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Kilocalories to Calories Converter

Convert kilocalories to calories and calories to kilocalories instantly. Bidirectional energy converter with formula and common values.

Kilocalories to Calories: 1 kcal equals 1000 cal. To convert kilocalories to calories, multiply by 1000 (cal = kcal × 1000). For example, 10 kcal = 10000 cal.

2.5 kcal = 2,500 cal

cal = kcal × 1000

How to Convert Kilocalories to Calories

To convert from kilocalories to calories, multiply the value by 1000. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Kilocalories to Calories: cal = kcal × 1000
  • Calories to Kilocalories: kcal = cal ÷ 1000
Kilocalories to Calories conversion scale — a dual ruler showing 1 kcal equals 1,000 cal.
Kilocalories to Calories conversion scale (kcal to cal).

Kilocalories to Calories Conversion Chart

Kilocalories (kcal)Calories (cal)
0.1100
0.25250
0.5500
11000
22000
33000
55000
1010000
2020000
2525000
5050000
100100000
250250000
10001000000

Understanding the Units

What is a Kilocalorie?

A kilocalorie (kcal) equals 1,000 small calories, or 4,184 joules. In nutrition, the food "Calorie" (capital C) refers to the kilocalorie.

Common contexts: nutrition (US), metabolism, food labeling.

What is a Calorie?

The thermochemical calorie equals exactly 4.184 joules; the historical "small" calorie raised one gram of water by one degree Celsius.

Common contexts: chemistry, historical thermodynamics.

Real-World Reference Points

Item Kilocalories (kcal) Calories (cal)
Slice of bread8080000
Banana (medium)105105000
Daily intake (adult)20002000000

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Joules to Kilocalories Converter

Convert joules to kilocalories and kcal to joules.

Kilocalories to Joules Converter

Convert kilocalories to joules — 1 kcal = 4,184 J. Food energy reference, calorie vs kilocalorie guide, and conversion table.

Kilocalories to Kilojoules Converter

Convert kilocalories to kilojoules and kJ to kcal.

FAQ

How many calories are in one kilocalorie?

One kilocalorie equals exactly 1,000 calories. In nutrition, what people commonly call a "calorie" is actually a kilocalorie (kcal).

What is the difference between cal and kcal?

A calorie (cal) is a small unit of energy. A kilocalorie (kcal) equals 1,000 cal. Food labels in the US use "Calories" (capital C) to mean kilocalories.

Why do food labels say Calories instead of kilocalories?

US food labeling convention uses "Calories" (capital C) as shorthand for kilocalories. A food item listed as 250 Calories actually contains 250 kcal or 250,000 small calories.

How do I convert 2.3 kcal to calories?

Multiply 2.3 by 1,000. So 2.3 kcal = 2,300 cal.

How many calories are in 1 kilocalory?

1 kcal equals 1000 cal.

How do you convert kilocalories to calories?

Multiply the kilocalory value by 1000. Formula: cal = kcal × 1000.

How many calories are in 5 kilocalories?

5 kcal = 5000 cal.

How do you convert calories back to kilocalories?

Use the inverse formula: kcal = cal ÷ 1000. For example, 1 cal = 0.001 kcal.

What is the difference between Kilocalory and Calory?

A kilocalorie (kcal) equals 1,000 small calories, or 4,184 joules. In nutrition, the food "Calorie" (capital C) refers to the kilocalorie. The thermochemical calorie equals exactly 4.184 joules; the historical "small" calorie raised one gram of water by one degree Celsius.