Email Open Rate Calculator

Calculate email open and click rates

This calculator works out the three core email marketing metrics from your campaign numbers. Open rate is the percentage of delivered emails that were opened, calculated as unique opens divided by emails delivered. Click-through rate is the percentage of delivered emails that generated a click, calculated as clicks divided by delivered. Click-to-open rate measures how compelling your content was once the email was opened, calculated as clicks divided by opens. Together these reveal how well your subject lines and content perform.

Using emails delivered rather than emails sent is the standard basis, since it excludes bounces.

Reading your email metrics

Open rate reflects the strength of your subject line, sender name and send timing, while click-through rate reflects the appeal of your content and call to action. Click-to-open rate isolates content quality from subject-line performance, since it only counts people who actually opened. Comparing these against industry benchmarks and your own history shows what is working.

Note that open-rate tracking relies on an invisible image that privacy features increasingly block, so open rates have become less reliable and click-based metrics more important. All calculation happens locally in your browser.

Related tools

• Incident Impact Calculator — Estimate the cost of a security incident from severity, affected users and downtime hours, with a compliance and trust rating and the response actions each severity level demands.
• Third-Party Risk Assessor — Assess vendor risk based on data access and type.
• Data Breach Cost Estimator — Estimate what a data breach would cost from records exposed, cost per record, days to detect and hours of downtime, split into direct and indirect costs.
• SaaS Risk Heatmap — Pick the SaaS apps your company runs, add your own, and get a heatmap ranking each by data criticality times access scope, with the risk each carries.