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How to Calculate Equity Dilution

What is Equity Dilution?

Equity dilution reduces existing shareholders ownership when new shares are issued. Founders accept dilution in exchange for growth capital in startup fundraising rounds.

Formula

Investor ownership = New shares / (Old + New shares) x 100

Step-by-Step Guide

  1. 1Investor ownership = New shares / (Old + New shares) x 100
  2. 2Post-money valuation = Pre-money + Investment
  3. 3Share price = Pre-money valuation / existing shares outstanding

Worked Examples

Input
1M shares, issue 200K at $5M pre-money
Result
Investors get 16.7%, founders retain 83.3%, post-money = $6M

Frequently Asked Questions

What is Equity Dilution Calc?

Equity dilution reduces existing shareholders ownership when new shares are issued. Founders accept dilution in exchange for growth capital in startup fundraising rounds

How accurate is the Equity Dilution Calc calculator?

The calculator uses the standard published formula for equity dilution calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Equity Dilution Calc calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Equity Dilution Calc calculator use?

The core formula is: Investor ownership = New shares / (Old + New shares) x 100. Each step in the calculation is shown so you can verify the result manually.

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