Market Size Calculator
Estimate your total addressable market, serviceable market, and obtainable market instantly. Plan your business strategy with data-driven market sizing.
How to Use This Calculator
- Enter your target population: This is the total number of people or businesses in your target market segment. For example, India's smartphone users or urban millennials.
- Enter penetration rate: What percentage of this population currently uses products in your category? For e-commerce, this might be 30-40%. For niche products, it could be 5-10%.
- Enter average annual spending: How much does the average user spend annually on products/services in your category? Include all spending, not just one brand.
- Enter serviceable market percentage: Realistically, what portion of TAM can your business serve? Account for geographic limits, product fit, and resources. Usually 5-20%.
- Enter obtainable market percentage: What share of SAM can you realistically capture in 3-5 years? Be conservative. Usually 5-15% of SAM.
- Click Calculate: Get your TAM, SAM, and SOM estimates instantly.
Key Features
TAM Analysis
Calculate total addressable market instantly
Market Segmentation
Break down markets into SAM and SOM
Revenue Potential
Understand your realistic market opportunity
Adjustable Inputs
Test scenarios with different assumptions
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Works on any device, anytime, anywhere
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Formula & How It Works
Market sizing follows a top-down approach that breaks the total opportunity into realistic segments. This helps entrepreneurs and business planners understand growth potential and set achievable targets.
TAM = Population × Penetration Rate × Average Annual SpendingTAM Explanation: This is the total revenue available if you capture 100% of your target market segment. It's the ceiling of your potential market.
SAM = TAM × Serviceable Market %SAM Explanation: This represents the portion of TAM you can realistically serve with your product, team, and resources. It accounts for geographic limits and competitive focus.
SOM = SAM × Obtainable Market %SOM Explanation: This is your realistic revenue target for 3-5 years assuming good execution and market conditions. It's your achievable market share.
Practical Examples
What is Market Sizing?
Market sizing is the process of estimating the total revenue opportunity in a market. It helps entrepreneurs validate business ideas, secure funding, and set growth targets. The framework breaks markets into three layers: TAM, SAM, and SOM.
Investors always ask founders: "What's your TAM?" They want to understand the ceiling of your opportunity. A ₹1,000 crore market attracts more venture capital than a ₹100 crore market. Market sizing tells this story with numbers.
Understanding your market size helps you decide whether to enter a market, how aggressively to expand, and what revenue targets are realistic. It's the foundation of business strategy and financial planning.
📖 Market Sizing Concept in Your Language
Learn More About Market Sizing
Understand TAM-SAM-SOM framework, market research techniques, and how to validate your market size assumptions in our comprehensive guide.
Read Full Blog Post →Frequently Asked Questions
Is this tool free to use?
What is TAM (Total Addressable Market)?
What is SAM (Serviceable Addressable Market)?
What is SOM (Serviceable Obtainable Market)?
How do I calculate TAM?
What penetration rate should I use?
Can I use this for different geographies?
How realistic should my SAM and SOM percentages be?
How often should I recalculate market size?
What if my market size seems too small or large?
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