Digital product
Market-Sizing Calculator (TAM/SAM/SOM)
A market size built from the bottom up, cross-checked against a top-down figure, and then subjected to the test that breaks most sizing: how many customers a month your obtainable share actually requires.
xlsx· v2.0· 88.5 KB
What you’ll get
- Build the number from the bottom up on Bottom-up. Every input needs a source.
- Cross-check against a top-down figure. If the two disagree by more than a factor of three, one is wrong.
- Reality check converts your SOM into customers per month and compares it to capacity.
- Diagnostics tells you whether the number would survive an investor's questions.
- 12 tabs, including a live dashboard, a diagnostics read-out and benchmarks
- Excel workbook with every formula visible and unlocked inputs, so you can change anything
- Worked examples built in: five filled scenarios you can switch between and edit
- Yours to keep. Works offline, no subscription, no account needed to open it

