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This article applies to selling in: United Kingdom

Unit weight

Definition Unit weight is the measure of how much your product weighs when packaged. The value is used as an input for calculating fees.
Using this article Unit weight is a critical input for determining shipping weight and product size tiers.
Fees that use this attribute

FBA fulfilment fees

Monthly inventory storage fees

Long-term storage fees

FBA inventory storage overage fees

FBA removal & disposal order fees

Fulfilment fees for Multi-Channel Fulfilment orders

FBA Prep Service fees
Related terms

Product size tiers

Dimensional weight

Product dimensions and volume

Shipping weight

FBA fees reimbursement policy: Weight and dimensions

How to determine the unit weight

For new products, you should weigh your fully packaged product. Grams (g) and kilograms (kg) are both used as inputs for fee calculations in Europe.

Important: If a product is sold as a set, the weight and dimensions are the combined total of all of the items in the set packaged together.

For the products that you currently have in FBA inventory, you can look up your unit weight using the Fee Preview report. To do so:

  1. Download the report
  2. Identify the product you are looking for by its FNSKU
  3. View the unit weight in the item-package-weight field

For products that are currently to be sold on Amazon but which you don’t sell yet, you can look up the unit weight using the Revenue Calculator. To do so:

  1. Search for the product of interest
  2. View the Unit weight value

Note: Amazon may verify the weight and dimensions of a product using representative samples. Amazon’s information about a product’s weight and dimensions will be used to calculate fees if there is a difference between Amazon’s information and a seller’s information. Amazon may change its information about a product’s weight and dimensions from time to time to reflect updated measurements. Fees based on the weight and dimensions of a product are calculated using Amazon’s information about the weight and dimensions of that product at the time the fee is calculated.

Frequently asked questions

How is unit weight different from shipping weight?

The unit weight is used as an input for calculating the shipping weight. Shipping weight also considers the dimensional weight in certain cases. For more information, go to Shipping weight.

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