Kilograms to Grams (kg to g) Converter
1 kilogram equals 1000 grams — multiply the number of kilograms by 1000 to convert to grams. The kilogram and the gram are both SI mass units, and because "kilo" means one thousand, the relationship is exact and never rounds.
The formula
To convert kilograms to grams, multiply by 1000:
grams = kilograms × 1000
For example, 2.5 kg × 1000 = 2500 g. To reverse it, divide grams by 1000.
Conversion table
| Kilograms (kg) | Grams (g) |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
How to convert online
- Type the number of kilograms into the first box.
- Read the equivalent grams instantly in the second box.
- Or enter a gram value to convert back to kilograms — it works both ways.
Use the Kilogram to Gram Converter — free and instant in your browser.
Where this conversion is used
Grams give finer resolution than kilograms, so this conversion shows up in cooking and baking recipes, laboratory measurements, postal and parcel weights, nutrition labels and jewellery. Anytime a bulk kilogram figure needs to be expressed in the smaller everyday unit, multiplying by 1000 gets you there exactly.
FAQ
How many grams are in a kilogram?
Exactly 1000 grams. So 3 kg = 3000 g and 0.5 kg = 500 g.
What is the formula to convert kilograms to grams?
g = kg × 1000. Our converter applies the exact factor automatically so you never round by hand.
How do I convert grams back to kilograms?
Divide by 1000, or multiply by 0.001. For example, 7500 g ÷ 1000 = 7.5 kg.
Is the kilogram-to-gram conversion exact?
Yes. The factor of 1000 is a definition, not an approximation, so results are always precise.
Related converters
- Gram to Kilogram Converter
- Kilogram to Milligram Converter
- Kilogram to Tonne Converter
- Kilogram to Pound Converter
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