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FedEx Carrier Calculated shipping

Carrier Calculated shipping rates via FedEx automatically calculates shipping costs based on FedEx rates and containers. It uses package weight, dimensions, and shipping address to calculate shipping costs at checkout.

Note: For an overview of the shipping process and our other shipping methods, visit Setting up shipping rates. This guide is specific to FedEx. For a general overview of Carrier Calculated shipping, visit Carrier Calculated shipping overview.

Before you begin

  • To use Carrier Calculated shipping via FedEx, you'll need to accurately label weight and dimensions for all products.
  • Carrier Calculated shipping via FedEx is only available for domestic shipping within the United States.
  • If FedEx Carrier Calculated shipping is enabled, the item limit in shopping carts reduces to 150 items. (The default limit is 500 items.) This limit is in place to keep shipping estimates accurate, since larger orders interfere with FedEx' shipping algorithm.
  • Carrier Calculated shipping is available on the Advanced plan, and certain legacy billing plans.
  • This guide covers setting up shipping with FedEx. Visit our guides on UPS and USPS for more carrier-specific information.

Step 1 - Add Carrier Calculated rates via FedEx

In the Home Menu, click Commerce, and then click Shipping.


Click Add Shipping Option.

 Select Carrier Calculated via FedEx from the shipping options.

Step 2 - Select services

In the Formula tab, enable the services you'll support. You can use these FedEx services:

  • FedEx Ground Home Delivery
  • FedEx Priority Overnight
  • FedEx Standard Overnight
  • FedEx 2Day
  • FedEx Express Saver
  • FedEx First Overnight

Visit FedEx's documentation for detailed delivery information for each service. 

Step 3 - Set a formula

FedEx rates are calculated using a percentage markup and your shipping ZIP Code.


In the Markup box, enter a percentage or amount markup to charge more than the estimated cost for FedEx charges. This is a useful way to cover the price of packaging, time spent shipping, or other additional costs.

Ship from ZIP Code

Enter the ZIP Code for your shipping origin. If you ship products from your home or store location, this should be your ZIP Code.

Step 4 - Add containers

Click the Containers tab to list your available shipping containers (boxes or packages) for the service type.

Squarespace estimates shipping costs based on the minimum number of packages and smallest containers possible.

Note: Since customers may purchase multiple items, it's important to set containers larger than your product dimensions. If your containers are set to accommodate one item each, this packages large orders in multiple containers and significantly increases shipping costs.

Use FedEx containers

Note: FedEx Ground Home Delivery requires custom containers. If you're using this service, you'll be prompted to enter a custom container before saving.

All other options support the following standard FedEx containers:

  • FedEx® Small Pak 10.25" ✕ 12.75" ✕ 0.25"
  • FedEx® Large Pak 12.00" ✕ 15.50" ✕ 0.25"
  • FedEx® Small Box 10.88" ✕ 1.50" ✕ 2.38"
  • FedEx® Small Box 8.75" ✕ 2.69" ✕ 11.31"
  • FedEx® Medium Box 11.50" ✕ 2.38" ✕ 13.25"
  • FedEx® Medium Box 8.75" ✕ 4.38" ✕ 11.31"
  • FedEx® Large Box 12.38" ✕ 3.00" ✕ 17.50"
  • FedEx® Large Box 8.75" ✕ 7.75" ✕ 11.31"
  • FedEx® Extra Large Box 11.88" ✕ 10.81" ✕ 11.06"
  • FedEx Extra Large Box 15.75" ✕ 14.19" ✕ 6.00"
  • FedEx® Tube 6.00" ✕ 6.00" ✕ 38.00"

Use custom containers

In the Custom Containers tab, click Add a custom container. Enter a Container name and its Dimensions. Click the + icon to add more containers.

Note: You'll see an error if your container is larger than your carrier's package size limit. To resolve this, see Shipping oversized items.

Step 5 - View FedEx shipping information

To learn more about how your items are packed and the rates you're charging, view an order's shipping information.

Step 6 - Check your rates (optional)

FedEx calculates rates based on the dimensions and weight of the package and the distance shipped. To test how rates for different product combinations are calculated, run test orders.

Running a test order will show you how items are being placed in their containers. If the rates seem high, you can check them against the FedEx calculator. You can often reduce rates by creating a custom container or reducing the dimensions of a product so it fits the container better.

Tip: If you run a test order and have questions about how the FedEx shipping price was calculated, open a ticket with the following information:
  • Exact products in the cart
  • Shipping options selected
  • Exact address used
  • Order # for any relevant test orders
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FedEx Carrier Calculated shipping