Tool

Email Open Rate Calculator

Calculate email open rate from unique opens and delivered emails with a simple free tool.

Start tool ← Back to home View cluster

Instant useNo sign up, quick result.

Consistent layoutMatches the main CalcBeacon layout.

Clear next stepJump from result to related tools and guides.

Quick start

Use the fields below, review the result, and then use the related links and guide section if you want to go further.

Enter your numbers

Unique opens

Delivered emails

Formula: open rate = unique opens ÷ delivered emails × 100

Result

Main result

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Opened emails—

Unopened emails—

How to use it

Enter the raw numbers from your report or campaign.
Use the result to compare performance over time.
Cross-check with related metrics before making decisions.

Tool guide

How to use the email open rate calculator

Calculate email open rate from unique opens and delivered emails with a simple free tool. Use this page for a fast estimate, compare a few scenarios, and adjust the inputs until the result matches what you need to decide.

This tool also sits inside the CalcBeacon marketing cluster. That makes it easier to find from category pages, related tools, and supporting guides when you want to compare options.

When it is usefulUse this tool when you want a fast estimate, want to compare options, or want a clearer answer before moving on.

Common mistakesCheck that your numbers use the same units, avoid leaving key fields blank, and test a second scenario so you can see how sensitive the final result is.

Next useful stepAfter using this page, compare the result with a related calculator or open the guide to check the number in context.

Related tools

Use these related tools to compare nearby calculations and move to the next step faster.