ConvBolt — Unit ConverterGrams to Kilograms Converter
Converting grams to kilograms is a multiplication by a fixed factor: 1 g = 0.001 kg. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one gram works out to 0.001 kg, the kilogram is the far smaller unit of the two: a figure given in kilogram always carries a smaller number than the same measurement in gram. A chart drawn in g can hide that, so check which label the axis uses before you compare two readings.
Cooking and shipping are the two places this pair appears most: a kitchen scale reads in grams while a recipe or label is written in kilograms, and a courier tariff built on kilograms still has to be checked against a scale showing grams.
The conversion factor used here is 0.001 kg per gram (3 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 g a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 1000 g per kg, the exact reciprocal, so a round trip through both pages returns your original number.
Grams to Kilograms formula
Use this formula to convert any gram value to kilograms:
Worked example: 100 g × 0.001 = 0.1 kg.
Grams to Kilograms conversion table
| Grams (g) | Kilograms (kg) |
|---|---|
| 0.5 g | 0.0005 kg |
| 1 g | 0.001 kg |
| 2 g | 0.002 kg |
| 5 g | 0.005 kg |
| 10 g | 0.01 kg |
| 20 g | 0.02 kg |
| 50 g | 0.05 kg |
| 100 g | 0.1 kg |
| 500 g | 0.5 kg |
| 1000 g | 1 kg |
How to convert grams to kilograms
Multiply the gram value by 0.001 to get the equivalent in kilograms. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Kilograms to Grams converter instead of dividing by hand; both pages use the same source factors. For every other g conversion in one place, see the g conversion hub.
Frequently asked questions
How many kilograms are in 1 gram?
1 gram = 0.001 kg.
What is 100 grams in kilograms?
100 g = 0.1 kg.
Is converting grams to kilograms the same as kilograms to grams?
No — the direction changes the multiplier. The reverse conversion (1 kg = 1000 g) is on the Kilograms to Grams page.
Related conversions
Try the ConvBolt Unit Converter for any other weight unit, browse the Weight conversions, or read our conversion guides.