Startup Dilution Calculator

Model equity dilution for priced rounds, SAFEs, and convertible notes. See your cap table before and after investment. Free, no signup required.

Cap Table Setup

Standard is 10,000,000 shares

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Frequently Asked Questions

How does dilution work in a startup?

Dilution occurs when a startup issues new shares to investors, reducing the percentage ownership of existing shareholders. For example, if you own 100% of 1 million shares and issue 250,000 new shares to an investor, you now own 80% of 1.25 million shares.

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

Pre-money valuation is what your company is worth before the investment. Post-money valuation equals pre-money plus the investment amount. A $4M pre-money with a $1M investment gives a $5M post-money valuation, meaning the investor gets 20% ownership.

How does a SAFE affect dilution differently than a priced round?

A SAFE (Simple Agreement for Future Equity) does not create dilution immediately. It converts to equity at the next priced round, typically at a discount or valuation cap. This means the dilution impact is deferred and depends on the terms of the next round.

What is a typical option pool size?

Most VCs expect a 10-20% option pool at the time of investment. The pool is typically created from pre-money shares, meaning it dilutes existing shareholders (founders) more than investors. A 15% pool is the most common at seed stage.