Finance
Founder Dilution Calculator
Model cumulative founder dilution through multiple funding rounds with option pool refreshes.
What this calculator does
The Founder Dilution Calculator track dilution across multiple rounds, then compares your result against operator benchmarks (Typical founder ownership at exit: 10-25%.). Enter your numbers below and you'll get a result, a benchmark band, and a plain-English interpretation in under two minutes.
Seed Round
Series A
Series B
Final Founder Ownership
50.1%
Total dilution: 49.9%
After Round 1
80.0%
Dilution: 11.1%
After Round 2
63.3%
Dilution: 16.7%
After Round 3
50.1%
Dilution: 16.7%
Total Dilution
49.9%
Formula
Cumulative Dilution = 1 - Π(1 - Round Dilution)Benchmarks: Typical founder ownership at exit: 10-25%.
Sources: OpenView 2024 SaaS Benchmarks, ChartMogul Retention Reports, ProfitWell Pricing Studies, and Pressense operator data.
Frequently asked questions
How much dilution per round?
Typically 15-25% per priced round plus option pool refresh.
About this calculator
Built and reviewed by the Pressense team, a strategy and systems partner working with B2B SaaS operators on unit economics, retention, GTM, and positioning. Every calculator in this library uses public benchmarks from OpenView, ChartMogul, ProfitWell, and KeyBanc, supplemented with anonymised data from the operators we partner with.
Disclaimer: This calculator is for educational and planning purposes only. Outputs are estimates based on the inputs you provide and industry benchmarks, not financial, tax, legal, or investment advice. Validate all results with a qualified professional before making decisions about funding, valuation, hiring, or capital allocation.