Free Calculators & