Container Loading Space Calculator
Calculate volume and weight utilisation for a shipping container, identify the limiting constraint, and see remaining capacity.
Results
What is it?
Container utilisation measures how fully you are using a shipping container by both volume and weight. FCL (Full Container Load) freight is charged per container regardless of how full it is, so maximising utilisation directly reduces cost per unit. Two constraints apply: the container volume (CBM) and the weight limit (payload). A shipment is limited by whichever constraint is hit first — a limiting factor of 1 means volume-limited, 2 means weight-limited.
How to use
Select the container type, enter your total cargo volume in CBM (use the CBM Calculator), and your cargo weight in metric tons. Select the container payload limit. The calculator shows utilisation percentages for both constraints and remaining capacity in each dimension.
Example scenario
A 20ft container (33.2 m3, 28 ton limit) loaded with 20 m3 of cargo weighing 10 tons: Volume utilisation = 20/33.2 x 100 = 60.2%. Weight utilisation = 10/28 x 100 = 35.7%. The shipment is volume-limited. There are 13.2 m3 and 18 tons of spare capacity — consider whether additional cargo from the same origin can be consolidated.
Pro tip
Target 85-95% volume utilisation for FCL shipments to maximise cost efficiency. If you consistently achieve less than 70%, evaluate whether LCL (Less than Container Load) shipping might be more cost-effective. For heavy, dense goods (e.g., machinery, metals), weight limits are often hit before volume — in that case, a 20ft may need two trips while a 40ft might handle both loads at lower per-unit cost.