#970 · Startup Tool

Founder Equity Calculator

Estimate founder dilution, post-money valuation, future ownership, and potential exit value after a financing round.

Calculator

Startup assumptions
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How to use this calculator

  • Enter current founder ownership and company valuation.
  • Add new investment amount and expected exit valuation.
  • Review diluted ownership and projected founder exit value.

What the result means

The result estimates the value of founder equity after dilution. It helps founders compare capital raised against long-term ownership value.

Investor ownership = investment ÷ post-money valuation. Founder exit value = exit valuation × diluted founder ownership.

This model ignores liquidation preferences, taxes, vesting, secondary sales, and option pool changes.

Example calculation

If a founder owns 70%, raises $2,000,000 at an $8,000,000 valuation, and exits at $100,000,000, diluted ownership is 56% and exit value is $56,000,000.

Tips for better results

  • Raise after reaching milestones to reduce dilution.
  • Model future rounds before accepting current terms.
  • Consider control, motivation, and option pool needs, not only exit value.

FAQ

How much equity should founders keep after multiple funding rounds?

Founders should keep enough equity to remain motivated and credible through future rounds.

How do I calculate founder dilution after Series A?

Founder dilution after Series A is calculated by reducing ownership according to newly issued investor and option pool shares.

What percentage of equity should employees receive?

Employee equity often comes from an option pool, commonly around 10–20% depending on stage and hiring needs.

How much could my startup equity be worth at exit?

Startup equity at exit depends on exit valuation, final ownership, preferences, taxes, and vested shares.

How does raising at a higher valuation affect founder ownership?

A higher valuation reduces the percentage sold for the same investment amount, lowering founder dilution.

Startup decision modules

ModuleWhat it shows
Main ResultPrimary startup KPI for this calculator.
Health Score0–100 score based on founder-friendly thresholds.
Scenario SignalShows whether the current assumption is healthy, average, or risky.
RecommendationPractical next action for fundraising, growth, retention, or cost control.

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