Download Mobile AppDilution Calculator
See how funding rounds impact your equity ownership. Model different scenarios to understand dilution.
Understanding Dilution
Dilution reduces your ownership percentage when new shares are issued. Each funding round typically dilutes existing shareholders by 15-25%. This calculator helps you model how multiple rounds affect your stake.
Funding Rounds
Ownership After Dilution
Model dilution before the term sheet
Dilution scenarios help founders understand how funding rounds change ownership, control, and future planning before negotiations begin.
Compare round sizes
Model smaller and larger checks to see how much ownership changes for each funding path.
Track post-money impact
Use post-money valuation to understand the investor share created by each round, not only the cash received.
Plan future rounds
Look beyond the next raise so founder ownership, option pools, and follow-on funding stay realistic.
Make funding scenarios easier to act on
Dilution planning works best when assumptions, investor conversations, and founder decisions stay connected in one operating workspace.
- Save each funding scenario in a shared doc so founders can compare assumptions before investor calls.
- Create tasks for legal, finance, and board follow-ups after the preferred scenario is chosen.
- Keep founder decisions, cap table notes, and meeting outcomes visible to the people executing the plan.
Startup dilution calculator FAQs
Dilution means a founder owns a smaller percentage of the company after new shares are issued to investors, employees, or other stakeholders.
Many startup rounds dilute existing shareholders by about 15 to 25 percent, but the actual amount depends on valuation, investment size, and deal structure.
Multiple scenarios show how ownership changes over time, which helps founders plan option pools, future raises, and decision rights.