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Sales Funnel Email Open Rate Calculator

Calculate your email open rate and estimate how many opens you can expect across a sales funnel based on sends and delivery performance.

Your Details

Overview

The Sales Funnel Email Open Rate Calculator helps you measure how well your emails are performing by comparing unique opens with delivered emails. Enter the number of emails sent, delivery rate, unique opens, a benchmark rate, and the number of funnel stages to estimate engagement across your funnel.

How it works

This calculator first estimates how many emails were delivered by multiplying emails sent by the delivery rate. It then calculates open rate by dividing unique opens by delivered emails and converting the result into a percentage. It also compares your result with a benchmark and projects total opens across multiple similar funnel stages by multiplying opens by the number of stages.

How to use this calculator

  1. 1Enter the total number of emails sent.
  2. 2Add your estimated or actual delivery rate.
  3. 3Enter the number of unique opens recorded.
  4. 4Set a benchmark open rate for comparison.
  5. 5Enter the number of funnel stages to project total opens.
  6. 6Review your open rate, benchmark gap, and projected funnel opens.

Example Calculation

Emails sent

10000

Delivery rate

98%

Unique opens

2200

Benchmark open rate

25%

Number of funnel stages

5

Email open rate

22.45%

If you send 10,000 emails with a 98% delivery rate and record 2,200 unique opens, your open rate is about 22.45%. That is around 2.55 percentage points below a 25% benchmark, and similar performance across 5 stages would project about 11,000 total opens.

Frequently asked questions

What does this calculator estimate?

It estimates your email open rate based on delivered emails and unique opens, and it can project total opens across multiple funnel stages.

Why does the calculator use delivered emails instead of sent emails?

Open rate is commonly measured against delivered emails because emails that bounce or fail to deliver cannot be opened.

What is a unique open?

A unique open counts one recipient once, even if that person opens the same email multiple times.

Can I use this calculator for a whole sales funnel?

Yes. The funnel projection estimates total opens across multiple similar stages, which can be useful for planning or benchmarking.

Why might my actual open rate differ from this estimate?

Actual results may differ due to tracking limits, mailbox privacy features, list quality, subject lines, send timing, and audience behavior.

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Assumptions and warnings

Assumptions

  • Open rate is calculated using unique opens divided by delivered emails.
  • Delivery rate is assumed to be consistent for the campaign being measured.
  • Projected funnel opens assume each stage performs similarly to the current stage.
  • Results do not account for privacy-related tracking limitations or bot activity.