Post-money SAFE calculator
SAFEs look simple until they convert. This calculator turns your post-money SAFEs into ownership percentages at the priced round: enter each SAFE's investment and valuation cap (or discount), plus the round's pre-money valuation, and see the percentage each investor receives and how much founders are diluted. It uses the YC post-money SAFE logic, where the cap sets ownership directly. No login, no spreadsheet gymnastics.
| SAFE | Invested | Ownership |
|---|---|---|
| Angel | $250,000 | 3.1% |
| Seed fund | $750,000 | 7.5% |
Uses post-money SAFE logic (ownership = investment ÷ cap). Discounts, MFN terms and pro-rata can change the result. Confirm the final cap table with your counsel.
How it works
- 1Enter each SAFE: the amount invested and its valuation cap or discount.
- 2Enter the priced round's pre-money valuation and new money raised.
- 3The tool converts every SAFE and shows ownership percentages and founder dilution.
Frequently asked questions
How does a post-money SAFE convert?+
With a post-money valuation cap, the SAFE investor's ownership is their investment divided by the cap, calculated after other SAFEs but before the new priced-round money. That is the key difference from pre-money SAFEs, which dilute each other.
What happens with a discount instead of a cap?+
A discount lets the SAFE convert at a reduced price compared to the priced round. The tool applies whichever is more favorable to the investor when both a cap and a discount are present, which is the standard SAFE term.
Do SAFEs dilute founders before the round?+
Post-money SAFEs lock in the investor's percentage of the post-money company, so the dilution lands on founders and earlier holders rather than on the new SAFE investors. The tool shows the total founder dilution once everything converts.
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