About the Weight Converter
Weight and mass are measured differently around the world. Our weight converter supports both metric units (milligrams, grams, kilograms, tonnes) and imperial / US customary units (ounces, pounds, stones, US tons, imperial tons). Whether you are cooking, shipping, or tracking fitness, this tool gives you instant, accurate conversions.
How it works
All units are defined relative to the kilogram — the SI base unit of mass. Your input is first converted to kilograms, then every other unit is derived from that base value. One pound is exactly 0.45359237 kg, one stone is 14 pounds, and one tonne is 1,000 kg.
Common conversions
Need to convert kg to lbs for a gym workout? Or grams to ounces for a recipe? One kilogram equals approximately 2.2046 pounds. One ounce is about 28.35 grams. All calculations run entirely in your browser — no data is sent to any server.