Kilocalories to Calories Converter
1 kilocalorie = 1,000 calories
This is the unit written as "Calories" on nutrition labels.
This is the small calorie. The "Calorie" on food labels is a kilocalorie, which is 1,000 of these.
1 kilocalorie equals 1,000 calories
How to convert kilocalories to calories
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
cal = kcal × 1000One kilocalorie is 1000 calories, so a single multiplication converts any value.
10,000 cal = 10 × 1000This is the unit written as "Calories" on nutrition labels.
This is the small calorie. The "Calorie" on food labels is a kilocalorie, which is 1,000 of these.
Kilocalories to calories conversion table
Common values in kilocalories, converted to calories.
| Kilocalories (kcal) | Calories (cal) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1,000 | 1,000,000 |
About these units
kilocaloriekcal
One thousand thermochemical calories: exactly 4,184 joules.
caloriecal
The thermochemical calorie: exactly 4.184 joules.
Reference: NIST Special Publication 811.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.