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Free Finance Calculators

Use finance calculators to compare common money questions before you make a bigger decision. These tools help you test payments, rates, income, inflation, retirement targets, and savings assumptions in the browser, then read the matching guide when you need the formula explained.

Start with the money question

Finance searches usually start with a specific decision: payment size, interest cost, income, tax, or long-term savings. These paths put the most useful calculators one click away.

I am comparing home paymentsEstimate mortgage payment, interest, taxes, insurance, and loan balance assumptions.I need a loan paymentCheck payment, total interest, term, and rate scenarios before comparing real offers.I am checking payConvert hourly, weekly, monthly, and annual pay using work schedule assumptions.I am estimating taxTest taxable income, filing status, deductions, credits, and federal bracket assumptions.I want growth over timeModel principal, contributions, rate, compounding, and future value.
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Guides worth reading before a money decision

Finance tools can look exact, but small input changes can move the result a lot. These guides explain the assumptions before the number gets trusted too much.

Priority guides

Mortgage guidePayment, interest, taxes, insurance, PMI, HOA, and what the calculator leaves out.Loan guidePrincipal, rate, term, total interest, and why lender offers can still differ.Income tax guideFiling status, taxable income, deductions, credits, and estimate limits.Salary guideHourly, weekly, monthly, and annual pay conversions with gross-pay cautions.

Popular money calculations

Start with the calculator that matches the number you are checking, then read its assumptions before using the result in a real decision.

Useful shortcuts

Interest Rate CalculatorFind the rate hidden inside a fixed payment quote, then compare total interest and APR limits.Sales Tax CalculatorCalculate tax amount and final total from a before-tax price and local rate.Ad Revenue CalculatorEstimate pageviews, CTR, CPC, monthly revenue, and page RPM without treating it as a payout.Personal Loan CalculatorCompare payment, interest, term, APR-style fee cautions, and total cost assumptions.Currency conversion guideUse manual exchange rates, fees, inverse checks, and provider-rate warnings carefully.

What this category helps with

  • Loan, mortgage, interest, tax, salary, retirement, and investment estimates from clear assumptions.
  • Scenario comparison before you ask a lender, payroll provider, tax professional, or financial adviser.
  • Transparent warnings when a result is a planning estimate rather than a quote or recommendation.

Start with these tools

Mortgage CalculatorEstimate monthly principal, interest, taxes, insurance, PMI, and HOA costs.Loan CalculatorSolve for monthly payment, loan amount, interest rate, or payoff term for a fixed-rate loan.Auto Loan CalculatorEstimate a car payment from vehicle price, tax, fees, down payment, trade-in, rate, and term.Interest CalculatorCompare simple interest and compound interest from principal, annual rate, time, and deposits.Payment CalculatorEstimate a fixed loan payment from amount financed, rate, and term.Retirement CalculatorProject retirement savings from current balance, monthly contributions, and return.

All finance calculators

Open a tool, try the examples, then use the matching guide when you need more explanation.

