Equity Dilution Calculator
See how much of the company you keep after each funding round, with option pool top-ups included.
Quick answer
A funding round gives new investors investment / post-money valuation, where post-money = pre-money + investment. Existing holders keep their stake x (1 - new investor %), and an option pool top-up dilutes them further.
Equity Dilution Calculator
Funding Rounds
Your Ownership After Last Round
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Percentage Points Diluted
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Relative Reduction
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Stake Value (paper)
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Total Raised
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Your ownership by round (%)
Round-by-Round Ownership
| Round | Investment (₹) | Post-money (₹) | New investors | Pool top-up | You after |
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Assumptions & method
- Post-money = pre-money + investment. New investor share = investment ÷ post-money.
- Pool top-up % is the new reserved share of the post-round company and is treated as part of the pre-money, so it dilutes existing holders only.
- Your ownership after a round = before × (1 − investor share − pool top-up share).
- Fully diluted percentages; earlier investors and the existing pool are diluted by the same factor as you.
- Not included: secondary sales, vesting, liquidation preferences, anti-dilution terms, SAFEs or notes that convert later.
Results are estimates based on the figures you enter. They are not guarantees and not financial advice.
How funding rounds dilute ownership
When a company issues new shares, every existing holder owns a smaller percentage, even though their share count is unchanged. In a priced round the new investor receives investment divided by post-money valuation, and any option pool top-up adds further reserved shares. Existing holders share what remains, so your ownership is multiplied by one minus the investor share and one minus the pool top-up share. Over several rounds those factors multiply, which is why a founder who starts with a majority can finish with a minority. The table and chart follow your ownership through each round and show the paper value of the stake.