Cap Table with SAFE and Convertible Note Conversion
Option pool top-up, dilution, exit waterfall
Converts post-money SAFEs and notes into a priced round with pool top-up; round price, dilution per holder and a 1x preference exit waterfall.
Choose the licence on the Gumroad page. Payment and VAT are handled by Gumroad, the merchant of record.
The cap table founders and seed investors argue about, with the arithmetic done properly. Post-money SAFEs convert at cap over company capitalisation including all SAFE shares, which is circular; this workbook solves it in closed form instead of guessing. Notes convert at the lower of their cap price and the discounted round price. The option pool is topped up in the pre-money to a target share of post-money capital, also in closed form. Then the round is priced, every holder's dilution is shown, and an exit waterfall splits the proceeds.
- Inputs: existing holders and classes, post-money SAFEs (amount, cap, discount), convertible notes (principal, accrued interest, cap, discount), the priced round (pre-money, new money, target pool share, lead investor), exit value and preference multiple.
- Conversion: the SAFE capitalisation solution (total SAFE shares = N0 x / (1 - x)), cap prices, discount test, shares per instrument; pass 1 on caps, pass 2 with the discount test; pool top-up, pre-money fully diluted shares, round price, new investor shares, post-money shares and two checks.
- Cap table: shares and percentage before and after, dilution in percentage points, value at the post-money for every holder, founders' combined ownership.
- Exit waterfall: the new round takes the greater of its 1x non-participating preference and its as-converted share; the rest is shared pro rata; proceeds, share of exit and multiple on money for every holder.
Rebuilt independently in Python from the same inputs and matched cell by cell before listing. The Guide states every convention (post-money SAFE, pre-money note cap, pre-money pool top-up, zero-strike options in the waterfall) so you can change the one your documents differ on. Live formulas, no macros, no locked cells. Excel and Google Sheets.
Who it is for: founders modelling a round before the term sheet, angels and seed funds checking a proposed cap table, accelerator and law-firm teams who need the mechanics in a file the client can read.
What is inside
1 Excel workbook (.xlsx), sheets: Conversion, Inputs, Cap table, Exit waterfall, Guide
Use it if
You are raising or investing in a priced round on top of SAFEs or notes and need the conversion and dilution computed, not estimated.
Not for
You need multi-class participating preferences or strike-adjusted option waterfalls; the waterfall here is one preferred class, 1x non-participating.
Sheet previews
How buying works
- Choose a licenceSingle user for one person, team for up to 10, consultancy to use with clients. The buttons above go to the Gumroad page.
- Pay on GumroadCard or PayPal; Gumroad is the merchant of record and handles VAT and the receipt.
- Download the fileThe .xlsx arrives on the receipt page and by email. It opens in Excel and Google Sheets; nothing to install.
- Use itYellow cells are inputs, blue cells are formulas, every figure names its source. Questions: reply to the receipt; every reply is read and answered, usually the same day.
Try the free cap table calculator first: SAFEs and notes into a priced round, in your browser.
Search terms this page answers: cap table template safe conversion excel, post-money safe cap table calculator, convertible note conversion dilution model.