Cap Table & Dilution Calculator
Free tool · by Daniel HaketSee exactly how much of your company you'll own after raising. Enter your funding rounds (investment + pre-money) and this shows the ownership split and how founders dilute round by round — the cap-table math founders usually run in Carta or pay a lawyer for.
Founders start owning 100%. Add the funding rounds below to see how everyone gets diluted.
How dilution works
Each funding round issues new shares, so your slice of a bigger pie shrinks — that's dilution. The price per share is the pre-money valuation ÷ existing shares; the investor's new shares are their investment ÷ that price. Raise at a higher pre-money and you sell less of the company for the same money, which is why valuation matters so much. This model keeps it clean (it doesn't include option pools, which dilute founders further), so treat it as the directional picture — the real term sheet has more moving parts.
Frequently asked questions
What is a cap table?
A capitalisation table lists who owns what share of your company. After each funding round it shows the updated ownership split between founders and investors.
How does a funding round dilute founders?
New shares are issued to the investor, increasing the total. Your share count stays the same but the total grows, so your percentage drops — even though the company (and your stake's value) is usually worth more.
Does this include the option pool?
No — to keep it clear it models founders and investors only. Real rounds usually add or expand an employee option pool, which dilutes founders a bit more. Factor that in separately.
How do I keep more of my company?
Raise less, raise at a higher valuation, or raise later once you've de-risked. And get the legal setup right early — a service like doola helps with formation and the back office.
More free calculators
This tool is free and runs entirely in your browser. The link above is an affiliate link: we may earn a commission if you sign up, at no extra cost to you, and it never changes our honest take.