Startup funding · Future equity

SAFE Investment Calculator

Compare a post-money valuation cap with a discount and estimate SAFE conversion ownership after a priced round.

SAFE and round assumptions

CurrencySAFE investmentPost-money valuation capDiscount (%)Current fully diluted sharesPriced round pre-money valuationNew priced-round investment

Conversion and ownership

Conversion method—

Priced-round share price—

SAFE conversion price—

Estimated SAFE shares—

SAFE ownership before priced round—

SAFE ownership after priced round—

New round investor ownership—

Existing holder ownership—

Value at priced-round price—

Estimated conversion advantage—

How this SAFE estimate works

For one post-money valuation-cap SAFE, the calculator starts with the ownership percentage implied by SAFE investment ÷ valuation cap. It also calculates the shares produced by the entered discount, then uses whichever method gives the SAFE holder more shares.

The estimate uses the current fully diluted share count as a simplified company capitalization and assumes the priced-round share price is its pre-money valuation divided by that count. Multiple SAFEs, option-pool changes, convertible securities and document-specific definitions can materially change conversion. Review the official Y Combinator SAFE guide and your signed documents with qualified counsel.