FinCalc is a free collection of 40 financial calculators covering personal finance, investing, business, and real estate — CAGR, EMI/loan, mortgage, DCF valuation, SIP, retirement/FIRE planning, tax estimation, debt payoff, and more. Everything runs entirely client-side in your browser. No signup, no paywall, no data collection — enter your numbers and get instant results, with a built-in guide and FAQ for each calculator. Built for anyone who wants quick answers without signing up to anything