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:

Namem3/mtCubic foot/mt
Stone1,3949
Coal tar pitch1,33 -1,5647 – 55
Cake1,3 – 1,8446 – 65
Ammonium sulphate1,19 – 1,2742 – 45
Carbon / anthracite large1,2745
Coal Australia1,22 – 1,3343 – 47
Coal Japan1,27 – 1,3345 – 47
Coal USA1,3 – 1,4246 – 50
Coal Poland1,36 – 1,4448 – 51
Coal Welsh1,19 – 1,2742 – 45
Oats1,87 – 1,89 66 – 67
Bauxite0,85 – 0,9330 – 33
Buckwheat1,53 – 1,654 – 57
Potatoes1,42 – 1,5650 – 55
Raw sugar in Bolivia1,27 – 1,44 45 – 51
Sugar beet3,71131
Sugar beet pulp pellets1,56 – 1,8455 – 65
Sugar Cuba1,3 – 1,3246 – 47
Salt0,99 – 1,1335 – 40
Ferro-se0,725
Ferrochrome0,4215
Phytophylitis0,8430
Phosphate North Africa0,65 – 0,8523 – 30
Iron ore Barahanda1,9 – 2,367 – 81
Iron ore Canada0,7426
Iron ore in Mauritania0,8229
Iron ore in Sierra Leone0,7426
Iron ore Poti0,7426
Iron ore on the island of the Philippines0,7125
Iron ingots0,7928
Graphite0,57 – 0,9920 – 35
Grains1,2544
Guanan1,19 – 1,2542 – 44
Kainit0,99- 1,0535 – 37
Potassium nitrate1,0236
Potassium sulphate1,2644
Kaolin (Chinese clay)1,1340
Kapok India1,8 – 264 – 71
Bone meal calcinet3106
Cast iron0,2810
Chinese clay1,346
Cobalt0,5720
Coconut3,96140
Copra2,35 – 2,7783 – 98
Cogora extract granules1,58 – 1,756 – 60
Cogora pellets1,7863
Coarse shavings1,58 – 1,756 – 60
Kuanite0,7 – 0,8425 – 30
Corn1,45 – 1,5351 – 54
Maize YF11,2845
Corn USA1,39 – 1,749 – 60
Corn Kong1,56 – 1,5855 – 56
Corn South Africa1,42 – 1,5 50 – 53
Maize East Africa1,42 – 1,4750 – 52
Corn WD11,3447
Corn gluten granules in the USA1,53 – 1,7354 – 61
Corn WD1,3648
Copper concentrate0,518
Wheat1,27 – 1,4245 – 50
Wheat Black Sea1,19 – 1,2742 – 45
Field spat0,8530
Magnesite fine0,4516
Magnesite Klinker1,760
Manganese0,7 – 0,8425 – 30
Cotton seeds1,8465
Cotton seed oil1,1340
Molasses0,7928
Barley1,47 – 1,5652 – 55
Barley C11,48 – 1,5152 – 53
Barley C21,56 – 1,5955 – 56
Barley C31,67 – 1,759 – 60
Clay0,7 – 0,8425 – 30
Palm kernels1,6458
Pitch1,3648
Pyridite0,85 – 0,9930 – 35
Potasch nitrate1,0236
Peas1,2845
Beans1,42 – 1,5850 – 56
Beans1,2845
Horns2,69 – 2,8395 – 100
Nuts small and large1,3146
Rice bran pellets1,47 – 1,752 – 60
Rye1,36 – 1,4748 – 52
Sal extract granules1,64 – 1,7658 – 62
Locust beans2,38 – 2,5584 – 90
Sunflower Argentina2,1275
Sunflowers USA2,3282
Sunflower Odessa2,32 – 2,43 82 – 86
Sunflower seeds1,81 – 1,95 64 – 69
Bran rice India1,76 – 1,8462 – 65
Linseed1,56 – 1,5855 – 56
Sierra1,08 – 1,1338 – 40
Sand vitreous0,65 – 0,7123 – 25
Soda nitrate0,7426
Soybeans1,58 – 1,6456 – 58
Soybeans USA1,3748
Soybeans Rio Grande1,553
Soybean oil1,139
Sorghum1,6759
Millet1,27 – 1,4445 – 51
Large magnesia0,71 – 0,8525 – 30
St. Stibis Australia0,5720
Super phosphate Casablanca1,553
Super phosphate triple1,04 – 1,3337 – 47
Super Phosphate Triple Tampa1,05 – 1,2237 – 43
Tapioca pellets1,58 – 1,6456 – 58
Copper concentrate 0,56 – 0,6320 – 22
Peanuts husked2,97 – 3,11105 – 110
Peanuts not peeled3 – 3,7 106 – 131
Peanut cake1,62 – 1,9557 – 69
Fish meal (anchovies)1,61 – 2,0757 – 73
Fish meal (anchovies)1,52- 1,6154 – 57
Gravel0,6523

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:

Cubic foot / Large tonCubic foot / Metric tonCubic meter / Metric tonCubic meter / Large tonLarge ton / Cubic meter Metric ton / Cubic meter
      
3534,450,9750,9911,0091,025
4039,371,1151,1330,8830,898
4140,351,1431,1610,8610,875
4241,341,1711,1890,8410,854
4342,321,1991,2180,8210,834
4443,311,2261,2460,8030,815
4544,291,2541,2740,7850,797
4645,271,2821,3030,7680,780
4746,261,3101,3310,7510,763
4847,241,3381,3590,7360,748
4948,231,3661,3880,7210,732
5049,211,3931,4160,7060,718
5150,191,4211,4440,6920,704
5251,181,4491,4720,6790,690
5352,161,4771,5010,6660,667
5453,151,5051,5290,6540,664
5554,131,5331,5570,6420,652
5655,121,5611,5860,6310,641
5756,101,5891,6140,6200,629
5857,081,6161,6420,6090,619
5958,071,6441,6170,5990,608
6059,051,6721,6990,5890,598
6160,401,7001,7270,5790,588
6261,021,7281,7560,5700,579
6362,011,7561,7840,5610,570
6462,991,7841,8120,5520,561
6563,971,8121,8410,5430,552

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.