pertonne

Per tonne is a unit used to express the amount or price per metric ton. A tonne, or metric ton, equals 1000 kilograms. The term is commonly written as per tonne or per metric ton, though occasionally seen as a single word, pertonne. In pricing, it denotes currency per tonne, such as dollars per tonne. It is widely used in commodities markets and industrial procurement, including coal, iron ore, grains, cement, and fertilizer, as well as in energy products and carbon trading.

In carbon markets, per tonne commonly refers to per tonne of CO2 or CO2 equivalent (CO2e) emitted or controlled. In logistics, freight charges often quote per tonne to reflect weight-based pricing; shipments may also be described in tonne-kilometers or tonne-miles for efficiency.

Calculation: Total cost = unit price per tonne × number of tonnes. Since 1 tonne equals 1000 kilograms, the unit is closely tied to the metric system. It is distinct from the US short ton (2000 pounds, about 907.1847 kg) and the imperial long ton (2240 pounds, about 1016.047 kg).

Examples: A shipment priced at 50 USD per tonne for 3 tonnes costs 150 USD. A carbon credit priced at 15 USD per tonne CO2e represents 3 tonnes CO2e for 45 USD.

See also: metric ton, short ton, long ton, tonne-mile.