Calculate how much founder ownership changes after issuing new shares. The tool shows new ownership, investor stake, dilution percentage, and whether the round creates excessive cap table pressure.
The result shows the financing impact on ownership, valuation, conversion, or dilution. A stronger result protects founder ownership while preserving enough incentive for investors and employees.
This estimate is educational and should not replace legal, tax, or fundraising advice. Real term sheets may include preferences, pro rata rights, participation, vesting, and other provisions.
If 1,000,000 shares exist and 250,000 new shares are issued, the new investors own 20% of the company and existing holders are diluted by 20%.
Seed rounds often dilute founders meaningfully, but the acceptable range depends on valuation, round size, investor terms, and the option pool.
Divide the founder share count by the fully diluted post-financing share count after new investor shares and option pool adjustments.
Your percentage ownership usually decreases as new investor shares and sometimes a refreshed option pool are added to the cap table.
You can reduce dilution by raising at a higher valuation, raising less capital, improving traction, or negotiating option pool treatment.
An option pool increases fully diluted shares and can reduce founder ownership, especially when the pool is created before the investment.
| Module | What it shows |
|---|---|
| Main Result | Primary startup finance output for this calculator. |
| Ownership Impact | How the scenario changes equity or valuation. |
| Health Score | Practical quality score from the result. |
| Decision Signal | Recommended action based on the result. |