Freight calculators that show their working
What you will be charged, what fits on the truck, and whether the way it is loaded is legal. Working from the divisors and the limits that actually apply, with every step of the arithmetic on screen so you can check it rather than take it on trust.
Calculators
What you will be charged
What fits, and how it goes in
And whether it is legal
Why another calculator site
Most shipping calculators give you a number and stop. That is fine until the number disagrees with a carrier invoice and you need to work out which of you is wrong — and the calculator cannot tell you, because whoever built it did not know either.
Every tool here prints the full arithmetic, names the rule it applied, and says where it stops being reliable. They are written by someone who spends his working day around pallets and loading bays, not by a content agency working from a keyword list. Where a rule has an exception that catches people out — and most of them do — it is written down rather than quietly ignored.
Guides
- Your truck is under 40 tonnes and still illegal — The total tells you nothing about the split. Spanish limits are not the European ones, and the driving axle has a minimum as well as a maximum.
- It fits inside the container. It will not go through the door. — Container tables give internal height. Cargo goes in through the door, which is around 100 mm lower. The gap has stranded a lot of machinery on a lot of quays.
- The strap over your load is not holding it — A strap thrown over the load holds nothing by itself. It presses down; friction does the work. Once you see that, the number on the label stops meaning what you thought.
- The NMFC changed in July 2025. Here is what actually moved — Only freight over 35 lb/ft³ changed class on the density scale. The expensive part of the reform is somewhere else entirely.