Convert weight and mass units — kilograms, pounds, ounces, grams, tons, stones.
| Unit | Name | Value |
|---|---|---|
| kg | Kilogram | 0.001 |
| mg | Milligram | 1000 |
| t | Metric Ton | 0.000001 |
| lb | Pound | 0.0022046244 |
| oz | Ounce | 0.035273991 |
| st | Stone | 0.00015747312 |
The Gram (g) and the Kilogram (kg) are both units of weight & mass. Converting between them is straightforward using the formula above.
Formula: 1 g = 0.001 kg
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
| Gram (g) | Kilogram (kg) | Real-world context |
|---|---|---|
| 1 g | 0.001 kg | large paperclip |
| 100 g | 0.1 kg | small apple |
| 1000 g | 1 kg | 1 kg = bottle of water |
| 10000 g | 10 kg | |
| 100000 g | 100 kg |
1 gram (g) equals exactly 0.001 kilograms (kg). Use the formula: g × 0.001 = kg.
To convert grams to kilograms, multiply your value in grams by 0.001. For example, 5 g × 0.001 = 0.005 kg.
100 grams = 0.1 kilograms. Calculation: 100 × 0.001 = 0.1.
To convert kilograms back to grams, divide by 0.001 (or multiply by 1000). Example: 10 kg ÷ 0.001 = 10000 g.
Yes. This converter uses the internationally recognised exact conversion factor: 1 g = 0.001 kg. All calculations are performed in your browser with no rounding until display.
10 grams = 0.01 kilograms. Simply multiply by 0.001.
Converting grams to kilograms is commonly needed for everyday tasks like cooking recipes, body weight tracking, shopping internationally, or shipping parcels where one system uses g and another uses kg.
The gram (g) is a unit of mass in the metric system equal to one-thousandth of a kilogram (0.001 kg). While the kilogram is the SI base unit, the gram is the practical everyday unit for small masses in cooking, pharmacy, chemistry, and nutrition labelling. The word derives from Late Latin gramma (small weight), itself from Greek.
The kilogram (kg) is the SI base unit of mass — one of seven fundamental units in the International System. Equal to exactly 1,000 grams, it is the foundation of weight measurement in science, medicine, engineering, and commerce worldwide. Uniquely among SI base units, the kilogram is named with a metric prefix ("kilo-" = 1,000).
Defined in 1795 by the French Academy of Sciences as the mass of one cubic centimetre of pure water at 4 °C — this made 1 mL of water weigh almost exactly 1 gram. The gram was the practical base of early metric calculations before the kilogram took over as SI base unit in 1875. The relationship 1 mL water ≈ 1 g is still a useful approximation in cooking and chemistry.
Interesting fact: A standard large paperclip weighs about 1 gram. The gram forms the basis for milligram (mg), microgram (μg), and tonne (10⁶ g) through SI prefixes.
Defined in 1795 by the French Revolutionary government as the mass of one cubic decimetre of distilled water at 4 °C. A platinum prototype (the Kilogramme des Archives) was created in 1799. From 1889 until 2019, the world's mass standard was the International Prototype Kilogram — a platinum-iridium cylinder stored in Sèvres, France. In 2019, the kilogram was redefined in terms of Planck's constant (h = 6.626 070 15 × 10⁻³⁴ J·s), eliminating the need for a physical artifact.
Interesting fact: The IPK and its official copies drifted apart by up to 50 micrograms over 130 years, motivating the 2019 redefinition. The kilogram is the only SI unit whose name starts with a prefix.