Mortgage CalculatorEstimate monthly principal, interest, taxes, insurance, PMI, and HOA costs.
Loan CalculatorSolve for monthly payment, loan amount, interest rate, or payoff term for a fixed-rate loan.
Auto Loan CalculatorEstimate a car payment from vehicle price, tax, fees, down payment, trade-in, rate, and term.
Interest CalculatorCompare simple interest and compound interest from principal, annual rate, time, and deposits.
Payment CalculatorEstimate a fixed loan payment from amount financed, rate, and term.
Retirement CalculatorProject retirement savings from current balance, monthly contributions, and return.
Investment CalculatorProject investment growth from starting money, monthly deposits, return, and time.
Finance CalculatorProject a future balance from starting money, monthly deposits, rate, and time.
Income Tax CalculatorEstimate 2026 U.S. federal income tax from income, filing status, deduction, credits, and brackets.
Salary CalculatorConvert annual salary to monthly, biweekly, weekly, daily, and hourly pay.
Mortgage Payoff CalculatorEstimate early mortgage payoff time, interest saved, and months saved from extra principal payments.
401K CalculatorProject 401K growth from salary contributions, employer match, return, and time.
Savings CalculatorProject a savings goal from current balance, monthly deposits, rate, and time.
APY CalculatorEstimate annual percentage yield from a stated rate and compounding frequency.
Rent CalculatorEstimate how much rent may fit after income, debts, utilities, and a rent target.
Annuity CalculatorEstimate future value and present value for a fixed payment stream.
Pension CalculatorEstimate a defined-benefit pension from final salary, credited service, and plan multiplier.
Debt Payoff CalculatorCheck how fast a fixed debt can disappear when you pay the regular amount plus extra.
Repayment CalculatorEstimate payoff time, interest, total paid, and final payment for one fixed balance.
Student Loan CalculatorEstimate a standard student loan payment, interest, payoff time, and extra-payment savings.
CD CalculatorEstimate CD maturity value, interest earned, and early-withdrawal penalty what-if.
Bond CalculatorEstimate coupon income, current yield, and rough yield to maturity for a plain bond.
Roth IRA CalculatorProject Roth IRA growth before checking IRS contribution and income rules.
IRA CalculatorProject traditional or Roth IRA growth before checking IRS contribution and deduction rules.
VAT CalculatorAdd VAT to a net price or remove VAT from a gross price without mixing up the mode.
Auto Lease CalculatorEstimate a car lease payment by separating depreciation, finance charge, and tax.
Margin CalculatorCalculate profit, profit margin, and markup from selling price and cost.
Business Loan CalculatorEstimate a business loan payment, total interest, origination fee, cash received, and total cost.
Boat Loan CalculatorEstimate monthly boat loan payment, amount financed, sales tax, and interest.
Lease CalculatorEstimate a generic lease payment from asset value, residual, rate, term, fees, and upfront payment.
Refinance CalculatorCompare current loan payment with a new refinance payment and break-even estimate.
Budget CalculatorAdd monthly income, spending, debt, and savings to see leftover money and ratios.
Ad Revenue CalculatorEstimate website ad revenue from daily page views, CTR, CPC, monthly revenue, and page RPM.
Markup CalculatorCalculate selling price from markup or target margin, or check markup, margin, and profit from a known price.
Marriage Tax CalculatorCompare a simplified 2026 federal tax estimate for two single filers versus married filing jointly.
RMD CalculatorEstimate a required minimum distribution from prior Dec. 31 balance and age.
Real Estate CalculatorEstimate sale profit, net proceeds, ROI, and equity multiple from a property sale scenario.
Take-Home-Paycheck CalculatorEstimate take-home pay per paycheck from salary, pay schedule, pretax deductions, tax estimates, and 2026 employee FICA.
IRR CalculatorEstimate IRR from one starting outflow and five evenly spaced cash-flow periods.
ROI CalculatorCalculate simple ROI from starting cost, ending value, income, and costs.
APR CalculatorEstimate loan APR from amount borrowed, note rate, term, and upfront finance charges.
FHA Loan CalculatorEstimate an FHA-style mortgage payment with upfront MIP, monthly MIP, taxes, and insurance.
HELOC CalculatorEstimate HELOC interest-only payment, repayment payment, available equity, and CLTV.
Commission CalculatorEstimate commission, split amount, and total pay from sales, rate, base pay, and bonus.
Mortgage Calculator UKEstimate a UK repayment mortgage from property price, deposit, rate, term, and monthly fees.
Percent Off CalculatorCalculate sale price, savings, effective discount, and tax after one or two percent-off discounts.
GDP CalculatorEstimate gross domestic product with C + I + G + net exports, then check GDP per person.

Guides for this category

Each guide uses its matching tool, with example numbers and plain limits.