Email Open Rate Table: Open rate by Unique opens
Reference table of open rate for Email Open Rate across a range of unique opens values — exact, engine-computed figures you can read off at a glance.
Email Open Rate Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Open rate
25.00%
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Email Open Rate Calculator
The Email Open Rate Calculator works out your open rate in an instant. Enter unique opens and emails delivered and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the unique opens.
- Enter the emails delivered.
- Read off your open rate — the calculator updates automatically, with no button to press.
Formula
The Email Open Rate Calculator uses the formula:
Open rate = Unique opens ÷ Emails delivered × 100
Worked example
For example, with unique opens of 250 and emails delivered of 1,000, the open rate is 25.00%.
| Unique opens | 250 |
|---|---|
| Emails delivered | 1,000 |
| Open rate | 25.00% |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Divide unique opens by emails delivered and multiply by 100. 250 opens from 1,000 delivered is a 25% open rate.
Use delivered emails, since bounces never reached an inbox and would distort the rate.
It varies by industry, but many campaigns aim for 15–30%. A strong subject line and sender name help.
Image blocking and privacy features can under- or over-count opens, so treat the figure as a guide.
Enter the unique opens. Enter the emails delivered. Read off your open rate — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Email Open Rate: Formula, Steps & Examples
Learn how to calculate Email Open Rate — the formula explained step by step, with worked examples and a free calculator to check your answer.