Gratuito online email open rate calculator. Calculate open rate, opens needed, or emails delivered for your email marketing campaigns. Confronto against industry benchmarks. Puro client-side, no ads.
Email Open Rate is one of the most important metrics in email marketing. It measures the percentage of delivered emails that were opened by recipients. A healthy open rate indicates strong subject lines, good sender reputation, and relevant content. This calculator helps you quickly compute open rate, required opens, or required delivery volume — whichever two values you know. All calculations happen entirely in your browser — no data is ever sent a a server.
Email Open Rate is the percentage of delivered emails that were opened by recipients. The formula is: Open Rate = (Opens / Emails Delivered) × 100. For example, if you sent 5,000 emails and 1,250 were opened, your open rate is 25%. Note: open rate is calculated against emails delivered, not total sent (bounces are excluded).
A good open rate varies by industry. Average across all industries is 21–25%. Retail/e-commerce typically sees 15–20%, SaaS/tech 20–25%, finance/banking 25–30%, healthcare 23–28%, and non-profits often achieve 25–35%. Your own historical performance is the best benchmark.
To improve open rates: write compelling subject lines (keep under 50 characters), personalize with recipient names, segment your audience for relevance, optimize send times, maintain a clean email list, use a recognizable sender name, avoid spam trigger words, and A/B test subject lines regularly.
Open rate measures how many recipients opened your email. Click-through rate (CTR) measures how many of those openers clicked a link inside the email. Open rate reflects subject line and sender reputation effectiveness, while CTR reflects content and call-a-action quality.