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Convertible Note Calculator
Calculate how many shares a convertible note converts into at a future priced round, using accrued interest and whichever of the discount or valuation cap is more favorable to the investor.
How to Use Convertible Note Calculator
- 1Enter the note principal, interest rate, and months outstanding
- 2Enter the conversion discount % and valuation cap
- 3Enter the priced round's price per share and pre-money valuation
- 4Click Calculate to see the conversion price used and shares received
Frequently Asked Questions
The tool computes a conversion price both ways — applying the discount % to the round's price per share, and separately implying a price from the valuation cap relative to the round's pre-money — then uses whichever price is LOWER, since a lower conversion price gives the investor more shares. This is standard convertible note mechanics.
A convertible note is a debt instrument that accrues interest over time (added to principal before conversion); a SAFE (Simple Agreement for Future Equity) is not debt and accrues no interest. Both use the same discount-vs-cap conversion logic once you have an amount to convert.
You need a hypothetical or actual future round's price per share and pre-money valuation to run this calculation — it estimates what WOULD happen at conversion, not a valuation of the note today.
No — it only computes the conversion mechanics (interest accrual + discount/cap), not maturity date handling, which is a separate term in the actual note agreement.
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