HomeFinanceCategoryFinanceCalculators for growth, savings, and loan repayment tasks with clear formulas and stated assumptions.01Simple Interestprincipal × rate × time→02Compound Interestgrowth with contributions→03APR to APYnominal ⇄ effective rate→04Future Valuewhat a deposit becomes→05Present Valuewhat a future sum is worth now→06CAGRannualized growth rate→07ROIreturn on an investment→08NPVcash flows, discounted→09IRRthe rate that zeroes NPV→10Inflationpurchasing power over time→11Savings Goalcontribution to hit a target→12Retirementnest egg vs. income needed→13Withdrawalhow long a balance lasts→14Loan Paymentpayment + amortization schedule→15Mortgagepayment, taxes, insurance, PMI→16Refinancebreak-even on closing costs→17Debt Payoffmonths and interest to clear→18Break-evenunits and revenue to cover cost→