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gram (g) → kilogram (kg)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
g=kg
0.01=0
0.1=0.0001
1=0.001
2=0.002
3=0.003
5=0.005
10=0.01
20=0.02
50=0.05
100=0.1
1000=1

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Brief explanation: gram to kilogram

Kilogram is the base unit of mass in the metric system. Pound ≈ 0.453 kg, ounce = 28.35 g. Ton = 1000 kg. Weight and mass are often used interchangeably in everyday contexts. The metric system (kg, g, mg) is used globally. Pounds and ounces are common in the US and UK. For cooking, grams are precise; for body weight, kg or lb are standard.

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Common conversion examples: gram to kilogram

Reference values for quick comparison. Use the converter above for any amount.

  • 1 gram=0.001 kilogram
  • 10 gram=0.01 kilogram
  • 100 gram=0.10 kilogram

About the Units

gram (g)

Definition: A gram (g) is a unit of mass equal to one thousandth of a kilogram. There are 1,000 grams in one kilogram. It is the metric unit for small masses like food ingredients and postal items.
History: The gram was introduced with the metric system as 1/1000 of the mass of one liter of water. It provided a convenient scale for recipes, chemistry, and small commercial transactions.
Current use: Grams are used for food nutrition labels, recipes, and postal weights. Jewelry and precious metals are often weighed in grams. Chemistry and pharmacy use grams for precise measurements.

kilogram (kg)

Definition: The kilogram (kg) is the base unit of mass in the International System of Units (SI). It is defined by the Planck constant since 2019. One kilogram is approximately the mass of one liter of water at 4°C.
History: The kilogram was originally defined in 1795 as the mass of one liter of water. From 1889 to 2019, it was defined by a platinum-iridium cylinder (the International Prototype Kilogram) stored in Paris. The current definition uses fundamental physical constants.
Current use: The kilogram is the global standard for mass. Body weight, food packaging, and cargo are measured in kilograms worldwide. Science and commerce rely on kilograms. The US still uses pounds for everyday weight.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: