Free Calculator

Equity Dilution Calculator

See how a new funding round affects your ownership percentage — enter your stake, pre-money valuation, and amount raised.

Your current ownership (%)

Pre-money valuation ($)

Amount raised ($)

Runs entirely in your browser — free, private, no sign-up.

Questions answered

Frequently asked questions

Everything you might be wondering about the Equity Dilution Calculator.

How does a funding round dilute my ownership?

When new shares are issued to investors, your existing shares stay the same in number but represent a smaller percentage of the now-larger total. Post-money valuation = pre-money + amount raised.

What is the difference between pre-money and post-money valuation?

Pre-money is the company’s value before the new investment. Post-money is pre-money plus the new cash raised. Your new ownership % = (your current % × pre-money) ÷ post-money.

Is it free and private?

Yes — it runs entirely in your browser, free, with nothing uploaded.

See it in action