistry literature. Food labels outside the US that show kcal/100g are effectively displaying this unit scaled down.
About Kilojoule per Kilogram (kJ/kg)
A metric specific-energy unit equal to 1,000 J/kg. kJ/kg is the dominant unit in thermodynamics — specific enthalpy and specific internal energy values in steam tables and refrigerant tables are quoted in kJ/kg. Saturated water enthalpy at 100°C: ~419 kJ/kg; saturated steam at 100°C: ~2,676 kJ/kg. Food energy content outside the US is also reported in kJ/kg.
Quick Facts
- 1 Calorie per Gram equals 4.184 Kilojoules per Kilogram
- 1 Kilojoule per Kilogram equals 0.239006 Calories per Gram
- Calorie per Gram is a unit of specific energy
- Kilojoule per Kilogram is a unit of specific energy
- This conversion is commonly used in fuel comparison, battery technology, and rocket propulsion
- The Calorie per Gram belongs to the metric system
Common Calorie per Gram to Kilojoule per Kilogram Conversions
| Calories per Gram (cal/g) | Kilojoules per Kilogram (kJ/kg) |
|---|---|
| 0.01 | 0.04184 |
| 0.1 | 0.4184 |
| 0.25 | 1.046 |
| 0.5 | 2.092 |
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 5 | 20.92 |
| 10 | 41.84 |
| 15 | 62.76 |
| 20 | 83.68 |
| 25 | 104.6 |
| 50 | 209.2 |
| 75 | 313.8 |
| 100 | 418.4 |
| 250 | 1046 |
| 500 | 2092 |
| 1000 | 4184 |
| 5000 | 20920 |
| 10000 | 41840 |
Understanding Calories per Gram
The Calorie per Gram (symbol: cal/g) is a unit of specific energy. A CGS specific-energy unit numerically identical to kcal/kg (= 4.184 kJ/kg). Used in chemistry for reaction enthalpies per unit mass, food science for nutritional energy, and legacy thermochemistry literature. Food labels outside the US that show kcal/100g are effectively displaying this unit scaled down.
It belongs to the metric measurement system.
Calories per Gram are commonly used in fuel comparison, battery technology, and rocket propulsion.
Understanding Kilojoules per Kilogram
The Kilojoule per Kilogram (symbol: kJ/kg) is a unit of specific energy. A metric specific-energy unit equal to 1,000 J/kg. kJ/kg is the dominant unit in thermodynamics — specific enthalpy and specific internal energy values in steam tables and refrigerant tables are quoted in kJ/kg. Saturated water enthalpy at 100°C: ~419 kJ/kg; saturated steam at 100°C: ~2,676 kJ/kg. Food energy content outside the US is also reported in kJ/kg.
It belongs to the metric measurement system.
Kilojoules per Kilogram are commonly used in fuel comparison, battery technology, and rocket propulsion.
Why Convert Calories per Gram to Kilojoules per Kilogram?
Converting between Calories per Gram and Kilojoules per Kilogram is a frequent requirement for engineers, scientists, and students working with specific energy values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate specific energy conversion is essential.
Frequently Asked Questions
How do I convert Calories per Gram to Kilojoules per Kilogram?
A CGS specific-energy unit numerically identical to kcal/kg (= 4. To convert Calories per Gram to Kilojoules per Kilogram, multiply by 4.184. For example, 25 cal/g equals 104.6 kJ/kg.
How many Kilojoules per Kilogram are in 1 Calorie per Gram?
There are 4.184 Kilojoules per Kilogram in 1 Calorie per Gram.
How many Calories per Gram are in 1 Kilojoule per Kilogram?
There are 0.239006 Calories per Gram in 1 Kilojoule per Kilogram.
What is the formula for Calorie per Gram to Kilojoule per Kilogram conversion?
The formula is: multiply by 4.184. This means 1 cal/g = 4.184 kJ/kg.
Is a Calorie per Gram bigger than a Kilojoule per Kilogram?
No. One Calorie per Gram is smaller than one Kilojoule per Kilogram because 1 cal/g equals 4.184 kJ/kg, which is greater than 1.
When do you need to convert between Calories per Gram and Kilojoules per Kilogram?
A metric specific-energy unit equal to 1,000 J/kg. Calorie per Gram and Kilojoule per Kilogram are both specific energy units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.