Total Addressable Market Calculator

Know exactly how big your total addressable market is

Size your market using 100M+ verified companies, then turn your total addressable market (TAM) into a prospect list you can contact today.

Free · No signup · Real company data, not market reports

Trusted by more than 7,000,000 professionals to find and reach their customers

Define your market criteria

Set filters for industry, company size, geography, and tech stack to match your ideal customer profile.

Enter your contract value

Add your average contract value (ACV) so the calculator can convert company count into revenue potential.

Review your market size

See your total addressable market broken down by matching companies and estimated revenue opportunity.

Export your prospect list

Turn your TAM into a list of real companies you can contact. Find decision-makers and start outreach.

Calculate your TAM

Know your market size before you spend a dollar

Stop guessing. Get a number backed by 100M+ real companies, not analyst projections.

Turn your TAM into pipeline

Export matching companies and find decision-maker email addresses. Go from market size to booked meetings in minutes.

Stop pitching companies that no longer fit

Your market size reflects who's out there today, not who was there last year. No stale leads, no wasted outreach.

Find your highest-value segment first

Run the calculator with different filters to identify the segment with the strongest revenue potential.

Back your pitch with data

Give investors a bottom-up TAM backed by real company counts. Stronger than top-down industry-report estimates.

Skip the manual research

Enter your ICP filters and get a market size number in seconds. Beats the spreadsheet approach by hours.

Calculate your TAM

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Hunter is a great tool for saving time and building pipelines and prospecting. Before we had Hunter in place I was spending a long time guessing email addresses and using up valuable time every day. The Email Verifier is also a game changer for our team.

Sean Gallagher Commercial Account Executive at Lattice

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Discover

Find the right people to send those emails to. Build targeted lead lists by company size, industry, and role.

Find target companies

Email Finder

Find any professional's email address by name and company domain.

Find leads

Email Verifier

Check if an email address is valid before sending to protect your sender reputation.

Verify email addresses

All free tools

Browse Hunter's complete library of free lead generation and outreach tools.

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Find your ideal prospects

Search Hunter's B2B database to find companies and contacts matching your TAM criteria. Filter by industry, size, tech stack, and more.

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Send targeted email sequences

Connect your email account and send personalized outreach sequences at scale. Automated follow-ups, scheduling, and performance tracking built in.

Sequences

Connect to your CRM

Sync Hunter data with your CRM, Zapier, or custom workflows through native integrations and APIs.

Integrations

How to Calculate TAM, SAM, and SOM

Step-by-step guide to sizing your market with real examples.

Read the guide

Email Outreach Guide

From first email to booked call. The full playbook for email outreach.

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Frequently asked questions

Everything you need to know about calculating TAM with real company data

Total addressable market (TAM) is the total revenue opportunity for a product or service. It represents the maximum amount of revenue a business can generate by selling its product or service in a specific market, assuming 100% market share. TAM helps founders, sales leaders, and investors understand the full opportunity before narrowing down to prospects that match your ideal customer profile.

TAM is calculated by multiplying the total number of potential customers by your average contract value (ACV). The calculator uses Hunter's database of 100M+ real companies to identify companies matching your criteria, then multiplies that count by your ACV to estimate your total addressable market.

TAM is the full pie. SAM (serviceable addressable market) is the slice you can actually serve today. SOM (serviceable obtainable market) is what you'll realistically close this year. Most pitch decks overweight TAM and underweight SOM, which is the number investors actually care about. Our guide on how to calculate TAM, SAM, and SOM walks through the full process.

Yes, the TAM calculator is completely free. No credit card or signup required. If you want to save your calculations or export company lists, you can create a free Hunter account.

The data comes from publicly available sources including company websites, LinkedIn, funding databases, and more. Hunter has a database of over 100 million companies worldwide that is continuously updated and verified. You can search any company domain to see the contacts on file.

Yes. Create a free Hunter account to save your TAM calculations and export lists of companies matching your criteria. From there you can find decision-maker email addresses and start outreach.

Start with your ideal customer profile: industry, company size, geography, and technology stack. Enter these filters into the TAM calculator along with your average contract value. The calculator returns the total number of matching companies and your estimated market size, giving you a data-backed TAM for your pitch deck. When you're ready to reach out, browse our outreach email templates to get started.

Average contract value is the average annual revenue per customer. You calculate it by dividing your total annual contract revenue by the number of customers. ACV is a key input for TAM calculations because it converts your addressable company count into a revenue figure.

The company count is based on verified data, so it's more reliable than top-down estimates from industry reports. Where accuracy varies is your ACV assumption. If you're pre-revenue, estimate conservatively and re-run the calculator as your pricing firms up. Then write outreach emails tailored to each segment and refine as you go.

Start with TAM by entering your broadest market criteria into the calculator. For SAM, narrow to the segments you can serve with your current product and channels. For SOM, apply your realistic market share based on competition and capacity. Most startups capture 1–5% of their SAM in the first few years.

The standard TAM formula is: TAM = Total number of potential customers × Average contract value (ACV). There are two approaches: top-down (narrowing from industry reports) and bottom-up (counting real companies matching your ICP). Hunter uses the bottom-up approach with real company data for more accurate results. Once you have your list, verify their email addresses before starting outreach.

Yes. Run the calculator multiple times with different filters to size individual market segments. Compare segments by company count and revenue potential to prioritize where to focus your outreach sequences.

Total Addressable Market Calculator

Know exactly how big your total addressable market is

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