Financial Calculators
Last updated: September 2026
Mortgage Payment Calculator
Estimate the full monthly cost of owning a home — principal, interest, property tax, and homeowner's insurance — bundled into the single number lenders call PITI.
Debt Payoff Calculator
Calculate how many months it takes to pay off a debt given its balance, APR, minimum payment, any extra monthly payment, and whether you keep the payment fixed or raise it each year.
Investment Return Calculator
Calculate the annualized rate of return on an investment given its initial cost, additional contributions, final value, dividends received, and holding period.
Tax Withholding Calculator
Estimate how much federal income tax should be withheld each month under the current (2020 and later) Form W-4, using 2026 tax brackets and standard deductions, your filing status, dependent credits, extra deductions, and any extra withholding you request.
Mortgage Affordability Calculator
Estimate the maximum home price you can afford given your annual income, existing monthly debt payments, down payment, and mortgage rate, applying the traditional 28/36 debt-to-income rule to a 30-year fixed loan.
Emergency Fund Calculator
Calculate how many months it takes to reach your emergency-fund goal given your essential monthly expenses, target months of coverage, current savings, monthly contribution, and a small interest rate on the parked cash.
Currency Exchange Calculator
Convert an amount from one currency to another using a specified exchange rate.
Internal Rate of Return (IRR) Calculator
Find the annualized return that makes a project's net present value zero, assuming equal annual cash flows.
Future Value Calculator
Project what a lump sum plus regular yearly contributions will grow to at a given rate of return.
Discount Percentage Calculator
Work out what percentage discount you are actually getting when a retailer advertises a dollar saving rather than a percentage off.
Auto Loan Calculator
Calculate the monthly payment on a car loan, factoring in sales tax, down payment, and a trade-in.
Net Worth Calculator
Calculate your net worth by adding up all your assets — cash, investments, property, vehicles — and subtracting all your debts.
Business Loan Calculator
Calculate the monthly payment on a business loan, including any origination fee rolled into the amount financed.
Simple Interest Calculator
Compute interest on a principal amount using the simple interest formula I = P × r × t.
Effective Annual Rate (EAR) Calculator
Convert a stated nominal interest rate into the true annual rate once compounding is included.
Treynor Ratio Calculator
Measure a portfolio's excess return per unit of market (systematic) risk, using beta instead of total volatility.
APR Calculator
Compute the effective annual percentage rate on a fixed-payment loan, including origination fees.
401(k) Retirement Calculator
Projects your 401(k) balance at retirement by combining your current balance, salary contributions, and employer matching, compounded over time.
Sortino Ratio Calculator
Measure a portfolio's return per unit of harmful downside risk, ignoring upside volatility.
Doubling Time Calculator
Find how many years it takes an investment to double at a given rate and compounding frequency.
Boat Loan Calculator
Compute the monthly payment on a boat loan given loan amount, annual rate, and term in years.
VAT Calculator
Compute the value-added tax (VAT) amount and gross price from a net price and VAT rate.
Compound Interest Calculator
Project the future value of an investment given a lump-sum principal, recurring monthly contributions, an annual rate, and a compounding frequency.
Loan Payment Calculator
Compute the periodic payment for a fully amortising fixed-rate loan from the principal, annual interest rate, term in years, and payment frequency.
Retirement Savings Calculator
Projects the total nest egg you'll have at retirement based on your current savings, monthly contributions, and an expected annual return (7% if left blank).
Savings Goal Calculator
Calculate the monthly amount you must save to reach a specific goal by a deadline, accounting for interest earned and inflation eroding the target.
Tax Bracket Calculator
Identifies your top marginal federal income tax bracket — the rate that applies to your next dollar of taxable income — based on 2026 IRS bracket thresholds and your filing status.
Break Even Point Calculator
Calculate the number of units you must sell to cover all fixed and variable costs, returning the exact break-even unit count for any product or business model.
Loan Amortization Calculator
Calculate the periodic payment on an amortizing loan given the principal, annual interest rate, term in years, and payment frequency.
Business Valuation Calculator
Estimate a business's market value using a blended approach combining revenue multiples and net income projections.
CD Calculator (Certificate of Deposit)
Compute the maturity value of a bank certificate of deposit (CD), given deposit amount, APY, and term.