Calorie to Body Weight Conversion Calculator

Enter a value in calories below to convert to another unit of weight.

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What Is a Calorie?

The calorie is a unit used to measure energy, but we commonly use refer to it when talking about body weight and weight loss.

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

How Much 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]

How to Convert Calories

To convert calories to another unit of weight, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.^[3]

You can find the conversion factors for calories in the conversion table below.

Then, multiply the weight measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

calories × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

Calorie Conversion Table

Common calorie values and equivalent imperial and metric weight measurements
calories	pounds	ounces	kilograms	grams	milligrams	stones
1000 kcal	0.285714 lb	4.571429 oz	0.129598 kg	129.59782 g	129,598 mg	0.020408 st
2000 kcal	0.571429 lb	9.142857 oz	0.259196 kg	259.19564 g	259,196 mg	0.040816 st
3000 kcal	0.857143 lb	13.714286 oz	0.388793 kg	388.79346 g	388,793 mg	0.061224 st
4000 kcal	1.142857 lb	18.285714 oz	0.518391 kg	518.39128 g	518,391 mg	0.081633 st
5000 kcal	1.428571 lb	22.857143 oz	0.647989 kg	647.9891 g	647,989 mg	0.102041 st
6000 kcal	1.714286 lb	27.428571 oz	0.777587 kg	777.58692 g	777,587 mg	0.122449 st
7000 kcal	2 lb	32 oz	0.907185 kg	907.18474 g	907,185 mg	0.142857 st
8000 kcal	2.285714 lb	36.571429 oz	1.036783 kg	1,037 g	1,036,783 mg	0.163265 st
9000 kcal	2.571429 lb	41.142857 oz	1.16638 kg	1,166 g	1,166,380 mg	0.183673 st
10000 kcal	2.857143 lb	45.714286 oz	1.295978 kg	1,296 g	1,295,978 mg	0.204082 st
11000 kcal	3.142857 lb	50.285714 oz	1.425576 kg	1,426 g	1,425,576 mg	0.22449 st
12000 kcal	3.428571 lb	54.857143 oz	1.555174 kg	1,555 g	1,555,174 mg	0.244898 st
13000 kcal	3.714286 lb	59.428571 oz	1.684772 kg	1,685 g	1,684,772 mg	0.265306 st
14000 kcal	4 lb	64 oz	1.814369 kg	1,814 g	1,814,369 mg	0.285714 st
15000 kcal	4.285714 lb	68.571429 oz	1.943967 kg	1,944 g	1,943,967 mg	0.306122 st
16000 kcal	4.571429 lb	73.142857 oz	2.073565 kg	2,074 g	2,073,565 mg	0.326531 st
17000 kcal	4.857143 lb	77.714286 oz	2.203163 kg	2,203 g	2,203,163 mg	0.346939 st
18000 kcal	5.142857 lb	82.285714 oz	2.332761 kg	2,333 g	2,332,761 mg	0.367347 st
19000 kcal	5.428571 lb	86.857143 oz	2.462359 kg	2,462 g	2,462,359 mg	0.387755 st
20000 kcal	5.714286 lb	91.428571 oz	2.591956 kg	2,592 g	2,591,956 mg	0.408163 st

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

National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion