Open Rate Calculator

Broadcast campaigns to a full list typically open at 15–30%; a healthy engaged list sits near the top of that range. Automated flows run much higher — welcome emails often exceed 50% because the recipient just asked to hear from you. Below 15% on broadcasts, suspect list fatigue, weak subject lines, or a deliverability problem pushing you to spam folders.

Apple Mail Privacy Protection, enabled for most Apple Mail users since 2021, pre-fetches email images and fires the tracking pixel whether or not the human ever opened the message. That inflates open rates — often by 10–20 points on Apple-heavy lists. Treat opens as a directional trend metric, and lean on clicks and revenue for decisions that matter.

Delivered. Sent minus bounces equals delivered, and an email that never reached an inbox had no chance to be opened — including it punishes engagement for a deliverability issue. Track the two problems separately: bounce rate tells you about list hygiene, open rate about subject lines and sender reputation. This calculator expects the delivered figure from your platform.

In order of impact: send to people who recently engaged (mailbox providers reward this), fix your sending domain authentication (SPF, DKIM, DMARC), test subject lines that create specific curiosity rather than shouting discounts, and keep a consistent from-name subscribers recognize. Sunsetting subscribers who have not opened in six months lifts the rate and protects future delivery.