Gram to Kilogram Converter
Weight · unit-converter
Convert Gram to Kilogram with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Gram (g)
To: Kilogram (kg)
About Gram
The gram is one thousandth of a kilogram. Recipes, lab work, and small masses typically use grams.
About Kilogram
The kilogram is the SI base unit of mass (defined via fundamental constants). Everyday metric weights and science use kilograms and grams.
How to convert grams to kilograms
1 gram is equal to 0.001 kilogram:
1 g = (1 g ÷ 1000 g) kg = 0.001 kg
Each gram is defined as 1 g and each kilogram as 1000 g, so one g equals 1 ÷ 1000 kg = 0.001 kg.
Let w(g) be the numeric value of the same mass measured in Gram (g), and w(kg) the value in Kilogram (kg). Then:
w(kg) = w(g) × (1 / 1000)
Equivalently, divide by how many g fit into one kg (grams per kg divided by grams per g):
w(kg) = w(g) ÷ 1000
Or: kilogram = gram ÷ 1000
Examples
Example #1: Convert 20 g to kilogram
20 g = 20 g × (1/1000) kg = 0.02 kg
20 g = 20 g ÷ 1000 = 0.02 kg
Example #2: Convert 50 g to kilogram
50 g = 50 g × (1/1000) kg = 0.05 kg
50 g = 50 g ÷ 1000 = 0.05 kg
Summary
To convert Gram to Kilogram, multiply the value in g by the ratio of grams per g divided by grams per kg. Equivalently: value_kg = value_g × (1 / 1000). Numerically, 1 g equals 0.001 kg.
Relationship context
Both units are metric (SI) and tied to the gram via the kilogram. Conversions use exact ratios from their gram definitions. The factor from Gram to Kilogram is 1.000000e-3 (1 g = 0.001 kg).
Conversion tables
| Gram (g) | Kilogram (kg) |
|---|---|
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| Gram (g) | Kilogram (kg) |
|---|---|
| 10 | 0.01 |
| 20 | 0.02 |
| 30 | 0.03 |
| 40 | 0.04 |
| 50 | 0.05 |
| 60 | 0.06 |
| 70 | 0.07 |
| 80 | 0.08 |
| 90 | 0.09 |
| 100 | 0.1 |