Weight Unit Converter

Weight Unit Converter

Convert between 8 weight units instantly. Edit any field and all others update automatically — no need to pick a direction or click a button.

Supported units

• Kilogram (kg): SI base unit of mass. 1 kg = 1 000 g.
• Gram (g): common unit for food, medicine, and everyday objects.
• Milligram (mg): used in medicine and chemistry (1 kg = 1 000 000 mg).
• Pound (lb): imperial unit used in the US and UK. 1 lb ≈ 453.59 g.
• Ounce (oz): 1 oz = 1/16 lb ≈ 28.35 g. Used for food and postal weights.
• Stone (st): used for body weight in the UK and Ireland. 1 st = 14 lb ≈ 6.35 kg.
• Metric ton (t): 1 t = 1 000 kg. Used in shipping and industry.
• Microgram (μg): 1 μg = 0.000 001 g. Used in pharmacology and nutrition labels.

Quick reference

• 1 kg = 2.20462 lb = 35.274 oz
• 1 lb = 16 oz = 453.592 g
• 1 stone = 14 lb = 6.350 kg

Step by step

1. Type a value into any field: kilograms, grams, milligrams, pounds, ounces, stone, metric tons or micrograms.
2. All the other fields update instantly, with no direction to choose and no button to press.
3. Use Clear to start over.

Frequently asked questions

How many grams are in a pound?
One pound (lb) is about 453.59 grams.

How many ounces are in a pound?
Sixteen. One ounce is about 28.35 grams.

What is a stone?
A British unit of mass equal to 14 pounds, about 6.35 kg. It is used mainly for body weight in the UK and Ireland.