Convert Kilograms to Grams
Convert Kilograms to Grams instantly. 1 Kilogram (kg) equals 1,000 Grams (g).
Kilograms to Grams conversion table
| Kilograms (kg) | Grams (g) |
|---|---|
| 1 kg | 1,000 g |
| 2 kg | 2,000 g |
| 3 kg | 3,000 g |
| 5 kg | 5,000 g |
| 10 kg | 10,000 g |
| 20 kg | 20,000 g |
| 50 kg | 50,000 g |
| 100 kg | 100,000 g |
| 500 kg | 500,000 g |
| 1,000 kg | 1,000,000 g |
1 Kilogram = 1,000 Grams · multiply Kilograms by 1,000
About converting Kilograms to Grams
Kilograms (kg) and Grams (g) are both units of weight & mass, so converting between them is a single multiplication: multiply your Kilograms figure by 1,000. Ten Kilograms comes to 10,000 Grams, and a hundred works out at 100,000 Grams.
Rule of thumb: going from Kilograms to Grams multiplies, so the figure always grows — one Kilogram is already 1,000 Grams. If your answer came out smaller, you have the conversion the wrong way round.
What is a Kilogram?
The kilogram was the last SI unit still defined by a physical object — the International Prototype Kilogram, a platinum-iridium cylinder kept in a vault near Paris since 1889. The problem was that it drifted. Careful comparisons against its official copies showed the masses diverging by tens of micrograms, and because the prototype simply was the kilogram by definition, there was no way to say which side had changed. In 2019 it was redefined in terms of the Planck constant, so any properly equipped lab can now realise a kilogram from physics rather than from an artefact.
What is a Gram?
The gram sits oddly in SI: the kilogram, not the gram, is the official base unit of mass, which makes mass the only quantity whose base unit carries a prefix built into its name. The gram was defined in 1795 as the mass of a cubic centimetre of water at the melting point of ice — a definition that tied mass neatly to length and made the young metric system self-consistent. It survives as the working unit of nutrition labels, recipes, postage and laboratory work: anything small enough that kilograms would force you into decimals.
To put both in perspective: a liter of water weighs about a kilogram, while a paperclip weighs about a gram.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Grams to Kilograms converter, or browse all Weight & Mass converters.
Frequently asked questions
How many Grams are in one Kilogram?
There are 1,000 Grams in one Kilogram.
How do I convert Kilograms to Grams?
Multiply the number of Kilograms by 1,000. For example, 10 Kilograms = 10,000 Grams.
What is 100 Kilograms in Grams?
100 Kilograms is equal to 100,000 Grams.
How do I convert Grams to Kilograms?
Multiply the Grams value by 0.001 (or divide by 1,000).
Is this Kilograms to Grams conversion exact?
Yes, exactly. Both units are fixed against the same base by definition, and 1 Kilogram = 1,000 Grams is the complete value — nothing is rounded away.
What is a Kilogram?
The kilogram was the last SI unit still defined by a physical object — the International Prototype Kilogram, a platinum-iridium cylinder kept in a vault near Paris since 1889. The problem was that it drifted. Careful comparisons against its official copies showed the masses diverging by tens of micrograms, and because the prototype simply was the kilogram by definition, there was no way to say which side had changed. In 2019 it was redefined in terms of the Planck constant, so any properly equipped lab can now realise a kilogram from physics rather than from an artefact.
What is a Gram?
The gram sits oddly in SI: the kilogram, not the gram, is the official base unit of mass, which makes mass the only quantity whose base unit carries a prefix built into its name. The gram was defined in 1795 as the mass of a cubic centimetre of water at the melting point of ice — a definition that tied mass neatly to length and made the young metric system self-consistent. It survives as the working unit of nutrition labels, recipes, postage and laboratory work: anything small enough that kilograms would force you into decimals.