Calculate cost per ton-mile to compare freight efficiency across shipments of different weights and distances. Key metric for bulk and heavy freight.
Cost per ton-mile (CPTM) normalizes freight costs by both weight and distance, making it the definitive metric for comparing the efficiency of moving heavy goods. A $5,000 shipment of 20 tons over 500 miles is $0.50 per ton-mile, while a $3,000 shipment of 10 tons over 400 miles is $0.75 per ton-mile — the first is clearly more efficient.
This metric is especially valuable for bulk commodities, heavy freight, and intermodal comparisons. Rail, barge, and truck have vastly different cost-per-ton-mile profiles, and understanding these differences drives mode selection decisions that can save thousands per shipment.
Use this calculator to compute CPTM for any shipment, compare carrier efficiency on weight-heavy lanes, and evaluate whether mode shifts make economic sense for your freight mix.
Supply-chain managers, warehouse operators, and shipping coordinators rely on precise cost per ton-mile data to maintain efficiency and control costs across complex distribution networks. Revisit this calculator whenever conditions change to keep your logistics plans aligned with real-world performance.
Simple cost-per-mile ignores shipment weight, making it useless for comparing a 5-ton delivery with a 40-ton truckload. CPTM accounts for both dimensions, giving you a universal efficiency metric. This is critical for industries like mining, agriculture, and manufacturing where payload optimization directly impacts profitability. Real-time recalculation lets you model different scenarios quickly, ensuring your logistics decisions are backed by accurate, up-to-date numbers.
Cost per Ton-Mile = Total Freight Cost / (Tons × Miles) Ton-Miles = Weight (tons) × Distance (miles) Total Freight Cost = CPTM × Tons × Miles
Result: CPTM = $0.34
Ton-miles = 22 × 650 = 14,300. CPTM = $4,800 / 14,300 = $0.336 per ton-mile. For comparison, rail CPTM is typically $0.02-$0.05, making it worth investigating for this distance and weight.
The cost per ton-mile varies dramatically by mode. Ocean shipping is the cheapest at fractions of a cent, followed by pipeline, barge, rail, and finally truck. Understanding these differences is the foundation of mode optimization for heavy freight. Even partial mode shifts — like using rail for the long-haul segment — can dramatically reduce CPTM.
The most direct way to improve CPTM is to increase payload per shipment. Ensure trucks are loaded to legal maximums, optimize pallet configurations, and consider trailer types that allow more weight. On the distance side, routing optimization reduces wasted miles.
Presenting CPTM data in carrier negotiations demonstrates sophistication and fairness. Carriers respect shippers who understand their cost structure. Use CPTM benchmarks by lane and commodity type to set target rates that are aggressive but achievable.
A ton-mile is one ton of freight moved one mile. It's the standard unit for measuring freight transportation output. A 20-ton shipment moved 100 miles equals 2,000 ton-miles regardless of the mode of transport.
It depends heavily on mode. Barge: $0.01-$0.03, Rail: $0.02-$0.05, Truck: $0.10-$0.50. Within trucking, dedicated lanes, full truckloads, and longer distances achieve lower CPTM. LTL and short-haul have higher CPTM.
Cost per mile ignores weight — a half-empty truck and a full truck cost the same per mile. CPTM factors in payload, rewarding efficient loading. It's the better metric when shipments vary in weight.
Be consistent. In the US, a short ton (2,000 lbs) is standard. Internationally, metric tonnes (2,204.6 lbs) are used. Just ensure all comparisons use the same unit. This calculator works with either as long as you're consistent.
CPTM is less useful for lightweight, high-volume freight that cubes out before weighing out. For those shipments, cost per cubic foot-mile or cost per pallet-mile may be better metrics since the constraint is volume, not weight.
If your CPTM by truck is $0.30 and rail can achieve $0.04 for the same lane, the savings justify the added transit time and handling. Calculate the total savings and compare against the cost of slower delivery and additional transloading.