Your phone system already knows what you are missing.
Export your call log, drop the file in, and see the real pattern: how many inbound calls go unanswered, the hours it happens, and how many people never got through at all. The file never leaves your browser.
Most phone systems export a call log: RingCentral, 8x8, Dialpad, GoTo, CallRail, Twilio, Google Voice and most VoIP panels all have a CSV export, usually under reports or call history.
Why this beats guessing.
The missed-call calculator asks you to estimate. This reads what actually happened.
Most owners underestimate their miss rate, and not by a little. A missed call leaves no invoice, no ticket and no angry email: the only trace is a line in a log nobody opens. That is why the number is worth pulling rather than guessing.
Two details make this read honest. It counts distinct callers rather than calls, because somebody ringing three times is one lost customer, not three. And it separates calls that came in outside your opening hours, because that is the portion an agent covers without changing anything about how your team works during the day.
What it cannot tell you: whether the caller was a customer, a supplier or a sales call. If a good share of your inbound is noise, set the conversion rate low and treat the revenue line as an upper bound.
Questions we get a lot.
Straight answers, no sales layer. Anything else, ask us directly.
All answers →Does my call log get uploaded anywhere?
No. The file is read in your browser with the standard file reader and the numbers are worked out on your own machine. Nothing is sent to us or to anyone else, there is no account, and closing the tab discards it. You can confirm this by opening your browser devtools network tab while you use it: no request is made.
Where do I get a CSV of my calls?
Most phone systems export one. RingCentral, 8x8, Dialpad, GoTo, Vonage, CallRail, Twilio, Aircall and Google Voice all have a call history or reports screen with a CSV or export button. Ask for the longest range you can get: two weeks is enough to see a pattern, a quarter is better.
How does it decide a call was missed?
It reads the status column first, treating values like missed, no answer, busy, failed, abandoned and voicemail as unanswered. If there is no status column it falls back to duration: a zero-second inbound call was not answered. Outbound calls are excluded when a direction column exists, so the percentage is of calls coming in.
My columns were detected wrongly. Can I fix that?
Yes, and you should. Every provider names columns differently, so the mapping is shown as a set of dropdowns you can correct. Change one and every figure recalculates immediately.
How is the revenue figure worked out?
It counts the distinct callers who never got through, multiplies by the share of enquiries you say becomes a customer, and multiplies that by what a customer is worth. The annual figure scales that by the number of days in your export. It is deliberately based on unique people rather than call count, because one person ringing three times is one lost customer, not three.
What if the numbers look fine?
Then they are fine, and the tool says so. A low miss rate means the case for an AI receptionist is after-hours cover or booking rather than rescuing lost revenue, which is a smaller and more honest claim.
Want us to read the log with you?
Send the same export and we will come back with what we would automate first, what it would cost, and whether it is worth it at your volume.