Click-To-Open Rate Calculator.

Click-through rate divides unique clicks by delivered emails, and click-to-open rate divides them by unique opens. CTR answers what share of everyone you reached clicked, CTOR what share of openers clicked. The same campaign can show a 1.50% CTR and a 12.00% CTOR, so enter sent and bounced emails here to see both side by side.

Unique on both sides. Total clicks count one person clicking three links as three clicks, and total opens count every re-open, so a ratio of totals mixes how many people acted with how often they repeated it. Count one click and one open per email, which is how sending tools report their unique figures.

Some people clicked without an open being recorded. That happens when a mail app blocks images: the tracking image never loads, but the link still records the click. Some sending tools count every click as an open to correct for it. The calculator does not print a rate over 100% and asks for an open count that includes everyone who clicked.

It pushes click-to-open rate down. Apple Mail loads images for emails nobody read, which adds opens to the base, while a click still needs someone to act. A falling CTOR on a list with many Apple Mail users can therefore reflect more machine-loaded opens rather than a weaker email.

They can. Some company mail gateways open links in an email before it reaches the inbox, to check them for threats. Good tracking ignores scanners that identify themselves and counts only the first click on each email, which SendCanyon does. A burst of clicks on every link seconds after delivery is worth checking before you act on it.

Only when the email carries a link you want clicked. Many cold emails have no link, or just one, because the aim is a reply. If your call to action is to reply, reply rate is the number to watch, and click-to-open rate will mostly reflect scanners and links in your signature.

More than a handful. With 40 opens, each click moves the rate by 2.5 percentage points, so a few clicks either way change the picture. Compare campaigns once each has enough opens that one click is a small step, and keep the audience similar between them.