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Good Combinator

Equity calculator

See what 7% actually costs you—and what it buys.

Plug in your cap table. The calculator shows two paths side by side: raising alone versus taking the accelerator. Most founders find the net position is stronger after acceleration because the follow-on round is larger and arrives faster.

Founders Cap table Series A modeling

What you get

A side-by-side cap table comparison you can screenshot and share with your cofounder.

  • Two paths modeled—bootstrapping to Series A alone vs. accelerator first
  • Real dilution math—founder ownership, option pool, and investor shares at each stage
  • Dollar value of your stake—because percentage alone is misleading

Your numbers

Start with where your cap table is today.

Current cap table

2

Founding team members splitting equity

90%

Combined founder equity before this round. Below 100% if you've given equity to early employees or angels.

10%

Employee stock option pool already allocated

Series A assumptions

$8M

Estimated pre-money valuation if you raise Series A without accelerator signal

$12M

Estimated pre-money with accelerator signal, demo day, and investor intros. Median uplift for top-tier programs is 40-60%.

$3M

How much you plan to raise in the Series A round

10%

Additional option pool investors typically require at Series A (carved from pre-money)