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Finance Calculators

Browse 15 free finance calculators with transparent formulas, worked examples, assumptions, and cited sources.

Finance

30 calculators

  1. CD Interest CalculatorUse this CD rate calculator to estimate interest and maturity value from a quoted APY or nominal rate.
  2. Credit Card Payoff CalculatorEstimate payoff time and interest for a fixed payment or a modeled percentage-or-floor minimum payment, with optional extra payments.
  3. Mortgage Recast CalculatorEstimate a new principal-and-interest payment after a lump-sum mortgage recast.
  4. Prorated Rent CalculatorEstimate partial-month rent using actual calendar days, a fixed 30-day month, or annual daily rent with leap-year handling.
  5. High-Yield Savings CalculatorProject savings from APY and signed monthly cash flow, with deposits or withdrawals timed at the beginning or end of each month.
  6. 401(k) CalculatorProject 401(k) savings with 2026 regular and age-based contribution limits, employer match, and monthly cash flows.
  7. Roth 401(k) CalculatorProject separate Roth and Traditional 401(k) tax buckets, employer treatment, catch-ups, and estimated after-tax value.
  8. 403(b) CalculatorProject 403(b) regular deferrals, entered 15-year-service catch-up, age catch-up, employer contributions, and growth.
  9. TSP CalculatorProject TSP savings with employee deferrals, age-based catch-up, standard automatic and matching contributions, and monthly growth.
  10. Coast FIRE CalculatorEstimate the invested balance needed today to reach a future retirement target without new contributions.
  11. Future Value CalculatorProject future value from an initial balance and signed monthly deposits or withdrawals at the beginning or end of each month.
  12. Dividend CalculatorEstimate dividend income, yield, ending shares, and position value with optional DRIP and dividend-payment frequency.
  13. 529 Plan CalculatorProject 529 education savings from current balance, contributions, growth, costs, and inflation.
  14. APR CalculatorEstimate loan APR from amount financed, prepaid fees, equal monthly payment, and term.
  15. Savings Duration CalculatorEstimate how long a savings balance can support recurring withdrawals under a return and inflation scenario.
  16. Hourly To Annual Salary CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  17. Annual Salary CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  18. Annual Income CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  19. APY CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  20. Call Put Option CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  21. CPC CPM CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  22. Roth Ira CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  23. New Jersey Sales Tax CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  24. Ohio Sales Tax CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  25. CAGR CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  26. Salary With Overtime CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  27. Contribution Margin CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  28. WACC CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  29. Money Counter CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.
  30. Monthly Income CalculatorFree calculator with validated inputs, a stated calculation method, a worked example, and reference links.