Tools

Missed calls calculator: what unanswered calls cost your practice

calls
%

that is 10 unanswered calls a day

€
Assumptions: 40% would book, 21 working days
%
days

Monday to Friday, less public holidays.

€2,646

Revenue at stake per month

84 missed bookings a month, €31,752 a year

How it adds up

40 calls × 25% × 40% × €31.50 × 21 days = €2,646

An estimate, not a guarantee of results. Each starting value is a published figure where one exists and our own estimate otherwise, with its source under its field. Replace them with your own figures.

Typical figures by specialty
Specialty Calls per dayMissedWould have bookedVisit value
Ophthalmology 40 calls

ClinicAll estimate, 2026

25%

ClinicAll estimate, 2026

40%

ClinicAll estimate, 2026

€31.50

Assurance Maladie — Consultations en métropole : vos remboursements, 2026

Opticians and hearing care 40 calls

ClinicAll estimate, 2026

25%

ClinicAll estimate, 2026

40%

ClinicAll estimate, 2026

No official figure
Dental and orthodontics 40 calls

ClinicAll estimate, 2026

25%

ClinicAll estimate, 2026

40%

ClinicAll estimate, 2026

€23

Assurance Maladie — Tarifs conventionnels des chirurgiens-dentistes, 2025

General practice 40 calls

ClinicAll estimate, 2026

25%

ClinicAll estimate, 2026

40%

ClinicAll estimate, 2026

€30

Assurance Maladie — Consultations en métropole : vos remboursements, 2024

Typical figures by specialty

Ophthalmology

Calls per day
40 calls

ClinicAll estimate, 2026

Missed
25%

ClinicAll estimate, 2026

Would have booked
40%

ClinicAll estimate, 2026

Opticians and hearing care

Calls per day
40 calls

ClinicAll estimate, 2026

Missed
25%

ClinicAll estimate, 2026

Would have booked
40%

ClinicAll estimate, 2026

Visit value
No official figure

Dental and orthodontics

Calls per day
40 calls

ClinicAll estimate, 2026

Missed
25%

ClinicAll estimate, 2026

Would have booked
40%

ClinicAll estimate, 2026

General practice

Calls per day
40 calls

ClinicAll estimate, 2026

Missed
25%

ClinicAll estimate, 2026

Would have booked
40%

ClinicAll estimate, 2026

A missed calls calculator puts a figure on something every front desk knows but rarely measures: the patient whose call rings out. That patient may try again later, or may book with another practice. This tool turns those lost calls into missed appointments and revenue, based on figures from your own practice.

Each specialty opens with starting values, and each one carries its source. The value of a visit comes from the official French tariff published by the Assurance Maladie where one exists. Call volume and the shares of missed and would-have-booked calls are provisional ClinicAll estimates, explained on our methodology page: they show how the calculation works, not what happens at your practice.

The result is an estimate, not a promised outcome. It becomes meaningful once it rests on your own records: your phone system’s call log, a week of tallies at the desk, the average value of a first visit. The table below the calculator compares the starting values across specialties, and the rest of this page walks through the calculation, its limits and how to measure your own figures.

How this tool works

The calculation starts with calls received per day and the share that goes unanswered. It then applies the share that would have booked, the average visit value and the working days in the month. The product is the revenue at stake each month, which heads the result. Beneath it come the bookings missed each month and the yearly equivalent of the revenue, then the calculation written out with your own figures, so you can check it by hand. Without a visit value, the result shows the bookings missed each month instead.

Working days run from Monday to Friday, less public holidays. A practice that opens on Saturdays, or closes one afternoon a week, sits a little off that basis, so read the monthly figure with that in mind. The other tools for your practice help you place those closing days and hours.

For general practice, ophthalmology and dentistry, the value of a visit follows the French Assurance Maladie tariff. Opticians have no official tariff, so the calculator suggests nothing and waits for your own average sale or the price of an eye test. A practice in Luxembourg or Germany works with different fees, and the result only makes sense with its own.

Three values stay provisional until a solid public source exists: calls per day, the missed share and the share that would have booked. Each is labelled as a ClinicAll estimate under its field, and we will replace them when a public source or our own measurements allow. The Hubert Vision case study shows the kind of production data we hold today.

To find your own figures, start with the call log from your phone system or your operator, which usually separates answered calls from lost ones. Failing that, a tally sheet kept at the desk for a week is enough, as long as it includes calls that arrive over lunch. Then ask the team to mark which calls were about an appointment.

Treat the result as an order of magnitude. A patient who calls back and books later is not lost, which lowers the share that would have booked. An answered call left on hold too long can be lost without appearing among your missed calls. The two effects pull in opposite directions, which is why measuring beats assuming.

The values you settle on are written into the page address. A copied link or printed page therefore shows the same calculation to a partner or your accountant. The arithmetic runs in your browser; all we receive is a signal that the tool was used, with no values attached.

ClinicAll answers the calls your desk cannot take. See the integrations page for the booking options available to your practice. How it works covers each step, and the pricing page explains how the price is set in a written quote. The team on our about page sets the receptionist up and answers your questions in French, from Luxembourg.

Questions about this tool

How reliable is the missed calls calculator?

It is as reliable as the figures it works from. The starting values are official tariffs or provisional estimates, each with its source; your own records give a result that describes your practice. The result remains an estimate, not a promise.

How do I find out how many calls my practice misses?

Your phone system or operator usually lists them in its call log. Failing that, a tally sheet kept at the desk for a week gives a fair idea. Count the calls that come in over lunch as well.

Why is there no visit value for opticians?

No official tariff sets the value of a visit to an optician. The calculator therefore waits for your own figure: your average sale or the price of an eye test.

Are my figures sent to ClinicAll?

No. The calculation runs in your browser, and all we receive is a signal that the tool was used, with no values. Your figures stay in the page address, visible only to the people you share it with.