Funding dilution calculator.
Model a simple priced funding round. See the post-money valuation, new investor share, and your ownership after the raise.
No account. No email. Your inputs stay in this page.Refreshing or leaving the page clears your work.
See the ownership trade-off.
Explore one simple priced equity round. Start with the valuation, new capital, and your ownership before the round.
Agreed company valuation immediately before this priced equity round. Must be greater than zero.
Cash invested in the priced round. This model excludes SAFEs, notes, options, fees and secondary sales.
Your percentage before the round. Assumes you do not buy any of the new shares.
All money amounts are in US dollars (USD). Change the illustrative starting values to fit your business.
- Your ownership after this round
- 64% Your modeled share after issuing equity for the new investment.
- New investor ownership
- 20% The new investment divided by post-money valuation.
- Your dilution
- 16 pp Percentage points of ownership given up, not a cash loss or a change in business value.
- Post-money valuation
- $2,500,000 Pre-money valuation plus the new investment.
Post-round ownership, across the whole company
- All pre-round holders
- 80%
- New investor
- 20%
| Holder | Ownership after round |
|---|---|
| Your existing stake | 64% |
| Other existing holders | 16% |
| New investor | 20% |
A smaller percentage does not by itself tell you whether a financing is worthwhile. Consider the capital required, the milestones it supports, and the full terms of the round. This model shows ownership arithmetic only.
Print your inputs, results, and assumptions, or choose “Save as PDF” in your browser. Your entries stay in this page.
Useful numbers.
Clear assumptions.
Post-money valuation = pre-money valuation + new investment · New investor share = investment ÷ post-money valuation · Existing stake after = existing stake before × (1 − new investor share)
This is a single priced equity round with one new investor and no changes to the pre-round ownership structure. Percentage-point dilution is the difference between your before and after ownership percentages.
The calculation excludes SAFEs, convertible notes, option-pool creation or expansion, warrants, multiple share classes, liquidation preferences, fees, taxes, and transaction-specific provisions. Those terms can materially change the result. Confirm the actual cap table and financing documents with qualified advisers.
You don’t have to build alone.
Meet founders, investors, and operators working to build businesses that matter. Based in Santa Monica. Launching globally.