Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Digital Tech & SEO Marketing
Email Deliverability Calculator — Open Rate & Effective Reach
Delivered = sent × (1 − bounce%); opens = delivered × open rate.
Estimate effective email reach accounting for bounces and opens. Planning estimates only — verify with production tools and vendor pricing where applicable.
Inputs
10010000000
020
180
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Opens = 10,780. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
Scenario studio
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Scenario A
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Scenario B
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Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Emails sent
The “Emails sent” value used in this tool’s formula. Adjust it to see results update live.
Bounce rate (%)
The “Bounce rate (%)” value used in this tool’s formula. Adjust it to see results update live.
Open rate (%)
The “Open rate (%)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Estimate effective email reach accounting for bounces and opens. Planning estimates only — verify with production tools and vendor pricing where applicable. Delivered = sent × (1 − bounce%); opens = delivered × open rate. Example: 50K sent, 2% bounce, 22% open → 49K delivered, ~10.8K opens.
Delivered = sent × (1 − bounce%); opens = delivered × open rate.
Example: 50K sent, 2% bounce, 22% open → 49K delivered, ~10.8K opens.
When to use this Email Open Rate & Deliverability
Common use cases
- Estimate effective email reach accounting for bounces and opens.
- Sanity-check with this case: 50K sent, 2% bounce, 22% open → 49K delivered, ~10.8K opens.
- The relationship is: Delivered = sent × (1 − bounce%); opens = delivered × open rate.
Localized examples
- Digital Tech & SEO Marketing: the example on this page uses the same formula as the widget.
What you get
- Fields: Emails sent, Bounce rate (%), Open rate (%)
- Delivered = sent × (1 − bounce%); opens = delivered × open rate.
- Example on the page: 50K sent, 2% bounce, 22% open → 49K delivered, ~10.8K opens.
How to Calculate Email Open Rate & Deliverability Step-by-Step
- 1Enter Emails sent, Bounce rate (%), Open rate (%). Use the values you have, not a catalog average, unless that is all you know.
- 2Delivered = sent × (1 − bounce%); opens = delivered × open rate.
- 3Worked case: 50K sent, 2% bounce, 22% open → 49K delivered, ~10.8K opens.
- 4Compare the result to last month’s invoice or a vendor calculator before you commit capacity.
Governing formula
Delivered = sent × (1 − bounce%); opens = delivered × open rate.
50K sent, 2% bounce, 22% open → 49K delivered, ~10.8K opens.
Example: set Emails sent = 50,000, Bounce rate (%) = 2, Open rate (%) = 22, then read the result.
Variable definitions
- emailsSent
Emails sent
The “Emails sent” field. Default 50000; typical range 100–10000000.
- bouncePct
Bounce rate (%)
The “Bounce rate (%)” field. Default 2; typical range 0–20.
- openRatePct
Open rate (%)
The “Open rate (%)” field. Default 22; typical range 1–80.
- Closed-form math (Delivered = sent × (1 − bounce%); opens = delivered × open rate.) misses idle time, egress, packet loss, and reserved capacity on the real bill.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Delivered = sent × (1 − bounce%); opens = delivered × open rate.
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Community
Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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