FinCalcKit — Free Financial Calculators for Real-Life Decisions

Pick a calculator below. Every tool runs entirely in your browser — nothing you enter is sent anywhere or stored.

Mortgage & Home

Payoff timelines, extra principal payments, and PMI removal dates.

See your real payoff date, total interest saved, and exactly when PMI drops off.

Combine a biweekly payment schedule with extra principal to see your accelerated payoff date.

Real out-the-door numbers, including trade-ins, rebates, and sales tax.

Enter your trade-in value, manufacturer rebate, and local tax rate to get your true monthly payment.

Compare strategies for paying off credit cards and loans faster.

Enter all your debts and any extra payment to compare both payoff strategies side by side.

See your front-end and back-end DTI, how lenders rate it, and your room before 36% or 43%.

Roth conversions, tax-bracket planning, and long-term retirement projections.

Find how much you can convert this year without spilling into the next tax bracket.