---
title: Should I enter product dimensions?
description: Learn why product dimensions are important for obtaining accurate shipping rates.
---

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# Should I enter product dimensions?

## Learn why product dimensions are important for obtaining accurate shipping rates.

If the Small Package Quotes application is installed, you should enter dimensions on the product shipping parameters page so that:

1. A packaging solution can be calculate for each order;
2. Accurate rates estimates can be retrieved during the checkout process.

The Small Package Quotes product has a proprietary packaging algorithm that identifies the optimal packaging solution required to ship the order. There is also an optional *standard box sizes* feature that will determine the order's packaging solution using your standard box sizes. In both cases product dimensions must be present for a packaging solution to be identified. When dimensions aren't available rate estimates are retrieved using weight only and may not be as accurate.

The packaging solution identifies the boxes required to ship the order, and each package's (packed box) weight and dimensions. This information is used to identify each package's *billable weight*. Parcel carriers define the *billable weight* of a package as the **greater** of its *actual* or *dimensional weight*. *Actual weight* is the weight of the package rounded up to the next whole pound. A package's *dimensional weight* is determined by multiplying its length, width and height (round each measurement up to the next whole inch) and dividing it by 139. Round the result up to the next whole number to arrive at the *dimensional weight* in pounds.

**Illustration from the 2018 UPS Rate and Service Guide**

![Dimensional weight calculation illustration](https://hf-files-oregon.s3.amazonaws.com/hdpeniture_kb_attachments/2018/01-13/0921d616-7d36-4737-84a9-9a85a45880ec/dimensional-weight-calc.png)

​

Entering dimensions for your products improves the accuracy of the parcel rate estimates displayed to your shoppers.

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