Load Factor Calculator — Trailer Utilisation & Capacity
Measure how efficiently your trailers are being used. Calculate load factor by weight and by volume to identify consolidation opportunities and reduce cost per unit.
📦 Load Factor Calculator
How to Use This Calculator
- Enter actual load weight — total weight of freight loaded on the trailer in pounds.
- Set max weight capacity — defaults to 45,000 lbs for a 53-ft dry van. Adjust for reefer, flatbed or smaller trailers.
- Enter actual volume — optional but useful for light/bulky freight where cube fills before weight capacity.
- Review limiting factor — whichever constraint — weight or volume — fills first determines your true load factor.
Worked Example
A shipper loads 28,000 lbs of furniture occupying 2,100 ft³ into a 53-ft trailer (45,000 lb / 2,385 ft³ capacity).
- Weight factor: 28,000 ÷ 45,000 = 62.2%
- Volume factor: 2,100 ÷ 2,385 = 88.1%
- Limiting factor: Volume — the trailer cubes out before it weighs out
The furniture is bulky relative to weight, so volume is the binding constraint. The shipper cannot add meaningful weight without also adding volume. To improve, they could look at denser packaging or stackable product configurations.
Frequently Asked Questions
For FTL shipments, 85–95% weight or volume utilisation is excellent. 70–85% is acceptable. Below 70% means you're likely paying for capacity you're not using — consider LTL or consolidation for lighter loads.
A standard 53-ft dry van trailer holds approximately 45,000–47,000 lbs of freight and 2,385 cubic feet (53 ft × 8.5 ft × 9 ft interior). A 48-ft trailer holds about 43,000 lbs and 2,160 cubic feet.
"Cubing out" means the trailer runs out of cubic space before reaching the weight limit. Common with bulky, lightweight freight like furniture, mattresses, and foam. The opposite — "weighing out" — happens with dense freight like steel, stone or canned goods.
Higher load factor means lower cost per unit. If you ship a full trailer for $2,500 at 80% load factor, your effective cost is $2,500. At 100% load factor with the same freight cost, the per-pallet rate drops proportionally. This is why consolidation programs and load planning tools pay for themselves.