Kilocalories to Calories Converter
Enter the energy in kilocalories below to convert it to calories.
Convert Kilocalories to Calories
Enter a value in kilocalories (kcal) to convert to calories (cal).
Kilocalorie to Gram Calorie Conversion Table
Table showing various kilocalorie measurements converted to calories. Click any preset value or arrow to load it into the converter.
| Kilocalories (kcal) | Calories (cal) |
|---|---|
| 1 kcal | 1,000 cal |
| 2 kcal | 2,000 cal |
| 2.5 kcal | 2,500 cal |
| 5 kcal | 5,000 cal |
| 10 kcal | 10,000 cal |
| 15 kcal | 15,000 cal |
| 20 kcal | 20,000 cal |
| 25 kcal | 25,000 cal |
| 30 kcal | 30,000 cal |
| 50 kcal | 50,000 cal |
How to Convert Kilocalories to Calories
To convert kilocalories to calories, multiply the energy by the following conversion ratio: 1,000 calories/kilocalorie.
Since one kilocalorie is equal to 1,000 calories, you can use this simple formula to convert:
The energy in calories is equal to the energy in kilocalories multiplied by 1,000.
For example, here's how to convert 5 kilocalories to calories using the formula above.
How Many Calories Are in a Kilocalorie?
There are 1,000 calories in a kilocalorie, which is why we use this value in the formula above.
Our kilocalorie to gram calorie calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Kilocalories and calories are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Kilocalorie?
A kilocalorie is a unit of energy equal to 4,184 joules (J), the base unit for energy. Dietary Calorie equal to 1,000 small calories (4,184 Joules). [1]
The kilocalorie is classified as a standard unit of energy. Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilocalorie (kcal) a convenient decimal multiple of the calorie (cal).
In practice, kilocalories (kcal) are widely used across large-scale industrial, bulk, and macro-level energy specifications within international standard workflows, engineering documentation, and technical data sheets.
What Is a Gram Calorie?
A gram calorie is a unit of energy equal to 4.184 joules (J), the base unit for energy. Thermochemical gram calorie defined as 4.184 Joules. [2]
The gram calorie is classified as a standard unit of energy. Calories can be abbreviated as cal; for example, 1 gram calorie can be written as 1 cal.
When working with calories (cal) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, calories (cal) are widely used across standard energy applications within international standard workflows, engineering documentation, and technical data sheets.
When converting energy between kilocalories (kcal) and calories (cal), keep full floating-point precision (1 kcal = 1,000 cal; 1 cal = 0.001 kcal) during intermediate calculations and round only the final gram calorie figure to match your instrument tolerance.
More Kilocalorie & Gram Calorie Conversions
Need to calculate in the opposite direction? Use our calories to kilocalories converter (cal to kcal) to switch your starting unit immediately. You can also explore related tools such as converting joules to calories, converting kilocalories to kilojoules, or converting calories to joules.
Convert from Kilocalories
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Kilocalories (kcal) to Calories (cal)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Kilocalorie (Food Calorie) (kcal) & Gram Calorie (cal) (cal)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (kcal to cal)