SnowballFi

The compound interest calculator that thinks like a professional investor.

Project your capital, analyse real returns and discover when your money will work for you - in seconds, without spreadsheets.

CALCULATE WITH PRECISION

Enter your initial capital, periodic contributions, annual interest rate and time horizon. snowballFi calculates in real time as you type, showing you exactly how your money grows over time.

Customisable compounding frequencies (daily, monthly, quarterly, annually) Annual contribution growth rate Lump sum or periodic contributions Side-by-side comparison: compound vs. simple interest RESULTS THAT GO BEYOND A NUMBER

Final capital and total interest earned ROI and CAGR automatically calculated Visual growth chart with contribution breakdown Inflation-adjusted real capital After-tax net return simulation ADVANCED KPIs - PREMIUM

Unlock the analytical power used by professional investors:

IRR (Internal Rate of Return) ROCE (Return on Capital Employed) Payback Period Yield on Cost Capital Multiplier Rule of 72 - time to double your money NPV (Net Present Value) Wealth Velocity FINANCIAL FREEDOM (FIRE) - PREMIUM

Find out exactly when you can stop working:

Target capital based on the 4% rule Crossover point - when passive income exceeds contributions Milestones at 25%, 50%, 75% and 100% of your goal Annual passive income projection DESIGNED FOR EVERYONE

No registration or account required All data stored locally on your device iPhone and iPad Available in 7 languages: English, Spanish, French, Italian, German, Portuguese and Hindi 10+ currencies supported FREE vs PREMIUM

The free version includes the full calculator, charts and basic KPIs. Premium unlocks all advanced KPIs and the Financial Freedom module, and removes ads permanently - with a single one-time payment. No subscription, ever.

snowballFi uses the standard nominal rate convention (rate/periods), consistent with Excel FV() and the HP 12C, ensuring results that match industry-standard financial calculators.