How the Weight Converter Works
This tool converts between 9 common weight and mass units across both metric and imperial systems. Select a source unit, enter a value, and pick a target unit — the result updates instantly without clicking any button.
The metric side includes micrograms, milligrams, grams, and kilograms. The imperial side includes ounces, pounds, and tons. Stone (used in the UK for body weight) and metric tons are also supported for international use.
Common Weight Conversions
- Kilograms to Pounds: 1 kg = 2.20462 lbs. Multiply kg by 2.205.
- Pounds to Kilograms: 1 lb = 0.45359 kg. Divide pounds by 2.205.
- Ounces to Grams: 1 oz = 28.3495 g. Multiply oz by 28.35.
- Stone to Kilograms: 1 stone = 6.35029 kg. Used in the UK and Ireland for body weight.
Metric vs Imperial Weight Units
Grams and kilograms are the standard for science, medicine, and most countries worldwide. Pounds and ounces are used in the United States for food, body weight, and shipping. This converter handles both systems so you can switch between recipes, shipping labels, and scientific data without manual math.