Convert Ton (Assay) (UK) (AT (UK)) to Metric Ton (t) instantly.
About these units
Ton (Assay) (UK) (AT (UK))
The UK assay ton, slightly different from the US version, is defined as 32.666 grams. Like its American counterpart, it was designed so that milligram-level assay results could be easily interpreted as ounces of metal per ton of ore. In British mining operations of the 19th and early 20th centuries, the UK assay ton streamlined economic decision-making by directly correlating lab-scale measurements with bulk extraction expectations. Although now historical, its existence illustrates how different countries tailored their measurement systems to local mining economics and metal markets.
Metric Ton (t)
The metric ton, or tonne, equals 1,000 kilograms and is used for measuring large masses such as vehicles, industrial shipments, agricultural yields, waste disposal, and construction materials. Its convenient decimal relationship with kilograms makes it easy to use in logistics, industry, and environmental studies. Many countries express carbon emissions in tonnes of CO₂, linking the unit directly to global sustainability efforts. The metric ton contrasts with the US short ton and UK long ton—its exact definition prevents ambiguity in international trade. Its adoption worldwide demonstrates the advantages of standardized mass units in a global economy.