Weight Converter
Convert between milligrams, grams, kilograms, metric tons, ounces, pounds, and stone.
Runs entirely in your browser.
Weight and Mass Conversion
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About Weight Converter
Weight conversion is ratio-based. Each unit is defined as a multiple of the gram, so converting means multiplying by the source factor and dividing by the target factor. A pound is defined as exactly 453.59237 grams.
Strictly speaking these are units of mass, not weight. Weight is a force and depends on gravity, while mass does not - but in everyday use the two terms are interchangeable, and every unit on this page measures mass.
Need a different kind of unit? The Unit Converter covers length, weight, temperature, data storage, area, speed, time, and volume on one page.
