Model SAFE and priced-round dilution free with GIGABOOST.AI — enter your SAFEs (post-money or pre-money), your planned option pool, and your priced round, and see exactly how much of your company you keep. The calculator runs the real conversion math: each SAFE converts at the lower of its valuation-cap price and its discounted round price, post-money SAFEs fix ownership per the YC standard, and the new option pool is carved out pre-money. It is free forever, and a free account (no credit card) unlocks your full before-and-after cap table.
What the Calculator Models
Post-money SAFEs — the investor's ownership is fixed before the new pool and new money, exactly per the YC post-money SAFE
Pre-money SAFEs — SAFEs that dilute each other and are diluted by the pool and the round
Valuation caps and discounts — each SAFE converts at whichever price gives the holder more shares
Option pool carve-out — sized as a percentage of the post-round company and carved out pre-money, so it dilutes founders and existing holders, not the new investors
The priced round itself — new investors end at round amount divided by post-money valuation
Full before/after cap table — founders, existing holders, each SAFE, the pool, and new investors, in shares and percentages
How It Works
Enter each SAFE: amount, valuation cap, discount, and whether it is post-money or pre-money.
Add your planned round size, pre-money valuation, and target option pool percentage.
See the resulting price per share and your complete before-and-after ownership breakdown. If you don't know your share count, the calculator models everything in percentages.
Frequently Asked Questions About the Free SAFE & Dilution Calculator
Is the SAFE & dilution calculator really free?
Yes. The SAFE & dilution calculator is free forever — you can model your SAFEs, option pool, and priced round at no cost, and a free account (no credit card) unlocks your full before and after cap table.
What do I need to get started?
You need your SAFE terms (amount, valuation cap, discount, and whether each SAFE is post-money or pre-money) plus your planned round size and pre-money valuation. If you don't know your share count, the calculator models everything in percentages.
How is SAFE dilution calculated?
Each SAFE converts at the lower of its valuation-cap price and its discounted round price when your priced round closes. Post-money SAFEs fix the investor's ownership before the new pool and new money; pre-money SAFEs dilute each other. The calculator runs this conversion math for every SAFE simultaneously.
Does the option pool dilute founders or investors?
In most term sheets the new option pool is carved out pre-money, which means it dilutes founders and existing holders — not the new investors. The calculator models the pool exactly this way, sized as a percentage of the post-round company.