• Mortgage calculatorPITI, PMI, extra payments, amortization
• Property tax by state and ZIPEffective rates from Census data
• Car loan calculatorAuto payment with trade-in
• Personal loan calculatorPayment and total interest
• Compound interest calculatorSavings growth with monthly deposits
• Debt payoff calculatorHow long to pay off a card
• APR to APYEffective annual yield
• Tip calculatorTip and split the bill
• Percentage calculatorX% of Y, % change
• Sales tax calculatorAdd or remove tax
• Savings goal calculatorMonthly amount to reach a goal
• Rent affordability30% rule
• Simple interestP × r × t