Mass conversion chart
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Mass / measurement ledger
Weight and Mass Converter
These conversions concern mass even though everyday language often says weight. Supported units: milligram, gram, kilogram, metric tonne, avoirdupois ounce, avoirdupois pound, and US short ton. 1 kilogram = 1000 grams. 1 gram = 1000 milligrams. 1 metric tonne = 1000 kilograms. 1 avoirdupois pound = 0.45359237 kilograms exactly. 1 avoirdupois ounce = 1/16 pound. 1 US short ton = 2000 pounds. Kilograms are the internal base. Troy ounces are not used.
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How This Conversion Works
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Quick examples
US short ton versus metric tonne
A metric tonne is 1000 kg. A US short ton is 2000 lb, which is 907.18474 kg. They are not interchangeable. The converter labels the short ton as ton (US) to keep that difference visible.
Related: How to convert units · Metric vs imperial units