Use below calculator to calculate your website/shop conversion rate.
This tool is part of Marketing Tools
For using MARA conversion rate calculator you will need the following:
Let's assume you want to calculate conversion rate for August.
If you use Google Analytics (or other tracking solution), select the period to be from 1st to 31th August. Then get the number of users and insert it into the left input. Now go to your system that tracks conversions (can be your online shop CRM) and get total number of transactions. Insert the number in second input fields.