Convert Stone (US) (st (US)) to Megagram (Mg) instantly.
About these units
Stone (US) (st (US))
The US stone was an informal and nonstandardized unit occasionally used in the 19th century, with no single agreed-upon value. Unlike the British stone (14 pounds), the US stone varied regionally and by trade context, typically ranging from 12 to 16 pounds, depending on the commodity and location. Farmers, butchers, and merchants sometimes used stones to weigh produce, meat, or livestock, but the lack of uniform regulation prevented it from becoming an official or widely adopted unit. Today, the US stone is entirely obsolete, but references to it appear in historical American trade documents, agricultural records, and pre-standardization weight systems. It serves as a reminder of the diversity of early American measurements before the widespread adoption of the avoirdupois pound.
Megagram (Mg)
A megagram, equal to 1,000 kilograms, is identical in quantity to the metric ton (tonne). While "tonne" is common in daily life, Mg is preferred in engineering, environmental science, and formal scientific writing because it is unambiguous and adheres strictly to SI conventions. Megagrams are used to express masses of vehicles, construction materials, waste output, or agricultural yields in large-scale analyses. The unit is especially useful in Earth sciences, where megagram quantities describe biomass, sediment transport, or volcanic emissions.