Weight Converter

Weight is measured differently almost everywhere you look. US kitchen scales and gym equipment default to pounds, most of the world uses kilograms, the UK still weighs people in stone, recipes swap between grams and ounces depending on where they're published, and shipping labels sometimes list weight in three different units on the same box.

Our weight converter handles kilograms, pounds, ounces, grams, tons, and stone in one place. Enter a value in any unit and instantly see the equivalent across all the others — no need to remember that a stone is 14 pounds or that a kilogram is about 2.2 pounds.

Whether you're tracking a fitness goal listed in kilograms on an app but familiar in pounds, following a British recipe that calls for grams, or checking an airline's baggage weight limit before a flight, this tool gives you a precise, instant answer.

Weight conversion mistakes show up in kitchens, gyms, hospitals, and airports. Baking is especially unforgiving — mistaking grams for ounces in a recipe can throw off ratios badly enough to ruin bread or pastry, since baking (unlike cooking) depends on precise proportions of flour, sugar, and liquid.

Fitness tracking is another common flashpoint: many international apps and equipment display weight in kilograms, which can be confusing for someone used to thinking in pounds, making it hard to judge whether a 5 kg plate increase is a big jump (it's about 11 lbs). Air travel adds real financial stakes — airlines often set baggage limits in kilograms (commonly 20-23 kg for checked luggage), and packing based on a pounds-based mental estimate can trigger unexpected overweight fees at check-in. Medical dosing, especially for children's medication calculated by body weight, also depends on accurate kg-to-lb conversion, since US parents often know a child's weight in pounds while dosage charts are written in kilograms.