Equity Dilution Calculator
Calculates how much your ownership dilutes after raising a round.
Every calculation runs instantly in your browser, so your inputs are never sent to a server, and the tool is free with no sign-up. You can save the results as an Excel file with live formulas and reuse them later.
Inputs
- Your current ownership (%)
- Pre-money valuation ($)
- Investment raised ($)
Example calculation
Diluted ownership: 48%
| Post-money valuation | $10,000,000 |
|---|---|
| New investor share | 20% |
| Your stake value | $4,800,000 |
Method & notes
post-money = pre-money + investment. Existing holders dilute by pre/post (excludes option pool).
Tips
Change any input and the result recalculates in real time. After downloading the Excel file, you can reuse it by editing only the yellow input cells.
FAQ
How does the Equity Dilution Calculator work?
Calculates how much your ownership dilutes after raising a round. post-money = pre-money + investment. Existing holders dilute by pre/post (excludes option pool).
Can I save the results?
Yes. You can download the results for free as an Excel (.xlsx) file with live formulas that recalculate when you change the yellow input cells.
Is it free?
Yes — all Calcova calculators are free, and you can save results as an Excel file.