How many kilocalories are in 1 calorie?

1 cal equals 0.001 kcal. This is an exact conversion factor defined by NIST.

How do I convert calories to kilocalories?

Multiply the value in cal by the conversion factor. For example, 10 cal = 0.01 kcal. Use our calculator above for instant results.

Is the calories to kilocalories conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert calories to kilocalories offline?

Yes! Metric Converter runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between calories and kilocalories?

Calories (cal) and Kilocalories (kcal) are both units of energy but belong to different measurement systems. 1 cal = 0.001 kcal. Use the converter above to switch between them instantly.

Calories to Kilocalories (cal → kcal) — Free Online Converter

Формула преобразования Калории в Килокалории

Чтобы преобразовать Калории в Килокалории, вы можете использовать следующую формулу:

Килокалории = Калории × 1000

Это означает, что вам нужно умножить значение Калории на 1000, чтобы получить эквивалентное значение в Килокалории.

cal → kcal Справочная таблица

cal	kcal
0.01 cal	0.00001 kcal
0.1 cal	0.0001 kcal
0.5 cal	0.0005 kcal
1 cal	0.001 kcal
5 cal	0.005 kcal
10 cal	0.01 kcal
50 cal	0.05 kcal
100 cal	0.1 kcal
500 cal	0.5 kcal
1000 cal	1 kcal

Значения основаны на коэффициентах конвертации NIST SP 811

Why Convert Calories to Kilocalories?

Converting between calories (cal) and kilocalories (kcal) is one of the most common energy conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert cal to kcal saves time and prevents errors.

Energy conversions from cal to kcal are crucial for dietitians, physicists, and engineers. In nutrition, understanding the link between calories and joules helps individuals manage their diet and energy intake effectively. In the power sector, converting between kilowatt-hours and British Thermal Units (BTU) is necessary for sizing heating and cooling systems for homes and offices. Physicists rely on precise energy unit conversions to calculate work, heat, and thermodynamic processes. Whether tracking fitness goals or analyzing home energy bills, accurate conversion empowers users to make better health and financial decisions.

How to Convert Calories to Kilocalories

To convert calories to kilocalories, use the following formula:

kcal = cal × 0.001

Example: 1 cal = 0.001 kcal

For example, 5 cal = 0.005 kcal, 10 cal = 0.01 kcal, and 100 cal = 0.1 kcal. For larger values, 1000 cal = 1 kcal. Conversely, 1 kcal = 1000 cal. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

Calorie confusion: Food 'Calories' are actually kilocalories (kcal).
Joule scale: 1 kWh is 3.6 million Joules (orders of magnitude difference).
Power vs Energy: mixing up Watts (power) and Watt-hours (energy).

Pro Tips

Food labels: Learn to read kcal; average adult needs ~2000 kcal/day.
Battery capacity: Wh = V * Ah. Useful for comparing different voltage batteries.
Efficiency: Energy cannot be created/destroyed, only converted (with some loss as heat).

What is a Calorie?

The calorie (cal) is a pre-SI unit of energy. Historically defined as the heat needed to raise 1 gram of water by 1°C. Food calories are actually kilocalories (kcal).

Calories (specifically kilocalories) are universally used in nutrition to measure the energy content of food and the energy expenditure of physical activity.

What is a Kilocalorie?

A unit of energy equal to 1,000 calories ("Calorie").

Widely used for measuring food energy content.

Калории → Килокалории