BUSINESS · FUNDRAISING
Equity dilution calculator
Estimate how a new investment round could change existing ownership in a simple share-based scenario.
YOUR OWNERSHIP AFTER THE ROUND
0%
Simple scenario before option pools and other changes
Ownership before 0%
New investor ownership 0%
New shares issued 0
Post-money valuation $0
How equity dilution is calculated
The estimated new shares equal the existing shares multiplied by investment divided by pre-money valuation. Your ownership is your unchanged share count divided by total shares after the issue.
New shares = existing shares × investment ÷ pre-money valuation
Static examples
| Founder before | Pre-money / investment | Investor after | Founder after |
|---|---|---|---|
| 60% | $4m / $1m | 20% | 48% |
| 50% | $8m / $2m | 20% | 40% |
| 40% | $3m / $3m | 50% | 20% |
Questions
Why can the outcome differ from a term sheet?
Option pools, convertibles, SAFEs, preferences and the agreed cap-table mechanics can change the result.