To begin, you need to have two pieces of data: The total number of emails you sent (Total Emails Sent) and the total number of conversions you received from those emails (Total Conversions). You can also use the number of unique clicks as an alternative to total conversions. Consult your email service provider if you aren’t sure how many conversions you got from your campaign.
Next, divide Total Conversions by the Total Emails Sent to get your conversion rate. Then, multiply the result by 100 — this gives us the percentage value for our email conversion rate.
For example, if we sent 1,000 emails and received 100 conversions from them, our formula would be: (100 ÷ 1000) * 100 = 10%