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Find the Quantity of Desiccant You Need
This is desgned to cover from small packages all the way up to large corporate containers.
For bottles or small foil packages, please click here.
Example 1: You are shipping a photocopier (a medium-sized package) with dimensions 4' x 3' x 2' = 24 cubic feet.
You estimate that the copier takes up 75% of the space inside the package, but to be conservative, you say 70%. This means
that the remaining 30% is free space, and that is 7.2 cubic feet (12442 cubic inches) and the table tells you that you
need 9 units of desiccant. We recommend buying three 4-unit desiccants so you are absolutely certain that you have enough, and maybe a
little to spare.
Example 2: You are shipping a large, custom-built machine/vehicle/power panel which is usually done by a crating
company. The container's volume is 176,000 cubic inches, and the contents take up 30% of the package. This means the free
space is 123,200 cubic inches, and the table tells you that you need more than 80 units of desiccant.
Container Size |
Desiccant Required |
Square Feet | Square Inches | Gallons | Cubic Feet | Cubic Inches |   |
0.1 | 15 | 1.1 | 0.14 | 237 | 1/6 |
0.2 | 30 | 2.1 | 0.28 | 476 | 1/3 |
0.3 | 45 | 3.2 | 0.42 | 714 | 1/2 |
0.6 | 90 | 6.2 | 0.83 | 1428 | 1 |
1.3 | 180 | 12.5 | 1.67 | 2856 | 2 |
1.9 | 270 | 18.7 | 2.50 | 4284 | 3 |
2.5 | 360 | 25.0 | 3.33 | 5712 | 4 |
3.1 | 450 | 31.2 | 4.16 | 7140 | 5 |
3.8 | 540 | 37.4 | 5.00 | 8568 | 6 |
4.4 | 630 | 43.6 | 5.83 | 9996 | 7 |
5.0 | 720 | 50.0 | 6.66 | 11424 | 8 |
5.6 | 810 | 56.1 | 7.50 | 12852 | 9 |
6.3 | 900 | 62.3 | 8.33 | 14280 | 10 |
7.5 | 1080 | 74.8 | 10.00 | 17136 | 12 |
8.8 | 1260 | 87.3 | 11.66 | 19992 | 14 |
10.0 | 1440 | 99.7 | 13.32 | 22850 | 16 |
20.0 | 2880 | 199.4 | 26.64 | 45700 | 32 |
50.0 | 7200 | 498.5 | 66.65 | 114250 | 80 |
100.0 | 14400 | 997.0 | 133.30 | 228500 | 160 |
120.0 | 18000 | 1240.0 | 166.00 | 285600 | 200 |
150.0 | 22500 | 1550.0 | 207.00 | 357000 | 250 |
If you have any questions, please email us.
Please note that a unit of desiccant refers to its drying capacity, not its volume. A unit
(approximately one ounce) is the amount of desiccant that will absorb at least
three grams of water vapor at 20% relative humidity and at least six grams of water vapor
at 40% relative humidity at 77 degrees F (25 degrees C).
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