45 kcal is equal to 45,000 cal.
This conversion is based on the definition that 1 kilocalorie (kcal) equals 1,000 calories (cal). So, to convert 45 kcal to cal, multiply 45 by 1,000 to get the equivalent amount in calories.
Conversion Tool
Result in cal:
Conversion Formula
The formula to convert kilocalories (kcal) to calories (cal) is simple: multiply the number of kilocalories by 1,000.
This works because the calorie (cal) is a smaller unit of energy than the kilocalorie (kcal). One kilocalorie represents one thousand calories, so the factor of 1,000 comes from the metric prefix “kilo-” meaning one thousand.
Example calculation:
- Given: 45 kcal
- Formula: cal = kcal × 1,000
- Calculation: 45 × 1,000 = 45,000 cal
Conversion Example
- Convert 12 kcal to cal:
- Multiply 12 by 1,000.
- 12 × 1,000 = 12,000 cal.
- Convert 30.5 kcal to cal:
- Multiply 30.5 by 1,000.
- 30.5 × 1,000 = 30,500 cal.
- Convert 67 kcal to cal:
- Multiply 67 by 1,000.
- 67 × 1,000 = 67,000 cal.
- Convert 5 kcal to cal:
- Multiply 5 by 1,000.
- 5 × 1,000 = 5,000 cal.
- Convert 22.75 kcal to cal:
- Multiply 22.75 by 1,000.
- 22.75 × 1,000 = 22,750 cal.
Conversion Chart
| kcal | cal |
|---|---|
| 20.0 | 20,000 |
| 25.0 | 25,000 |
| 30.0 | 30,000 |
| 35.0 | 35,000 |
| 40.0 | 40,000 |
| 45.0 | 45,000 |
| 50.0 | 50,000 |
| 55.0 | 55,000 |
| 60.0 | 60,000 |
| 65.0 | 65,000 |
| 70.0 | 70,000 |
The chart shows how many calories correspond to each kilocalorie value between 20.0 and 70.0. To find the calories for any kcal value in this range, just locate the kcal in the left column and read the equivalent calories from the right column. This helps quick reference without calculation.
Related Conversion Questions
- How many calories equal 45 kilocalories?
- What is 45 kcal converted to calories?
- Is 45 kcal more or less than 45,000 cal?
- How do I convert 45 kcal into cal units?
- Why does 45 kcal equal thousands of calories?
- Does 45 kcal correspond exactly to 45,000 cal?
- Can I use 45 kcal as 45,000 cal in nutrition labels?
Conversion Definitions
kcal: Kilocalorie, often called “Calorie” in food contexts, is a unit of energy equal to 1,000 calories. It measures heat or energy content in foods and fuels. One kcal is the amount of energy needed to raise the temperature of one kilogram of water by one degree Celsius.
cal: The calorie is a smaller energy unit, used in physics and chemistry, defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius. It is one-thousandth of a kilocalorie, so 1 kcal equals 1,000 cal.
Conversion FAQs
Can I convert kcal to cal by dividing instead of multiplying?
No, when converting kilocalories to calories you multiply by 1,000 because one kilocalorie contains one thousand calories, not the other way. Dividing would give an incorrect smaller value.
Is kcal always 1,000 times cal in every context?
In scientific and nutritional contexts, yes, 1 kcal equals 1,000 cal. However, some fields or older literature might define calories differently, so always check the definition used.
Why do nutrition labels use kcal and sometimes just Calories?
Nutrition labels often use “Calories” with a capital C to mean kilocalories (kcal) for simplicity. So when you see 45 Calories on a label, it means 45 kcal or 45,000 cal in total.
Is there any difference between small calorie and large Calorie?
Yes, the small calorie (cal) is a unit of energy smaller than the large Calorie (kcal). The large Calorie, or kilocalorie, is 1,000 times larger and what is used to measure food energy.
Can I convert calories back to kilocalories easily?
Yes, to convert from calories to kilocalories, divide the calorie value by 1,000. For example, 45,000 cal divided by 1,000 equals 45 kcal.