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 |
| 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.
Envelope, parcel and special oversize
Shipping weight in the envelope, parcel and special oversize tiers is calculated based on the unit weight and by mapping the item to the relevant weight tier. For example, if an ASIN has dimensions of 34 x 25 x 6 cm and a unit weight of 1.7 kg, it will qualify for the "Small parcel 1.9 kg" weight tier.
Small oversize, standard oversize, and large oversize
The shipping weight is calculated for each unit by using the greater of the unit weight or the dimensional weight. The dimensional weight (in kg) is equal to the unit volume (length x width x height) divided by 5,000.
| Size tier | Shipping weight |
|---|---|
| Envelope (≤ 33 x 23 x 6 cm) | Unit weight1 |
| Parcel (≤ 45 x 34 x 26 cm) | Unit weight1 |
| Oversize | The greater of the unit weight1 or dimensional weight2 |
| Special oversize (length > 175 cm or girth > 360 cm or unit weight > 31.50 kg) | Unit weight1 |
1 The unit weight is the weight of an individual unit in manufacturer-provided product packaging.
2 For small oversize, standard oversize, and large oversize units, Amazon uses dimensional weight to determine weight tier whenever it is greater than the unit weight
Shipping weight examples
| When the unit weight is greater than the dimensional weight | |
|---|---|
 |
Disposable plates Dimensions: 34 x 24 x 9 cm Unit weight: 1.8 kg Dimensional weight: 1.47 kg Shipping weight: 1.8 kg (based on unit weight for parcel size tier) Product size tier: Small parcel ≤ 1.9 kg |
| When the dimensional weight is greater than the unit weight | |
|---|---|
 |
Keyboard Dimensions: 150 x 20 x 20 cm Unit weight: 6 kg Dimensional weight: 12 kg Shipping weight: 12 kg (based on dimensional weight, which is greater than unit weight) Product size tier: Large oversize ≤ 14.76 kg |
Frequently asked questions
How is unit weight different from shipping weight?
The unit weight is used as an input to calculate the shipping weight. Shipping weight also considers the dimensional weight in certain cases. For more information, go to Unit weight.
