Startup Equity Dilution & Cap Table Simulator
Stack SAFEs and priced rounds, watch founder ownership shrink.
Founder ownership
Started at
100%
Now
67.50%
Final cap table
After all rounds above.
- Founders67.50%
- Series A20.00%
- Option Pool8.00%
- SAFE 14.50%
This is a simplified model for directional understanding — SAFEs are modeled as converting immediately at their cap, not deferred to a later priced round. Use real cap table software (like Carta or Pulley) and a startup lawyer for anything you're actually signing.
About this tool
Add a sequence of SAFEs, convertible notes, and priced equity rounds — each with its own cap, discount, or pre-money valuation — and instantly see how founder ownership dilutes round by round, including a correctly-modeled option pool shuffle.
How to use Startup Equity Dilution & Cap Table Simulator
- 1
Click "Add SAFE / Note" or "Add priced round" to build your funding sequence in order.
- 2
Fill in each round's amount, and either a valuation cap (SAFE) or pre-money valuation (priced round).
- 3
For priced rounds, set an option pool top-up percentage if one applies — it dilutes before the new investor's stake is calculated.
- 4
Watch founder ownership and the full cap table update after every round you add.
Frequently asked questions
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