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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

FBA fulfillment fees

Monthly inventory storage fees

Long-term storage fees

FBA inventory storage overage fees

FBA removal order fees

FBA disposal order fees

Fulfillment fees for Multi-Channel Fulfillment orders

FBA Inventory Placement Service fees

FBA Prep Service fees

Related terms

Dimensional weight

Product size tier

Product dimensions and volume

Unit weight

FBA fees reimbursement policy: Weight and dimensions

How to determine the shipping weight


  1. Determine the product volume and dimensions of the item.
  2. Determine the product size tier of the item.
  3. Determine the unit weight of the item.
  4. Determine the dimensional weight and if it is used to calculate the fees for the item.
  5. Use the table below to determine the shipping weight of the item.

Standard size and special oversize

The shipping weight is calculated for each unit using the unit weight. Shipping weight in the small standard and large standard size tiers under 1 lb is calculated by rounding up to the nearest whole ounce. For the remaining size tiers, the shipping weight (see details below) is calculated by rounding up to the nearest whole pound.

Large standard-size items weighing more than 0.75 lb, small oversize, medium 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 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. The total shipping weight for each unit is rounded up to the nearest pound.

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.)

Standard size (0.75 lb or less) Unit weight1
Standard size (more than 0.75 lb) The greater of the unit weight1 or dimensional weight2
Oversize The greater of the unit weight1 or dimensional weight2
Special oversize Unit weight1

1 The unit weight is the weight of an individual unit in manufacturer-provided product packaging.

2 For 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.

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.

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