Convertible Note Conversion Calculator

Background.

Use Convertible Note Conversion Calculator when you need to convert principal plus designated accrued interest at the better of discount price and cap price. A convertible note is debt until conversion and may convert accrued interest only if the note says so. Here the arithmetic follows “conversion shares = (principal + converting interest) ÷ min(discount price, cap price),” rather than silently mixing alternatives.

The editable entries are convertible-note principal, accrued interest converting with note, new-money price per share, conversion discount, price per share implied by valuation cap. Use values from the document or measurement that governs this convertible note conversion question; the defaults are only the worked fixture below. The most consequential input mistake would be to ignore that qualified-financing thresholds, maturity treatment, cap capitalization, interest accrual and rounding come from the note.

National Venture Capital Association, Model Legal Documents; preferred-stock financing terms documents the convention or governing rule used here. The convertible note conversion output is a transparent scenario under those facts: it does not manufacture an unentered market price, professional determination, carrier quote, legal eligibility finding or locally adopted code value.

What is convertible note conversion calculator?

Convertible Note Conversion is the relationship behind this decision: a convertible note is debt until conversion and may convert accrued interest only if the note says so. On this page it means conversion shares = (principal + converting interest) ÷ min(discount price, cap price). Qualified-financing thresholds, maturity treatment, cap capitalization, interest accrual and rounding come from the note; that is the line between the reported quantity and a broader corporate finance analysis.

How to use this calculator.

1. 01Confirm that “conversion shares = (principal + converting interest) ÷ min(discount price, cap price)” matches the convertible note conversion convention you need.
2. 02Replace the fixture values for convertible-note principal, accrued interest converting with note, new-money price per share, conversion discount, price per share implied by valuation cap with dated values from the governing record.
3. 03Keep all currencies, measurement units and time periods on the same basis before calculating.
4. 04Read convertible-note conversion shares together with this boundary: Qualified-financing thresholds, maturity treatment, cap capitalization, interest accrual and rounding come from the note.

The formula.

The calculation uses conversion shares = (principal + converting interest) ÷ min(discount price, cap price). In this convertible note conversion model, the entered terms are convertible-note principal, accrued interest converting with note, new-money price per share, conversion discount, price per share implied by valuation cap. A convertible note is debt until conversion and may convert accrued interest only if the note says so, which is why the relationship is presented under this name rather than as a universal alternative. Qualified-financing thresholds, maturity treatment, cap capitalization, interest accrual and rounding come from the note. Calculations keep full decimal precision through the relationship and round only the returned display values.

A worked example.

Frequently asked questions.

References& sources.

1. [1]National Venture Capital Association, Model Legal Documents; preferred-stock financing terms. Retrieved 2026-08-07. access: open unless marked otherwise.
2. [2]U.S. Securities and Exchange Commission. Investor.gov glossary: Convertible securities. Retrieved 2026-08-07. independence: primary; access: open.
3. [3]U.S. Securities and Exchange Commission. Investor.gov glossary: Dilution. Retrieved 2026-08-07. independence: primary; access: open.