TAM / SAM / SOM
Calculate your Total Addressable Market (TAM), Serviceable Available Market (SAM), and Serviceable Obtainable Market (SOM) to validate your business opportunity.
Calculator
Total Addressable Market
Calculates the total possible demand for your product or service, assuming 100% market share.
Tool Guide
The TAM SAM SOM framework helps you quantify your market opportunity. Investors require this to validate the scale of your business.
Total revenue if you had 100% market share of every possible customer.
The segment of TAM you can actually reach with your business model.
Your specific target for the next 3-5 years.
Understanding TAM / SAM / SOM
Understanding Market Sizing
Market sizing is the process of estimating the potential of a market. It's crucial for understanding the viability of a business idea, securing investment, and setting realistic growth targets. The most common framework for this is TAM, SAM, SOM.
1. TAM (Total Addressable Market)
"How big is the universe?"
TAM represents the total market demand for a product or service. It's the maximum amount of revenue a business could generate if it had 100% market share and faced no competition.
- Example: The global market for project management software.
- Why it matters: It shows the long-term potential and scalability of the opportunity.
2. SAM (Serviceable Available Market)
"How much of the universe can my reach?"
SAM is the segment of the TAM targeted by your products and services which is within your geographical reach.
- Example: Project management software for small creative agencies in North America (English speaking).
- Why it matters: It sets the realistic ceiling for your medium-term growth.
3. SOM (Serviceable Obtainable Market)
"How much can I capture?"
SOM is the portion of the SAM that you can capture. It considers your current resources, competition, and go-to-market strategy. This is your short-term target (1-3 years).
- Example: Capturing 5% of the creative agency market in North America within 2 years.
- Why it matters: It's your most important metric for short-term financial planning and sales targets.
Calculation Approaches
Top-Down Approach
Uses industry reports and market research data.
- Formula: Total Industry Value x % of Market Relevant to You
- Pros: Fast, good for macro validation.
- Cons: Often overly optimistic, lacks specific detail.
Bottom-Up Approach
Uses your own data (pricing, expected customers).
- Formula: (Total Number of Potential Customers) x (Average Annual Revenue per Customer)
- Pros: More accurate, defensible to investors.
- Cons: Requires more research and specific data points.
Frequently Asked Questions
Tool Guide
What Problem This Solves
Founders often overestimate market size. This tool forces a bottom-up validation of your true revenue potential.
When to Use
Use during early idea validation, when preparing a pitch deck for investors, or when entering a new market segment.
When NOT to Use
Do not use for mature products with stable revenue history where historical data is a better predictor of growth.
Data You'll Need
Total number of potential customers, Average Annual Revenue per customer (ARPU), and realistic conversion rates.
What You'll Get
A defensible "Serviceable Obtainable Market" (SOM) value that you can confidently present to investors.
