How to convert grams to kilograms
To convert grams to kilograms, multiply by 0.001. Weight and mass conversions matter for cooking, shipping, fitness tracking, medicine and trade.
Gram to Kilogram conversion table
| Gram (g) | Kilogram (kg) |
|---|---|
| 0.1 g | 0.0001 kg |
| 0.5 g | 0.0005 kg |
| 1 g | 0.001 kg |
| 2 g | 0.002 kg |
| 3 g | 0.003 kg |
| 4 g | 0.004 kg |
| 5 g | 0.005 kg |
| 10 g | 0.01 kg |
| 20 g | 0.02 kg |
| 25 g | 0.025 kg |
| 50 g | 0.05 kg |
| 100 g | 0.1 kg |
| 500 g | 0.5 kg |
| 1,000 g | 1 kg |
About the units
Gram (g)
A gram is one thousandth of a kilogram and the everyday metric unit for food and small items.
Kilogram (kg)
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019.
How to use this converter
- Type the number of grams (g) in the input box.
- The result in kilograms appears instantly — no button needed.
- See the same value in every other weight unit just below.
- Use “Swap units” to convert kilograms back to grams.
When you’ll use the gram to kilogram conversion
Converting grams to kilograms comes up more often than you might expect — for example when tracking body weight in a different unit, shipping a parcel priced per kilogram, or following a recipe written in grams. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 g = 0.001 kg.
Watch out for these mix-ups
- Mixing the avoirdupois ounce with the fluid ounce (volume).
- Confusing the metric ton (1,000 kg) with the US short ton (907 kg).
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many kilograms are in one gram?
One gram equals 0.001 kilograms. 0.001 is the exact factor used by this converter.
How do I convert grams to kilograms?
Multiply the value in grams by 0.001. To go the other way, multiply kilograms by 1,000.
What is 10 g in kg?
10 g = 0.01 kg. Also, 5 g = 0.005 kg and 100 g = 0.1 kg.
What is the difference between a gram and a kilogram?
A gram is one thousandth of a kilogram and the everyday metric unit for food and small items. The kilogram is the SI base unit of mass, defined through the Planck constant since 2019.
Is this tool free and private?
Yes — the Gram to Kilogram is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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