Hi, I didn’t solve it with Shopify but managed to solve it myself.
Step 1: Remove all your existing shipping rates Step 2: Go to the units and switch this back and forth to the right metric i.e. change it to lb then change it to kg Step 3: Go back to the shipping rate section and create new shipping rates and it should appear in kg
Ok this is what worked for me. 1) In the settings we had Metric and KGs selected. 2) Changed the settings to Grams and Saved Note, no change in the Shipping weights after saving 3) Changed back to KGs and Saved
Whilst this retained the old rates in pounds, I could add new rates in KGs