All financial calculators
Every calculator below runs entirely in your browser — your numbers never leave your device. Each one includes the formula it uses and a plain-English guide.
Compound Interest Calculator
Project savings growth with compounding, monthly contributions, and a year-by-year chart.
Calculate now →Mortgage Calculator
Monthly payments with taxes, insurance, PMI and HOA, plus amortization schedule.
Calculate now →Refinance Calculator
Break-even month, monthly savings and total-interest comparison.
Calculate now →Credit Card Payoff Calculator
Debt snowball vs. avalanche payoff strategies compared side-by-side.
Calculate now →Retirement Calculator
Project your nest egg and sustainable monthly income with the 4% rule.
Calculate now →Investment Calculator
CAGR and inflation-adjusted returns with historical presets.
Calculate now →Income Tax Calculator
2026 federal + state tax and take-home pay breakdown.
Calculate now →ROI Calculator
ROI, annualized return, CAGR and payback period.
Calculate now →Profit Margin Calculator
Margin vs. markup, plus reverse pricing from a margin target.
Calculate now →