Weight Converter
Convert weight units instantly with this free weight converter. Switch between milligrams, grams, kilograms, metric tons, ounces and pounds accurately.
About this tool
Recipes, gym weights, luggage allowances and shipping quotes all use different weight units. A recipe calling for 8 ounces of flour, a dumbbell marked 20 pounds or a parcel limit in kilograms can each stop you cold if you think in a different system.
Our free weight converter translates between milligrams, grams, kilograms, metric tons, ounces and pounds instantly. Enter the weight, pick the units, and the exact conversion appears right away.
How to use
Enter the weight value, choose the unit it is in, choose the unit you want, and press Convert. The result shows immediately. You can run conversion after conversion with no limits and no account needed.
The tool works fully in your browser, so it is fast and your entries stay on your device.
The math behind it
Kilograms are the internal base. Each unit has an exact factor: one pound is 0.45359237 kg, one ounce is 0.028349523125 kg, one metric ton is 1000 kg. The converter multiplies your value by the from-unit factor to get kilograms, then divides by the to-unit factor.
These factors are international definitions, so results are exact. Display rounding keeps the numbers readable without losing meaningful precision.