Flat rates: a specific amount that you will charge your customers for shipping, depending on the shipping service used.

Calculated rates: a varying amount that is calculated by the shipping carrier at checkout. Your customers will be charged the exact amount that the shipping will cost, plus any handling fees you add to the price (these handling fees can also be a flat cost or by percentage).

From your Shopify store, go to Settings.

Select "Shipping and delivery"

Under Shipping, click on "Manage rates"

Scroll down to the shipping zone you want to set shipping rates for, and click "Add rate"

Click on "Set up your own rates" to create a flat rate for the shipping service you have selected under "Shipping speed".

Type in your desired shipping rate and click "Done", you will be prompted to save your changes. Click on "Save" at the top of your screen to keep your new shipping rates.

From your Shopify store, go to Settings.

Select "Shipping and delivery"

Under Shipping, click on "Manage rates"

Scroll down to the shipping zone you want to set shipping rates for, and click "Add rate"

To create calculated rates, click on "Use carrier or app to calculate rates", in this section, you will also be able to add handling fees.

Select the shipping carrier and services you'd like to offer and click "Done", you will be prompted to save your changes. Click on "Save" at the top of your screen to keep your new shipping rates.

From your Shopify store, go to Settings.

Select "Shipping and delivery"

Under Shipping, click on "Manage rates"

Scroll down and click on "Create shipping zone"

Search or select the country or region you want to add to your shipping zone and click on it

Click on "Done" after you have selected the countries or regions you want to add to your shipping zone

You will be prompted to save your changes. Click on "Save" at the top of your screen to keep your new shipping zone