If you do not have the "Flexible Shipping WooCommerce" plugin installed yet, please download it here.
Then go to the Plugins tab in your WordPress admin panel -> go to your WordPress admin panel Plugins section and click on "Add new". -> and click on "Upload Plugin":
After the plugin is installed and activated, go to your WooCommerce tab in the admin panel -> Settings:
Make sure, you have the Weight Based Shipping option available:
Now you can add Shipping zones and rules.
Here is an example of how to create Shipping rates for the US zone.
First, add the Shipping zone:
Name the Zone name, and add the United States in the zone region.
Then add Flexible shipping as a Shipping method:
Now, click to edit this method:
Rename the Method to "Weight based shipping" and choose the desired Tax Status:
Scroll down and add Shipping Cost Calculation Rules based on the weight and our Shipping prices:
Click Save Changes and you are done!
Repeat the same steps for the UK and EU zones if you offer EU/UK products in your store.