Calculating Freight Cost Allocated Per Unit Shipped

Last updated July 2, 2026

Freight cost per unit divides the total shipping cost for a given shipment by the number of individual units contained within it, providing the per-item freight burden that should be incorporated into product cost and pricing calculations. A full truckload shipment costing $2,400 to ship and containing 4,800 units results in a freight cost of exactly $0.50 per unit, a figure that decreases as the truckload becomes more fully utilized and increases when shipping partial loads, since the fixed costs of the shipment are spread across fewer units.

This calculation becomes particularly important when comparing shipping methods or evaluating minimum order quantities for retail or wholesale customers. A customer ordering a small quantity that only fills 20 percent of a truck's capacity but still requires a dedicated shipment effectively pays a much higher freight cost per unit than a customer ordering a full truckload, even if both are quoted the same per-unit product price before freight. Businesses that do not account for this freight cost variation by order size frequently find that smaller orders are substantially less profitable than larger orders once true delivered cost is calculated, even when the product margin appears identical on paper.

The calculation shows freight cost per unit for every shipment size your business handles, not just your typical or average order size, since small orders carry disproportionately higher freight burden per unit. Use this calculation to set minimum order quantities or freight surcharges for small orders that would otherwise erode profitability once true delivered cost, including freight, is properly accounted for.