### Stowage factor

The stowage factor (SF) indicates the number of cubic meters (or cubic feet) of space occupied by a given type of cargo in a cargo ship’s hold. This notional amount shall be calculated in order to know the extent necessary for the normal conditions of the loading area, including the losses caused by means of transport and packaging, in relation to the weight of the load.

We use the table of stowage factors (SF) for different bulk cargoes:

The stowage factor is calculated:

one large ton or 2240 pounds multiplied by volume in cubic feet. The result is divided by the weight of the load in pounds. The stowage factor thus determined shall be the number of cubic feet required to load one long tonne of a given load. If you are using a metric measure, the formula is to multiply 1 000 kilograms by volume in cubic metres divided by the weight of the load in kilograms. Let’s say you have a load of 15 cubic feet and 900 pounds. The calculation of the load is 2240 pounds, multiplied by 15, divided by 900. The charging factor is obtained at 37,3 cubic feet per tonne.

Here’s a table of conversion of stowage factors to other units of measure:

In any case, in order to avoid errors and misunderstandings, we recommend setting a stowage factor each time before chartering the cargo by ship. And this will avoid problems when incomplete exhaustion of the ship’s volume or weight and possible “dead freight” invoices from ship owners.

The load comparative weight studies can be carried out by a surveyor, and in the absence of the possibility of hiring a surveyor , the tests can be carried out on their own.

If you have any questions or uncertainties, be sure to contact JSC Onze specialists.