Preference Stack (newest = most senior)

Common (founders, employees, you?)

Your Stake

Exit

Exit value
Your Proceeds
Naïve Expectation
ownership × exit
Preference Stack
paid before common
Common Breakeven
exit where common gets paid

The waterfall at this exit

ClassChoosesPreferenceAs-Converted %Payout% of Exit

Your proceeds across exit values

Where the preference stack stops mattering for you.
Exit ValueYour ProceedsNaïve (own% × exit)Haircut
Model: preferences paid newest-round-first (stacked seniority); non-participating preferred takes the better of its preference or converting to common; participating preferred takes its preference and shares in the remainder (no participation cap modeled). Ignores option pools, escrows, carve-outs, debt, and transaction costs. A modeling aid, not investment or legal advice.
Also try: SAFE Simulator — model how a post-money SAFE converts and what your stake is worth.