📞 Missed Call Calculator — Knowledge Base

How much revenue are your
missed calls costing you?

The formula, the benchmark booking rates, and the fastest fixes — everything you need to know about calculating and recovering missed call revenue.

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How It Works

What the calculator does

The missed call calculator turns a vague problem into a specific dollar figure — here's how it works and what inputs you need.

What does the missed call revenue calculator do?
The calculator estimates how much annual revenue your business is losing due to unanswered phone calls. You enter how many calls you miss per week, your average booking or job value, and your estimated booking rate, and the tool multiplies those figures across 52 weeks to show you an annual lost revenue number. It turns a vague problem — "we miss some calls" — into a specific dollar figure that makes the cost of inaction concrete.
How do I know how many calls I miss per week?
The easiest sources are your phone's missed call log, your Google Business Profile call history (available in the GBP dashboard), or your VOIP system's call analytics. If you don't have visibility into this yet, start conservative: even 3 missed calls per week at modest job values adds up to thousands of dollars annually. Many business owners are surprised by how high the number is when they actually count.
Is the revenue estimate accurate?
It is an honest estimate based on your inputs, not a guaranteed figure. The calculator is designed to be clear about what it is doing: applying a conversion rate assumption to a call volume. If your actual booking rate is lower than the default, your real loss will be lower too. The goal is to give you a directionally accurate, thought-provoking number — not to exaggerate the problem.
Is the missed call calculator free?
Yes, completely free with no account required. You enter your numbers, see your annual lost revenue estimate instantly, and there is no paywall. The three specific recommended fixes are revealed after entering your email address on the results page — the calculation itself is always free and immediate.
The Formula

The math behind the number

The calculator uses a straightforward annualization formula — understanding it helps you trust the result and adjust inputs with confidence.

What is the formula the calculator uses?
The formula is: missed calls per week × 4.33 (average weeks per month) × booking rate as a decimal × average job or order value × 12 months = estimated annual lost revenue. For example, 5 missed calls per week × 4.33 × 0.35 booking rate × $200 average job value × 12 = $18,228 lost per year. The calculator does this math instantly so you can adjust any variable and see the impact immediately.
Why does the formula use 4.33 weeks per month?
There are exactly 52 weeks in a year and 12 months, so the average number of weeks per month is 52 ÷ 12 = 4.333. Using 4 weeks per month would undercount by about 8%, so 4.33 is the mathematically accurate multiplier. The calculator uses this to annualize your weekly missed call estimate correctly without any rounding error compounding over 12 months.
What is a "booking rate" exactly?
The booking rate (also called conversion rate) is the percentage of inbound callers who would have become paying customers if you had answered the phone. It is not the percentage who leave a voicemail or call back — it is the percentage of the original missed call pool who would have converted had a human (or AI) answered. This is why the number feels high to some business owners: many callers hang up when they hit voicemail and immediately call the next competitor.
Booking Rate

What booking rate should you use?

The booking rate is the most important variable in the formula. Here's how to choose the right number for your business.

What booking rate should I enter?
The default booking rate is 35%, which reflects research showing that 30–40% of callers who reach a live answer become paying customers. If your industry has high urgency — emergency plumbing, emergency HVAC repair, urgent dental — you can raise this to 50–60% because those callers have immediate need and will book whoever answers first. For lower-urgency categories like non-emergency landscaping or routine cleaning, 20–30% is more realistic.
What business types is this calculator designed for?
The calculator is designed for local service businesses that rely primarily on phone calls to book jobs or appointments: plumbers, HVAC technicians, electricians, roofers, auto mechanics, salons, cleaning services, landscapers, gyms, restaurants, and similar trades. It works for any business where a missed inbound call represents a missed sale, not just a delayed one.
Can I use this calculator for a restaurant?
Yes. Select "Other local service" as the business type and enter your average order or reservation value as the job value. For a restaurant where the average party spends $80 at dinner, that is your number. Restaurants that take reservations by phone have particularly high exposure to missed call losses because a missed reservation call often means the party books at a competitor that same evening.
What if I currently get very few missed calls?
If you rarely miss calls, the calculator will show you what each individual missed call is worth in dollar terms — which is still valuable information. It also prompts you to consider whether your current call volume reflects your real market opportunity, or whether missed calls are suppressing demand you don't even know about. Some businesses discover that their low inbound volume is partly because word has spread that they're hard to reach.
Use Cases

Who should use this tool

Any local service business that relies on inbound phone calls has a missed call revenue problem — the question is how big.

What business types benefit most from this calculator?
Trades and home services benefit the most because they receive high-urgency calls where callers need help immediately. A plumber who misses an emergency call loses not just the job but the entire customer relationship — the caller books someone else and refers that person going forward. Similar dynamics apply to HVAC companies, electricians, roofers, and auto shops. Salons and medspas also see significant losses because appointment calls are time-sensitive.
Can a solo operator or freelancer use this?
Yes. Solo operators often have the highest missed call rate because they are frequently on a job and cannot answer the phone. The calculator is especially eye-opening for solopreneurs because it quantifies exactly what each unanswered call costs over the course of a year — often enough to justify hiring a part-time answering service or implementing an AI receptionist.
Fixes

How to recover missed call revenue

Three proven approaches to reduce missed calls and recover the leads you're currently losing.

What is the fastest fix for recovering missed call revenue?
Missed-call text-back is the fastest and most affordable fix. When a call goes unanswered, an automated SMS is sent to the caller within seconds saying something like "Sorry we missed you — how can we help?" Research and practitioner data consistently show this recovers 20–30% of missed leads who would otherwise have called the next business on the list. It works because it responds immediately while the caller is still actively searching.
What is an AI receptionist?
An AI receptionist is a virtual assistant that answers every inbound call on behalf of your business, conducts a natural conversation, captures the caller's name and contact information, and can book appointments or take messages — all without human intervention. Unlike a voicemail, it responds in real time and keeps callers engaged. It is particularly valuable for after-hours calls and high-volume businesses that cannot staff a full-time receptionist.
How much does a missed-call text-back service cost?
Many CRM and business communication platforms include missed-call text-back as part of a broader package, typically $50–$150 per month. Some basic implementations are free through Google Business Messaging or Yelp's messaging feature. Standalone text-back tools for small businesses often start around $25–$50 per month. Given that a single recovered job typically pays for several months of the service, the ROI is usually immediate.
How do I reduce missed calls long-term?
Three proven fixes, in order of ease: (1) Missed-call text-back — recover leads automatically within seconds of a missed call. (2) AI receptionist — answer every call 24/7 without additional staff. (3) The 5-minute callback habit — train your team to return every missed call within 5 minutes; callers reached within 5 minutes are 10x more likely to convert than those called back after 30 minutes. The full 3-fix guide is revealed after entering your email in the calculator results page.
Privacy

Your data stays in your browser

The calculator is completely private — no business data is collected or transmitted.

Does the calculator store my business data?
No. All calculation happens entirely in your browser using JavaScript. No data you enter — your call volume, booking rate, or job value — is transmitted to Forgely's servers or stored anywhere. The result exists only on your screen during your session.
Why do I have to enter my email to see the fixes?
Forgely emails you the full 3-fix guide as a follow-up resource so you have it in writing. The email gate is the only ask — there is no paid product behind it, no credit card required, and no upsell for the calculator itself. The email also allows Forgely to send you any updates to the guide as new tools become available.

Find out exactly what your missed calls cost

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