Finance calculators
Loans, savings, CDs, home equity and refinancing — see the real numbers before you sign.
22 calculators, each with the formula, a worked example and sources.
- 401(k) CalculatorYour 401(k) balance at retirement, with employer match and 2026 IRS limits.
- Amortization CalculatorFull amortization schedule, plus how much extra payments save.
- Annuity CalculatorThe payment a lump sum supports, or what regular payments grow to.
- Auto Loan CalculatorMonthly car payment with trade-in, sales tax, fees and total interest.
- CD CalculatorHow much a certificate of deposit earns by maturity.
- Compound Interest CalculatorHow money grows with compound interest and regular contributions.
- Credit Card Payoff CalculatorHow long a card balance takes to pay off, or the payment to clear it by a date.
- Debt Payoff CalculatorPlan to clear several debts, comparing the avalanche and snowball methods.
- HELOC CalculatorHow much you can borrow against your home, and what it will cost.
- How Much House Can I Afford?The home price your income supports under the 28/36 debt-to-income rule.
- Inflation CalculatorWhat an amount from one year is worth in another, using official CPI data.
- Investment CalculatorWhat your investments could grow to, in future and today's dollars.
- Loan CalculatorMonthly payment, total interest and total cost for any fixed-rate loan.
- Mortgage CalculatorYour full monthly house payment: principal, interest, taxes, insurance, PMI and HOA.
- Present Value CalculatorWhat a future amount or a stream of payments is worth today.
- Refinance CalculatorWhether refinancing saves money, and when it breaks even.
- Rent vs Buy CalculatorCompare the net cost of renting and buying, and the year buying starts to win.
- Retirement CalculatorWhether your savings will cover the retirement income you want.
- Roth IRA CalculatorHow much your Roth IRA could grow, tax-free, by retirement.
- Savings CalculatorHow your savings grow with regular deposits and interest.
- Simple Interest CalculatorInterest and total amount using I = P × r × t, in years, months or days.
- Student Loan CalculatorMonthly student loan payment, and how much paying extra saves.