-
Total Notes + Interest
-
Investor Dilution
-
Founder Ownership

Cap Table After Conversion

Ownership breakdown after all convertible notes convert

Valuation Cap Conversion BETTER

Discount Conversion WORSE

Interest Accrual Over Time

How note balances grow as interest accrues toward maturity

Note Conversion Details

How each note converts — principal, accrued interest, shares, and ownership

Note Principal + Interest Method Effective $ Shares Ownership

Convertible Note vs SAFE Note

Convertible notes are debt — they accrue interest and have a maturity date. If the note doesn't convert, investors can demand repayment. SAFE notes are not debt — no interest, no maturity, no repayment obligation. Y Combinator created SAFEs specifically to avoid the complexity of convertible notes. Try our SAFE calculator to compare.

What Happens at Maturity?

If no qualified financing has occurred by the maturity date, investors can: (1) demand repayment of principal + accrued interest, (2) convert at the current fair market valuation, or (3) negotiate an extension. In practice, most notes convert during a priced round before maturity. But if your startup struggles to raise, the debt obligation can create real pressure.

Get Your Full Equity Report

See exactly how all your notes, SAFEs, and funding rounds affect your equity — in one comprehensive report.

Generate Free Report
Or get a professional equity report — $9.99 one-time

Embed Free Startup Calculators on Your Site

Add equity dilution, SAFE note, runway, and offer comparison calculators to your website. One line of code.

Get Embed Code → For Accelerators