Grams to kg
One g equals 0.001 kg. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| grams | kg |
|---|---|
| 1 g | 0.001 kg |
| 2 g | 0.002 kg |
| 3 g | 0.003 kg |
| 5 g | 0.005 kg |
| 10 g | 0.01 kg |
| 15 g | 0.015 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 |
| 1000 g | 1 kg |
How to use
- Enter the number of grams in the field.
- The result in kg updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: kg = g ÷ 1000. Going back the other way, one kg is 1000 g.
Metric units differ by powers of ten
Both units belong to the metric system, so the conversion is a shift of the decimal point: the factor is a power of ten and nothing is lost to rounding.
kg = g ÷ 1000
Frequently asked questions
How many kg are in one grams?
One g is 0.001 kg.
How do I convert grams to kg?
Multiply by the factor: kg = g ÷ 1000.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert kg back to grams?
One kg is 1000 g — or open the reverse page linked below.