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Finance calculator

Equity Ownership Calculator

Calculate an ownership percentage from the number of shares owned and the company’s total shares outstanding.

Calculator Your inputs stay in the tool you embed here.
$
Your ownership
0%
Implied value of your stake$0

Everything here runs locally in your browser. Nothing you type is sent anywhere.

How this calculator works

Enter shares owned and total fully diluted shares. The calculator divides your shares by the total share count.

Formula Ownership % = Shares owned ÷ Total shares outstanding × 100

When to use it

Use it to model founder, employee or investor ownership before and after changes to the cap table.

Important

This calculator is for estimation and planning. Actual financial outcomes can differ because of taxes, fees, timing, market conditions, lender terms and other factors.