A ton-mile (or ton-kilometre) is a unit used in the transportation and logistics industry to measure freight movement. It represents moving one ton of cargo one mile (or one kilometre).
For example, if a truck transports 20 tons of freight for 100 miles, it has moved 2,000 ton-miles of freight (20 × 100 = 2,000).
Ton-miles and ton-kilometres help companies measure transportation efficiency, compare freight volumes, calculate costs, and track the overall movement of goods through the supply chain. They are commonly used by trucking companies, railways, shipping lines, and government transportation agencies to evaluate freight activity and network performance.