kcal to Cal Converter
Type a value in kilocalories to see it in gram calories as you type, with the exact formula and a reference chart.
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How this was calculated
- 1 kilocalorie = 1,000 gram calories
- 100 × 1,000 = 100,000 cal
| kcal | cal |
|---|---|
| 0.1 kcal | 100 cal |
| 0.5 kcal | 500 cal |
| 1 kcal | 1,000 cal |
| 2 kcal | 2,000 cal |
| 5 kcal | 5,000 cal |
| 10 kcal | 10,000 cal |
| 50 kcal | 50,000 cal |
| 100 kcal | 100,000 cal |
| 250 kcal | 250,000 cal |
| 500 kcal | 500,000 cal |
| 1,000 kcal | 1,000,000 cal |
| 2,000 kcal | 2,000,000 cal |
| 2,500 kcal | 2,500,000 cal |
| cal | kcal |
|---|---|
| 100 cal | 0.1 kcal |
| 200 cal | 0.2 kcal |
| 500 cal | 0.5 kcal |
| 1,000 cal | 1 kcal |
| 2,000 cal | 2 kcal |
| 5,000 cal | 5 kcal |
| 10,000 cal | 10 kcal |
| 20,000 cal | 20 kcal |
| 50,000 cal | 50 kcal |
| 100,000 cal | 100 kcal |
| 200,000 cal | 200 kcal |
| 500,000 cal | 500 kcal |
How to convert kilocalories to gram calories
1 kilocalorie = 1,000 gram calories. To convert kilocalories to gram calories, multiply by 1,000. A kilocalorie (the food Calorie) is 1,000 thermochemical calories, exactly 4,184 J. A gram calorie (thermochemical calorie, written with a lowercase c) is exactly 4.184 J; 1,000 of them make one food Calorie (kilocalorie).
Worked examples
- 1 kilocalorie = 1,000 cal (1 × 1,000)
- 100 kilocalories = 100,000 cal (100 × 1,000)
- 2,000 kilocalories = 2,000,000 cal (2,000 × 1,000)
Where this conversion comes up
Kilocalories are used for nutrition labels, diet plans and fitness trackers; gram calories for chemistry, physics and calorimetry. Food labels say "calories" but mean kilocalories (kcal, a capital-C Calorie). Physics and chemistry use the gram calorie (cal), which is 1,000 times smaller, so 1 kcal is 1,000 cal and a 2,000 kcal diet is 2,000,000 cal. This page converts to the small gram calorie (4.184 J); to read a label's Calories in kcal they are already the same number.
Quick estimate
Add three zeros: 5 kcal = 5,000 cal.
Common mistakes
- Dividing instead of multiplying. A gram calorie is smaller than a kilocalorie, so the number of gram calories must come out larger: 1 kilocalorie = 1,000 cal.
Related energy converters: kj to calories, kcal to kj, kj to kcal, kwh to mwh, kj to j, j to kj.
Frequently asked questions
How do you convert kilocalories to gram calories?
Multiply the kilocalories by 1,000. For example, 100 kilocalories is 100,000 gram calories.
How many gram calories are in one kilocalorie?
One kilocalorie is 1,000 gram calories. A kilocalorie (the food Calorie) is 1,000 thermochemical calories, exactly 4,184 J.
What is 2,000 kilocalories in gram calories?
2,000 kilocalories is 2,000,000 gram calories.
Is there a quick way to estimate kilocalories to gram calories?
Add three zeros: 5 kcal = 5,000 cal.