Weight Converter

Convert among kilograms, grams, milligrams, tonnes, pounds, ounces, and stones.

Mass
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Common Benchmarks

Average newborn 7.5 lb
Gallon of water 8.34 lb
Bowling ball 16 lb
Bag of flour 5 lb
Road bike frame 2 lb
Microwave oven 35 lb

Formula

kg = g × 0.001

Example

Example: convert 18 grams to kilograms.

18 g = 0.018 kg

Conversion table

grams (g) kilograms (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

Explanation

Grams are used for small masses, food portions, and lab measurements, while Kilograms are the metric unit of mass used worldwide.

How to convert grams to kilograms

  1. Start with the value in grams (g).
  2. Multiply it by 0.001.
  3. The result is the measurement in kilograms (kg).

Example: 18 g → 0.018 kg

Frequently Asked Questions

How much is 18 grams in kilograms?

18 grams equals 0.018 kilograms.

How many kilograms is 1 gram?

1 gram equals 0.001 kilograms.

How many grams is 1 kilogram?

1 kilogram equals 1000 grams.

What is the difference between grams and kilograms?

Both measure mass. The main difference is scale and common usage: {FromPlur} are used for smaller masses (ingredients, food labels, and lab work); {ToPlur} are used worldwide as the SI standard (science, shipping, labels, and body weight).

Where are grams and kilograms used?

In practice: {FromPlur} are used for smaller masses (ingredients, food labels, and lab work); {ToPlur} are used worldwide as the SI standard (science, shipping, labels, and body weight).

Why does 1 gram equal 0.001 kilograms?

Because 1 gram equals exactly 0.001 kg.