Cap Table & Equity Dilution Modeler

Walk a founder's ownership through Seed, Series A and Series B, option pool top-ups included, and see exactly where the stake ends up.

Reading This Tool

How To Use This Calculator

Set the pre-money valuation and new investment for each round, plus any employee option pool top-up.

Option pools are conventionally created or topped up out of the pre-money valuation, which means founders (and earlier investors) absorb that dilution alongside the new investor's stake, a detail that surprises a lot of first-time founders. The stacked bar shows exactly how the pie gets re-sliced at each round.

Your Inputs

Seed Round

Seed Pre-Money Valuation $4,000,000

Seed Investment Raised $1,000,000

Seed Option Pool Top-Up 10%

Series A

Series A Pre-Money Valuation $16,000,000

Series A Investment Raised $6,000,000

Series A Option Pool Top-Up 3%

Series B

Series B Pre-Money Valuation $60,000,000

Series B Investment Raised $20,000,000

Each round dilutes every existing holder, founders, earlier investors and the option pool, proportionally, based on the new investor's and any new pool percentage of the post-money cap table.

After Series B

Founder Final Ownership

0.0%

Seed Investor, Final Stake

0.0%

Series A Investor, Final Stake

0.0%

Series B Investor, Final Stake

0.0%

Option Pool, Final Size

0.0%

Ownership By Stage

Founder Seed Series A Series B Option Pool

This assumes clean, standard-terms priced rounds with no convertible notes, SAFEs, pro-rata top-ups, or liquidation preference stacking, all of which affect a real cap table. It's built to show the shape of sequential dilution, not to replace an actual cap table model from your lawyer or fund administrator.

Now find out what that remaining stake is actually worth.

Continue to the Business Valuation Matrix →