Get a clean ownership calculation without building a model from scratch.
Startup Finance
Dilution & cap table calculator that shows every shareholder's stake.
Model shareholders, new round shares, option pool, and price per share to see pre vs. post dilution, ownership breakdown, and implied valuation.
Direct answerA dilution calculator models how a new financing round changes each shareholder's ownership percentage by adding new investor shares and option pool reserves.
Browser-first workflowRound-by-round dilutionBuilt for startup teams
1. Enter round terms
CalculatorEnter new round shares, price per share, and option pool. Add existing shareholders in the table. Or load the sample scenario.
Enter assumptions or load a sample scenario to see the results.
Live Tool
Dilution & Cap Table Calculator in the browser
The functional tool stays first: enter shareholders and round terms, review the ownership math, and only then scroll into the guide below.
Privacy-first workflow
This page runs in the browser and does not upload any data.
What this tool is built to solve
A dilution calculator models how a new financing round changes each shareholder's ownership percentage by adding new investor shares and option pool reserves.
See exactly how each round changes the ownership pie.
Understand how new pool shares dilute existing holders.
Key signals
The result cards explain where dilution pressure is coming from.
Decision support
Use these cards to move from the calculation into the next financing or board conversation.
Detailed breakdown
The breakdown keeps the math explainable and export-ready.
See pre and post ownership for every row in the cap table.
Derives pre and post-money valuation from share price and count.
No cap table data leaves your device.
Take the ownership table into board decks or legal docs.
Guide Below The Tool
How to use the dilution & cap table calculator well
This section is written for searchers, answer engines, and busy startup teams: direct definitions, practical steps, and concrete follow-up guidance.
A dilution calculator models how a new financing round changes each shareholder's ownership percentage by adding new investor shares and option pool reserves.
Founders, CFOs, VCs, startup lawyers, and board members modeling financing rounds.
Existing shareholders and share counts, new round shares, price per share, and option pool size.
Workflow
Four practical steps
Use the tool as a fast decision layer. The goal is to move from raw cap table data to a clear ownership picture before you open a larger model.
1
Enter existing shareholders and their share counts.Add each shareholder or share class with the current number of shares outstanding.
2
Add new round shares, price per share, and option pool.Set the new investor shares, PPS, and any additional option pool shares for this round.
3
Review pre vs. post ownership for every stakeholder.Check the output and isolate which stakeholders are most affected by the round.
4
Export the cap table for board or investor review.Carry the result into the next board deck, investor meeting, or legal review.
Review Checklist
What reviewers usually validate first
These are the areas teams usually discuss first once the dilution calculation is visible.
Confirm every shareholder, option holder, and convertible instrument is included in the cap table.
Include all outstanding options, warrants, and convertible notes in the existing share count.
Verify the PPS matches the agreed term sheet or board resolution.
Confirm whether the new pool is sized pre-money or post-money and its effect on dilution.
Ensure SAFEs, notes, and warrants are modeled as converting before or alongside the new round.
Cross-check the implied pre and post-money valuation against market comps and prior rounds.
Why This Page Exists
Built to close the gap between a spreadsheet cap table and a clear ownership picture
Most search results either define dilution or sell a larger platform. This page solves the immediate job first: use the tool, see the answer, and understand what it means before you move into a deeper cap table workflow.
The functional tool stays on top so founders can check dilution before reading a guide.
The result cards explain ownership impact instead of leaving users with raw numbers.
Ledger Summit can build richer cap table tooling later, but this page delivers value now.
FAQ
Dilution & cap table questions, answered directly
Written in short form so searchers can get a clear answer without digging through generic product copy.
It models how a new financing round changes each shareholder's ownership by adding new investor shares and an option pool.
Founders, CFOs, VCs, startup lawyers, and board members modeling financing rounds.
Existing shareholders and share counts, new round shares, price per share, and option pool size.
No. Everything runs in your browser.
Yes. If you need multi-round waterfall modeling or a full cap table platform, Ledger Summit can build it.
Next Step
Need this connected to a broader workflow?
Use the free browser tool first. If you need a richer model, reporting automation, or an internal production version, Ledger Summit can build the next layer around your process.
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