Startup fundraising math without the spreadsheet fog.

FounderMath is a static-first utility site for founders who need fast educational estimates for valuation, dilution, and SAFE conversion scenarios.

Simple Pre/Post-Money Calculator

Enter pre-money and post-money valuations to estimate the percent sold, without share inputs.

Translate between investment amount, valuation, ownership, and optional share counts.

Estimate the conversion price and shares from valuation caps and discounts.

See how new money and option pool top-ups reduce founder ownership.