Grams to Kilograms (g to kg) Converter & Formula
1 gram equals 0.001 kilograms — divide the number of grams by 1,000 (or multiply by 0.001) to convert to kilograms. There are exactly 1,000 grams in a kilogram, so this is a simple decimal-point shift. ByteTools applies the exact factor as you type.
The formula
To convert grams to kilograms, multiply by 0.001:
kg = g × 0.001
For example, 500 grams × 0.001 = 0.5 kilograms. To reverse it, multiply kilograms by 1,000.
Conversion table
| Grams (g) | Kilograms (kg) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1000 | 1 |
How to convert online
- Type the number of grams into the first box.
- Read the kilograms result instantly in the second box.
- Type a kilogram value instead to convert back to grams — it works both ways.
Use the Gram to Kilogram Converter — free and instant in your browser.
Where this conversion is used
Grams-to-kilogram conversions are constant in cooking and baking, nutrition labels, shipping weights, science labs and fitness tracking. Recipes and packages often list grams while scales and freight quotes use kilograms, so a quick divide by 1,000 keeps everything consistent.
FAQ
How many kilograms are in a gram?
One gram equals 0.001 kilograms. So 100 grams is 0.1 kg and 500 grams is 0.5 kg.
What is the formula to convert grams to kilograms?
Multiply grams by 0.001, or divide by 1,000: kg = g / 1000. The converter does this automatically.
How do I convert kilograms back to grams?
Multiply kilograms by 1,000. For example, 2 kg = 2,000 grams.
How many grams are in a kilogram?
Exactly 1,000 grams make one kilogram, which is why 1000 g converts to 1 kg in the table above.
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