Convert Ton (Assay) (US) (AT (US)) to Microgram (µg) instantly.
About these units
Ton (Assay) (US) (AT (US))
The US assay ton is a specialized unit used in mining and metallurgy for evaluating ore grades. It is defined as 29.166⅔ grams, a very small mass chosen to simplify calculations relating assay results to tons of ore. The idea is that if an assay ton of sample yields 1 milligram of precious metal, then one actual ton of ore contains 1 ounce of that metal. This scaling makes laboratory results directly translatable to mining yields. While obsolete in modern industrial practice, where metric units dominate, the assay ton remains important in historical mining records and for researchers studying early industrial metallurgy.
Microgram (µg)
A microgram is one-millionth of a gram, essential in pharmacology, nutrition science, and chemical analysis. Many vitamins, especially fat-soluble ones like vitamin D and K, are prescribed or measured in micrograms, as exceeding recommended doses can be harmful. In environmental monitoring, pollutant levels—such as airborne particulate matter—are often expressed in micrograms per cubic meter. Researchers working with catalysts or rare biological compounds rely on microgram-scale measurements for precise experiments. The microgram is indispensable in fields requiring tight control over small masses that impact biological or chemical systems significantly.