Business · official-source review · reviewed 2026-10-10
A send looks big on a list count and smaller once the open rate is applied honestly.
Turn the number of contacts and an expected open rate into an estimate of opens and unopened messages.
Small publishers, clubs, and small businesses planning a newsletter send to a known list.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Count the contacts you will send to today. Remove addresses that bounced or unsubscribed.
Use your own past open rate if you have one. Otherwise use a cautious industry average.
Multiply the list count by the open rate. Round to the nearest whole person.
Subtract opens from the list to see unopened messages. Those people need a different message or no message.
Open rate is a rough signal. Track clicks and replies, which show more about the content.
Your list has 2,000 contacts and you expect a 25 percent open rate. That is about 500 opens and 1,500 unopened messages.
Use your own source and details. The example is not a record about a real person or organization.
Mailchimp / Campaign Monitor (benchmark reports) · reviewed 2026-10-10
What this source supports: Average open rates vary widely by industry, but open rate alone is a rough signal; click and conversion rates matter more.
Source limit: Benchmarks are averages; your own list quality and content determine results.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This guide estimates opens from your own rate. It does not predict clicks, sales, or deliverability, and industry benchmarks are only averages.
Benchmarks are averages; your own list quality and content determine results.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Turn the number of contacts and an expected open rate into an estimate of opens and unopened messages.
This App estimates opens from the list size and rate you enter. It does not predict clicks, sales, or deliverability.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Turn the number of contacts and an expected open rate into an estimate of opens and unopened messages.
Free · no account · no upload
Open Email Campaign Expected OpensThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Email Campaign Expected Opens. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.