The SAFE Conversion Calculator estimates the number of shares issued when a SAFE converts in a priced equity round. It compares a simplified valuation-cap conversion price with the discounted round price and uses the lower price, which generally gives the SAFE holder more shares. This model is useful for preliminary cap-table scenarios, but SAFE documents vary. Post-money versus pre-money forms, company capitalization definitions, pro rata rights, multiple SAFEs, and round mechanics can materially change the final conversion.
1. Enter the SAFE amount
Use the purchase amount that will convert, excluding any amounts that do not participate.
2. Enter the valuation cap
Use the cap stated in the SAFE.
3. Enter the round valuation and price
Provide the priced-round pre-money valuation and price per share.
4. Enter the discount
Use the contractual discount percentage, or zero when none applies.
5. Review the controlling conversion term
The calculator selects the lower of the cap-derived and discounted prices.
Where:
Assumptions: This simplified model uses the ratio of valuation cap to round pre-money valuation and does not reconstruct the company capitalization definition in the SAFE.
A lower conversion price creates more shares for the same SAFE investment amount.
Use the capitalization and conversion definitions in the signed SAFE for an authoritative cap table.
Given: SAFE = $500,000; cap = $8M; round pre-money = $12M; discount = 20%; round price = $2.00.
Calculation: Cap price = $2 × ($8M ÷ $12M) = $1.3333. Discount price = $2 × 80% = $1.60. The cap price is lower. Shares = $500,000 ÷ $1.3333 = 375,000.
Result: The SAFE converts into an estimated 375,000 shares at about $1.3333 per share.
The SAFE commonly converts using the method that produces the lower price, subject to the exact document terms.
It is a simplified price comparison and does not fully reproduce either form’s capitalization mechanics. Review the signed form.
Standard SAFEs generally do not accrue interest, unlike convertible notes, but the document controls.
The actual calculation may use company capitalization definitions, option pools, multiple securities, and rounding rules not represented here.
Use it as a preliminary scenario only. Final conversion should be calculated from the financing documents and verified by counsel or a cap-table professional.