How to convert kilograms to grams
One kilogram equals 1,000 grams, so multiply the number of kilograms by 1,000:
g = kg × 1,000
kg = g ÷ 1,000 (1 g = 0.001 kg)
Example: 0.25 kg → 0.25 × 1,000 = 250 g.
Going the other way, divide by 1,000, or multiply by 0.001; the grams to kilograms converter does it for you.
Everyday values
| Kilograms | Grams | For example |
|---|---|---|
| 0.25 kg | 250 g | a pack of butter |
| 0.5 kg | 500 g | half a kilo |
| 1 kg | 1,000 g | one kilogram |
| 2.5 kg | 2,500 g | a fitness dumbbell |
| 5 kg | 5,000 g | a bag of rice |
When you need this conversion
One kilogram is 1,000 grams, so multiply by 1,000. Recipes often switch between the two: 0.45 kg of flour is 450 g.
Kilogram to gram conversion table
| kg | g | kg | g |
|---|---|---|---|
| 0.1 kg | 100 g | 1.3 kg | 1,300 g |
| 0.2 kg | 200 g | 1.4 kg | 1,400 g |
| 0.3 kg | 300 g | 1.5 kg | 1,500 g |
| 0.4 kg | 400 g | 1.6 kg | 1,600 g |
| 0.5 kg | 500 g | 1.7 kg | 1,700 g |
| 0.6 kg | 600 g | 1.8 kg | 1,800 g |
| 0.7 kg | 700 g | 1.9 kg | 1,900 g |
| 0.8 kg | 800 g | 2 kg | 2,000 g |
| 0.9 kg | 900 g | 2.1 kg | 2,100 g |
| 1 kg | 1,000 g | 2.2 kg | 2,200 g |
| 1.1 kg | 1,100 g | 2.3 kg | 2,300 g |
| 1.2 kg | 1,200 g | 2.4 kg | 2,400 g |
About the units
- Kilogram (kg): the SI base unit of mass, defined through the Planck constant since 2019.
- Gram (g): one thousandth of a kilogram.
Both are units of weight (mass). The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many grams are in one kilogram?
One kilogram is 1,000 grams. One gram is 0.001 kilograms.
How do I convert kilograms to grams?
Multiply the value in kilograms by 1,000. To go back, divide by 1,000.
What is 0.25 kg in grams?
0.25 kg = 250 g.
What is 0.5 kg in grams?
0.5 kg = 500 g.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.