Grams to kilograms
Multiply grams by 0.001 to get kilograms.
1,000 g = 1 kg
How to convert grams to kilograms
The kilogram is the SI base unit of mass, fixed since 2019 by defining the Planck constant as exactly 6.62607015×10⁻³⁴ J·s. The gram is one thousandth of a kilogram (10⁻³ kg) in the SI.
Worked example — 1,000 g: 1,000 × 0.001 = 1 kg.
Grams to kilograms table
| Grams | Kilograms |
|---|---|
| 100 g | 0.1 kg |
| 250 g | 0.25 kg |
| 500 g | 0.5 kg |
| 750 g | 0.75 kg |
| 1,000 g | 1 kg |
| 2,000 g | 2 kg |
| 5,000 g | 5 kg |
| 10,000 g | 10 kg |
Reverse and related
About grams and kilograms
Gram (g)
1 g = 0.001 kgDefinition. One thousandth of a kilogram (10⁻³ kg) in the SI
History and origin
The gram was the original base of the metric system set out in 1795, defined as the mass of one cubic centimetre of water at the melting point of ice, before the larger kilogram was chosen as the SI base unit. It is now simply one thousandth of a kilogram.
Current use
Grams are the everyday metric unit for small masses: recipe ingredients, nutrition labels, medicine doses and postage.
Source: BIPM, The International System of Units (SI), 9th ed. (2019)
Kilogram (kg)
1 kg = 1,000 gDefinition. The SI base unit of mass, fixed since 2019 by defining the Planck constant as exactly 6.62607015×10⁻³⁴ J·s
History and origin
The kilogram began in 1795 as the mass of one litre of water at the melting point of ice, and from 1889 was embodied in a platinum-iridium cylinder kept near Paris, the International Prototype Kilogram. In 2019 the SI retired that physical artefact and redefined the unit through a fixed value of the Planck constant, leaving its size unchanged.
Current use
It is the base unit of mass almost everywhere on Earth. The main everyday exception is the United States, where people weigh in pounds even though US science, medicine and industry work in kilograms.
Source: BIPM, The International System of Units (SI), 9th ed. (2019)
Where people use this
Grams: recipe and food weights, nutrition labels, postage. Kilograms: body weight outside the US, groceries and produce, checked-luggage limits. 500 g is 0.5 kg.
Every value is carried to full double precision; the display is rounded.
Both units are defined in BIPM, The International System of Units (SI), 9th ed. (2019).
Questions people ask
How many kg is 500 grams?
500 grams is 0.5 kilograms. To convert grams to kg, divide by 1000.
How many grams make a kilogram?
It takes exactly 1000 grams to make one kilogram.
What is 750 g in kg?
750 grams is 0.75 kilograms, and 2000 g is 2 kg.