Interactive calculators for startup founders. No signup, no paywall, no email required. Just open and calculate.
Used by founders preparing for pre-seed, seed, and Series A fundraising.
A dilution calculator one click away — model funding rounds without leaving the page. Free, no permissions, all math runs in your browser.
Get your equity score in 60 seconds. Find out if your equity deal is fair compared to industry benchmarks for founders at your stage and role.
Calculate Your Score →Complete evaluation checklist for founders and employees. 34 checkpoints covering grants, vesting, taxes, dilution, exit scenarios, red flags, and negotiation.
Open Checklist →Estimate taxes on your startup equity. Compare ISO vs NSO tax, calculate AMT liability, decide on 83(b) election, and see your exact tax bill at exercise and sale.
Try the Tax Calculator →Watch your equity disappear across funding rounds. See exactly how much you lose at each round from pre-seed through Series C. Shocking visual timeline with dollar impact.
Try the Timeline →See how your ownership percentage changes across pre-seed, seed, Series A, B, and C funding rounds. Visual stacked bar charts and detailed cap tables.
Open Calculator →Figure out a fair equity split based on each founder's contributions: idea, technical skills, business expertise, time commitment, and capital invested.
Open Calculator →Model Y Combinator SAFE note conversions. Compare pre-money and post-money SAFEs, see conversion prices, and understand dilution impact.
Open Calculator →Calculate how many months of runway you have left. Visualize your cash burn rate, project when you'll run out, and model hiring plans.
Open Calculator →Build a complete cap table with founders, investors, option pool, and convertible notes. Track ownership percentages and share counts across rounds.
Open Calculator →Visualize your equity vesting schedule with cliff periods, monthly vesting, and acceleration. See how much equity you've earned at any point in time.
Open Calculator →Calculate Customer Acquisition Cost, Lifetime Value, and LTV:CAC ratio. Understand whether your SaaS business model is fundamentally sound.
Open Calculator →Estimate your startup's pre-money valuation using 3 proven methods: Berkus (pre-revenue), Scorecard (early stage), and Venture Capital (fundraising).
Open Calculator →Calculate what your startup stock options are really worth. See exit scenarios, vesting progress, and ISO vs NSO tax estimates in one place.
Open Calculator →Side-by-side comparison of two startup job offers. Input salary, options, strike price, vesting, and valuation — see which offer wins at every exit scenario.
Open Comparison Tool →Compare two startup offers with different salary and equity mixes. See the break-even exit point where equity makes up for the salary difference.
Open Calculator →Model convertible note conversion at a priced round. See how interest, cap, discount, and maturity affect your equity.
Open Calculator →Model exit waterfall payouts with liquidation preferences. Compare 1x, 2x, participating preferred, and understand who gets paid first.
Open Calculator →34 checkpoints to evaluate any equity offer. Grants, vesting, taxes, dilution, exits, and negotiation.
Complete guide to understanding dilution across funding rounds.
Everything founders need to know about YC SAFE notes.
How multiple SAFEs convert with waterfall examples and ownership impact.
Step-by-step guide to understanding your startup's runway.
Understand 4-year vesting, cliffs, and acceleration.
How to build and maintain a clean cap table.
Quick reference formulas for dilution, vesting, SAFE notes, and more.
Free widgets for accelerators, blogs, and startup communities.
Common questions about startup equity, dilution, and financing.
See exactly how much equity you'll keep after pre-seed, seed, Series A, and beyond. Includes dilution charts, exit scenarios, and actionable recommendations.
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