About the Email Open Rate Calculator

Open rate measures how many delivered emails got opened — the standard health check for subject lines and list quality. With 10,000 delivered and 2,200 opens, the rate is 22%, leaving 7,800 unopened; 250 clicks then give a 2.5% click rate overall and an 11.4% CTR on opens.

Reading the Funnel

The gap between opens and clicks is the content's job: a strong subject line earns the open; the body earns the click. When CTR on opens falls below ~5%, the message and offer aren't matching the promise of the subject line — test one element at a time.