Global Startup Funding Calculator
SAFE, Equity & Dilution Modeling for Founders and Investors
Free • No registration required • Private by default
Founders & ownership
SAFE instruments
Priced round & option pool
Live results
Founder Impact Summary
After conversion and the round, founders' ownership drops from 100% to 0%. Of the decline, 0 points come from the SAFEs, 0 from the new investment and 0 from the option-pool increase.
Warnings & notices
After entering your details you unlock: full cap table, shares per instrument, conversion price, mechanism per SAFE, dilution waterfall, scenario comparison and PDF.
Get the full report & detailed cap table
Enter your details to unlock the full cap table, conversion mechanics, dilution waterfall and PDF.
Methodology & Sources
- •Post-Money SAFE: indicative ownership = purchase amount ÷ post-money valuation cap, before the new priced round.
- •Conversion price: for each SAFE the engine computes the cap-implied price and the discount price (round price × (1 − discount)) and applies the lower price (more shares to the investor).
- •Option-pool top-up is solved iteratively (pre-money timing) so the pool reaches the target percentage of post-round fully-diluted shares.
- •All share counts are integers, so the cap table sums to 100% up to display rounding. Intermediate values are not rounded.
- •Checked against Y Combinator's official SAFE documents and SAFE User Guide, and the terms actually entered.
Y Combinator SAFE documents & SAFE User Guide (official). StartupLaw.tech is not affiliated with or endorsed by Y Combinator.
Last updated: 2026-07 · Example: v1.0.0
Frequently Asked Questions
Glossary
- SAFE
- Simple Agreement for Future Equity — converts into shares at a priced round.
- cap
- Valuation cap: maximum post-money valuation used to price the SAFE.
- discount
- Discount applied to the round price when the SAFE converts.
- postMoney
- Post-money: valuation after the investment (pre-money + new money).
- preMoney
- Pre-money: company valuation before the new money enters.
- optionPool
- Reserve of shares for future employee grants.
- proRata
- Right to invest in later rounds to maintain ownership percentage.
- dilution
- Reduction in an existing holder's percentage when new shares are issued.
This calculator provides an illustrative estimate based solely on the information entered. It does not constitute legal, tax, accounting or investment advice. Actual ownership and conversion outcomes depend on the executed documents, capitalization definitions, jurisdiction, financing terms and other facts. Consult qualified legal and tax advisers before signing or relying on any result.