New · Free tool
Dilution calculator: how much equity you keep after a funding round
Enter your ownership, the pre-money valuation and the amount raised. Add a pool top-up or converting SAFEs to see your stake after this round and after the rounds that follow.
| Stage | Your ownership | Change vs today |
|---|---|---|
| Today | 50.0% | – |
| After this round | 40.0% | -20.0% |
| After later round 1 | 32.0% | -36.0% |
| After later round 2 | 25.6% | -48.8% |
How is equity dilution calculated?
Dilution is the share of the company that goes to new holders. In a priced round the investors’ share is the amount raised divided by the post-money valuation, so raising $2M at an $8M pre-money sells 20 percent. Every existing holder keeps their percentage multiplied by one minus that share: a founder with 50 percent holds 40 percent after the round.
How much dilution is normal per round?
Founders typically give up 15 to 20 percent at pre-seed and another 15 to 25 percent at seed. After a Series A most founding teams hold 40 to 55 percent combined. Use the later-rounds fields to see where your own stake lands.
What else dilutes founders besides the round?
Two things that rarely appear in the headline number. An option pool top-up created before the round comes out of existing holders only. SAFEs and convertible notes convert into shares at the round and take their share of the post-money as well. Enter both to see the full dilution.
What this calculator leaves out
Liquidation preferences, multiple share classes and pro-rata rights. Use the Cap Table Simulator to model every holder across three rounds and the Stacked SAFE Calculator to work out what your SAFEs convert to.
Questions founders ask
Does dilution mean my shares are worth less?
Not necessarily. You own a smaller percentage of a company with a higher valuation and more cash. Dilution hurts when the valuation does not grow faster than the percentage you give up.
What is the difference between a dilution calculator and a cap table?
A dilution calculator follows one holder through a round. A cap table lists every holder and share class. Start here for a quick answer, then build the full table in the Cap Table Simulator.
Is my data stored?
No. Everything runs in your browser.
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Know the dilution. Now price the round.
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