Equity Dilution Simulator

Enter founder share count and add funding rounds with investment amount and pre money valuation. The tool models a cap table across stages. Start with 10 million founder shares as a common baseline. Add each round in chronological order since later rounds calculate price per share from cumulative share count. Include angel and friends and family rounds before institutional Seed to see full dilution path from founding. Enter pre money valuation and new investment for priced round, or option pool increase percent for refresh scenarios common before Series B. Enter option pool top up percent from term sheet separately from new investor primary round dilution. Enter pre money valuation and new investment for priced round, or option pool increase percent for refresh scenarios common before Series B. Enter option pool top up percent from term sheet separately from new investor primary round dilution.

Review stage by stage ownership percentages, share counts, post money valuations, and cumulative dilution from founding to final round. Compare raising 2M at 8M pre versus 10M pre to quantify dilution cost. Founders planning a Series A should target ownership above 50% after the round to retain control through later stages. Model down round scenarios where pre money drops below prior post money to see full dilution impact. Board seats and protective provisions are separate from percentage ownership but affect control. Compare founder percent before and after both new money and pool expansion: pool refresh alone dilutes without any cash in. Employee option pool refresh before Series B often dilutes founders ten to fifteen percent without new cash. Compare founder percent after Series A primary plus pool refresh versus primary round alone. Compare founder percent before and after both new money and pool expansion: pool refresh alone dilutes without any cash in. Employee option pool refresh before Series B often dilutes founders ten to fifteen percent without new cash. Compare founder percent after Series A primary plus pool refresh versus primary round alone.

expansion: pool refresh alone dilutes without any cash in. Employee option pool refresh before Series B often dilutes founders ten to fifteen percent without new cash. Compare founder percent after Series A primary plus pool refresh versus primary round alone. Compare founder percent before and after both new money and pool expansion: pool refresh alone dilutes without any cash in. Employee option pool refresh before Series B often dilutes founders ten to fifteen percent without new cash. Compare founder percent after Series A primary plus pool refresh versus primary round alone.

Use Equity Dilution Simulator whenever inputs change: after market moves, new contributions, or revised personal assumptions. Bookmark the page for quick reruns without installing software.

Example scenario for Equity Dilution Simulator: 50%. Enter those values above to reproduce the walkthrough described in How it works.

Adjust one input at a time to see sensitivity. Equity Dilution Simulator updates instantly so you can stress test optimistic and conservative assumptions before acting.

Reach for Equity Dilution Simulator when model vc round impact on founder ownership stakes.. It suits quick what if analysis before trades, allocation changes, or plan updates.

Pair with related tools when the decision spans taxes, liquidity, or multi year projections beyond what one formula captures.

Copying outputs without checking input units or stale market prices is a frequent error with Equity Dilution Simulator. Confirm tickers, percentages, and dates before acting.

Running a single baseline scenario ignores tail risks. Stress test with conservative inputs and compare against related tools listed below when the decision is material.

Starting from 100% founder ownership. Each round adds investor shares and reduces founder percentage. Does not model option pools, convertible notes, SAFE conversions, or anti dilution provisions. Use for scenario planning before fundraising. Full cap table software adds liquidation waterfalls and participating preferred math beyond this simulator. Assumes single round snapshot: pro rata participation rights let investors buy up and reduce dilution if exercised. Convertible note stacks require cap table software beyond single round calculator for accuracy. Weighted average anti dilution provisions in down rounds are not calculated in this simple ownership snapshot. SAFE stacks require cap table software beyond single round snapshot for accuracy. Assumes single round snapshot: pro rata participation rights let investors buy up and reduce dilution if exercised. Convertible note stacks require cap table software beyond single round calculator for accuracy. Weighted average anti dilution provisions in down rounds are not calculated in this simple ownership snapshot. SAFE stacks require cap table software beyond single round snapshot for accuracy. Equity Dilution Simulator does not replace personalized advice. Fees, slippage, account specific rules, and behavioral constraints may change real world outcomes.

ESO Value Calculator helps model employee equity alongside founder dilution. Use those calculators when equity dilution simulator alone does not capture the full decision.

Internal links on portfolios.tools help you chain calculators: run Equity Dilution Simulator first, then validate edge cases with a specialized tool from the related section below.