Free Mass & Weight Converter — kg, lb, oz, Stone & More

Convert between kilograms, grams, milligrams, pounds, ounces, stone, metric tons, and short tons instantly. Ideal for cooking, fitness, shipping and science.

Mass & Weight Converter

Converted Weight

How to Use the Mass & Weight Converter

Select the unit you are converting from in the From dropdown, enter your amount, then choose the target unit in the To dropdown and click Convert. The result shows both the converted value and a plain-language confirmation of the conversion. The calculator handles very large and very small values — from milligrams to metric tons — with 8 significant figures of precision.

Common Mass & Weight Conversions

Metric → Imperial
1 kg2.205 lb
1 kg35.274 oz
1 g0.035 oz
1 tonne = 2,205 lb
Imperial → Metric
1 lb453.59 g
1 oz28.35 g
1 stone6.35 kg
1 short ton = 907 kg
Everyday Examples
Body weight 70 kg154.3 lb
1 cup flour ≈ 125 g4.41 oz
1 pint milk ≈ 485 g1.07 lb
Parcel 5 kg = 11 lb

Frequently Asked Questions

1 kilogram = 2.20462 pounds. To convert kg to lb, multiply by 2.205. To convert lb to kg, divide by 2.205 (or multiply by 0.4536).
1 pound = 453.592 grams. To convert grams to pounds, divide by 453.592.
1 stone = 14 pounds = 6.35029 kilograms. Stone is used primarily in the UK and Ireland for measuring body weight.
Mass is the amount of matter in an object, measured in kg or lb. Weight is the force of gravity on that mass, measured in Newtons. In everyday use the terms are used interchangeably, and bathroom scales actually measure weight and display mass in kg/lb.

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