How to convert grams to kilograms
To convert a measurement in grams to kilograms, multiply the value by 0.001. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 g to kilograms: 5 × 0.001 = 0.005 kg.
What is a gram?
A gram is a metric unit of mass equal to one thousandth of a kilogram (0.001 kg) or about 0.035 ounces. Defined in 1795 as the mass of one cubic centimeter of water at the temperature of melting ice. The gram is the base for many everyday metric masses and the reference point for nutritional labeling worldwide.
Common uses of grams include: Cooking and recipe ingredient quantities; Nutrition labels and food portions; Postage and small parcel weight; Jewelry and precious metal weighing.
What is a kilogram?
A kilogram is the SI base unit of mass, equal to 1,000 grams or approximately 2.205 pounds. Originally defined in 1795 as the mass of one liter of water, the kilogram was fixed by a platinum-iridium cylinder from 1889 until 2019, when it was redefined in terms of the Planck constant. It is the only SI base unit whose name carries a prefix.
Common uses of kilograms include: Body weight in most countries; Grocery and produce pricing (price per kg); Shipping and freight weight; Scientific and laboratory mass measurements.
Grams to kilograms worked examples
Here are some common values converted:
1 g = 0.001 kg 5 g = 0.005 kg 10 g = 0.01 kg 50 g = 0.05 kg 100 g = 0.1 kg
Frequently asked questions
How many kilograms are in one gram?
One gram (g) equals 0.001 kilograms (kg). Multiply any value in grams by 0.001 to convert to kilograms.
How do I convert grams to kilograms?
Multiply the value in grams by 0.001. For example, 5 g × 0.001 = 0.005 kg.
How do I convert kilograms to grams?
Multiply the value in kilograms by 1,000, or divide by 0.001. Use the swap button on the converter above to reverse the direction.
Is the gram to kilogram conversion exact?
Yes. Since 1959 the international pound is defined as exactly 0.45359237 kg, so all weight conversions between metric and avoirdupois units use exact factors.
What is the formula for grams to kilograms?
The formula is: kg = g × 0.001. This comes from the definition of both units relative to the kilogram.