Equity Dilution Calculator

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

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.

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

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.