Shipping weight
| Definition | Shipping weight is the rounded item weight. The shipping weight is calculated based on the item’s unit weight or dimensional weight. |
| Using this article | The shipping weight of an item is used to calculate FBA fulfillment fees. After reading this article, you will be able to determine the shipping weight for an item. To accomplish this task, you should first know the unit weight, product volume and dimensions, the dimensional weight, and the product size tier of the item. |
| Fees that use this attribute |
Monthly inventory storage fees FBA inventory storage overage fees Fulfillment fees for Multi-Channel Fulfillment orders |
| Related terms |
How to determine the shipping weight
- Determine the product volume and dimensions of the item.
- Determine the product size tier of the item.
- Determine the unit weight of the item.
- Determine the dimensional weight and if it is used to calculate the fees for the item.
- Use the table below to determine the shipping weight of the item.
Shipping weight is determined by the unit weight or dimensional weight, depending on size tier and which is greater. Dimensional weight is equal to the unit volume (length x width x height) divided by 139. The dimensional weight for oversize items assumes a minimum width and height of 2 inches.
Starting January 18, 2022, for core FBA and dangerous goods, Amazon will use dimensional weight when it is greater than unit weight for all large standard-size units and all small oversize, medium oversize, and large oversize units. Small standard-size units and special oversize units will use unit weight. This change will also apply to units fulfilled through Multi-Channel Fulfillment and Small and Light.
| Core FBA and dangerous goods | |
|---|---|
| Size tier | Shipping weight
(If less than 1 lb, round up to nearest whole ounce. If 1 lb or over, round up to nearest whole pound.) |
| Small standard size | Unit weight |
| Large standard size | The greater of the unit weight or dimensional weight |
| Oversize | The greater of the unit weight or dimensional weight |
| Special oversize | Unit weight |
For apparel, for all small standard-size and large standard-size units weighing more than 0.75 lb and all small oversize, medium oversize, and large oversize units, Amazon uses dimensional weight when it is greater than the unit weight.
| Apparel | |
|---|---|
| Size tier | Shipping weight
(If less than 1 lb, round up to nearest whole ounce. If 1 lb or over, round up to nearest whole pound.) |
| Small standard size (0.75 lb or less) | Unit weight |
| Large standard size (more than 0.75 lb) | The greater of the unit weight or dimensional weight |
| Oversize | The greater of the unit weight or dimensional weight |
| Special oversize | Unit weight |
Shipping weight examples
| Unit weight greater than dimensional weight | |
|---|---|
 |
Disposable plates Dimensions: 6.3 x 6.2 x 4.8 inches Unit weight: 3 lb Dimensional weight: 1.3 lb Shipping weight: 3 lb (based on unit weight, which is greater than dimensional weight) Product size tier: Large standard-size (2+ lb to 3 lb) |
| Dimensional weight greater than unit weight | |
|---|---|
 |
Glass jars Dimensions: 16.6 x 13.3 x 7.7 inches Unit weight: 6.6 lb Dimensional weight: 12.2 lb Shipping weight: 13 lb (based on dimensional weight, which is greater than unit weight, rounded up to the closest pound) Product size tier: Large standard (3+ lb to 20 lb) |
| Dimensional weight with 2 inch minimum | |
|---|---|
 |
White dry erase board Dimensions: 40 x 1 x 25 inches Unit weight: 4.5 lb Dimensional weight: 14.4 lb, 2-inch minimum applied (40 x 2 x 25, divided by 139) Shipping weight: 15 lb (based on dimensional weight, which is greater than unit weight) Product size tier: Small oversize |
Frequently asked questions
How is unit weight different from shipping weight?
Unit weight is used as an input to calculate the shipping weight. Shipping weight also takes into account the dimensional weight in certain cases. View more details on the Unit weight page.
