Calories to Grams Conversion (kcal to g)

Calories to Grams Converter

Enter the weight in calories below to convert it to grams.

Result in Grams:

1 kcal = 0.129598 g

How to Convert Calories to Grams

To convert a measurement in calories to a measurement in grams, multiply the weight by the following conversion ratio: 0.129598 grams/calorie.

Since one calorie is equal to 0.129598 grams, you can use this simple formula to convert:

grams = calories × 0.129598

The weight in grams is equal to the weight in calories multiplied by 0.129598.

For example, here's how to convert 5 calories to grams using the formula above.

grams = (5 kcal × 0.129598) = 0.647989 g

How Many Grams Are in a Calorie?

There are 0.129598 grams in a calorie, which is why we use this value in the formula above.

1 kcal = 0.129598 g

Calories are a unit of energy, and grams are a unit of weight. Keep reading to learn more about each unit of measure.

What Is a Calorie?

Converting calories is actually a conversion of energy burned by the body performing work rather than actual weight. When measuring the energy content in foods, the large calorie, or kilocalorie, is used, but it's often still just called a "calorie."

One calorie (large calorie) is equal to the heat needed to raise the temperature of one kilogram of water by 1 degree Celsius.^[1] You'll need to burn 3,500 calories more than you eat to lose one pound of weight.^[2]

Calories can be abbreviated as kcal; for example, 1 calorie can be written as 1 kcal.

Learn more about calories.

What Is a Gram?

A gram is a unit of mass equal to 1/1,000 of a kilogram or 0.035274 ounces, and is equivalent to the mass of one cubic centimeter, or one milliliter, of water.

The gram, or gramme, is an SI unit of weight in the metric system. Grams can be abbreviated as g; for example, 1 gram can be written as 1 g.

Learn more about grams.

Calorie to Gram Conversion Table

Table showing various calorie measurements converted to grams.
Calories	Grams
1 kcal	0.129598 g
2 kcal	0.259196 g
3 kcal	0.388793 g
4 kcal	0.518391 g
5 kcal	0.647989 g
6 kcal	0.777587 g
7 kcal	0.907185 g
8 kcal	1.0368 g
9 kcal	1.1664 g
10 kcal	1.296 g
11 kcal	1.4256 g
12 kcal	1.5552 g
13 kcal	1.6848 g
14 kcal	1.8144 g
15 kcal	1.944 g
16 kcal	2.0736 g
17 kcal	2.2032 g
18 kcal	2.3328 g
19 kcal	2.4624 g
20 kcal	2.592 g
21 kcal	2.7216 g
22 kcal	2.8512 g
23 kcal	2.9808 g
24 kcal	3.1103 g
25 kcal	3.2399 g
26 kcal	3.3695 g
27 kcal	3.4991 g
28 kcal	3.6287 g
29 kcal	3.7583 g
30 kcal	3.8879 g
31 kcal	4.0175 g
32 kcal	4.1471 g
33 kcal	4.2767 g
34 kcal	4.4063 g
35 kcal	4.5359 g
36 kcal	4.6655 g
37 kcal	4.7951 g
38 kcal	4.9247 g
39 kcal	5.0543 g
40 kcal	5.1839 g

Table showing various calorie measurements converted to grams.

Calories

Grams

1 kcal

0.129598 g

2 kcal

0.259196 g

3 kcal

0.388793 g

4 kcal

0.518391 g

5 kcal

0.647989 g

6 kcal

0.777587 g

7 kcal

0.907185 g

8 kcal

1.0368 g

9 kcal

1.1664 g

10 kcal

1.296 g

11 kcal

1.4256 g

12 kcal

1.5552 g

13 kcal

1.6848 g

14 kcal

1.8144 g

15 kcal

1.944 g

16 kcal

2.0736 g

17 kcal

2.2032 g

18 kcal

2.3328 g

19 kcal

2.4624 g

20 kcal

2.592 g

21 kcal

2.7216 g

22 kcal

2.8512 g

23 kcal

2.9808 g

24 kcal

3.1103 g

25 kcal

3.2399 g

26 kcal

3.3695 g

27 kcal

3.4991 g

28 kcal

3.6287 g

29 kcal

3.7583 g

30 kcal

3.8879 g

31 kcal

4.0175 g

32 kcal

4.1471 g

33 kcal

4.2767 g

34 kcal

4.4063 g

35 kcal

4.5359 g

36 kcal

4.6655 g

37 kcal

4.7951 g

38 kcal

4.9247 g

39 kcal

5.0543 g

40 kcal

5.1839 g

References

Brazier, Yvette, How many calories do you need?, Medical News Today, https://www.medicalnewstoday.com/articles/263028
Guth, E., Healthy Weight Loss, JAMA, 2014, 312(9), 974. https://jamanetwork.com/journals/jama/fullarticle/1900513