Weight Converter
Convert between grams, kg, tonnes, ounces, pounds, and stones
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About Weight Converter
Convert Between Kilograms, Pounds, Ounces, and More
The world cannot agree on a single weight system, and that creates daily headaches for anyone who works, shops, cooks, or travels across unit boundaries. The Weight Converter bridges the gap instantly, converting between kilograms, pounds, ounces, grams, milligrams, stones, metric tonnes, and other weight units with a single input.
Supported Units
This tool covers the units people actually encounter: kilograms (kg) and grams (g) from the metric system, pounds (lb) and ounces (oz) from the imperial system, stones (used in the UK for body weight), milligrams (mg) for pharmaceutical and scientific measurements, and metric tonnes for industrial quantities. Enter a value in any unit and see equivalent values across all others simultaneously.
Who Uses a Weight Converter Daily
Home cooks and bakers encounter this problem every time they find a recipe from another country. American recipes list flour in cups and butter in ounces. European recipes use grams. A British recipe might call for "8 oz" of sugar while an Australian one says "225 g." Without a converter, you are guessing - and in baking, guessing means failure.
Fitness enthusiasts track body weight and lifting numbers across different gym equipment. One scale reads in kilograms, another in pounds. Your fitness app might use metric while the gym's plates are labelled in pounds. Converting 225 lbs to kg (102.1 kg) or 80 kg to pounds (176.4 lbs) is a daily occurrence.
Travellers encounter weight limits in unfamiliar units. An airline allows 23 kg checked luggage - how much is that in pounds? About 50.7 lbs. Knowing this before you pack prevents surprises at the airport.
Medical professionals calculate drug dosages based on patient weight in kilograms, but patients in some countries report their weight in pounds or stones. Accurate conversion is not optional in medicine - it is safety-critical.
Shipping and logistics teams convert between units constantly. International shipments may list weight in kilograms on one document and pounds on another. Customs declarations, freight charges, and vehicle load limits all require precise conversions.
Students solving physics, chemistry, and engineering problems regularly need to convert between grams, kilograms, and other units. Dimensional analysis is a core skill, and this tool provides instant verification.
How to Use the Weight Converter
Type a number, select the unit you are converting from, and every other unit updates automatically. No button to press, no form to submit - just type and read. If you need to go the other direction, click the unit you want to convert from and enter the new value. The interface is designed for speed because weight conversions are usually quick lookups, not lengthy calculations.
Common Conversions Worth Knowing
1 kilogram equals approximately 2.205 pounds. 1 pound is about 453.6 grams. 1 stone (used in the UK) is 14 pounds or roughly 6.35 kg. 1 ounce is approximately 28.35 grams. These rough figures are useful for mental estimates, but when precision matters - cooking, medicine, shipping - use the weight converter for exact numbers.
Fast and Private
The calculator runs entirely in your browser. No values are stored or transmitted. Whether you are converting your luggage weight at 5 AM before a flight or double-checking a recipe at the kitchen counter, the Weight Converter delivers instant, accurate results on any device.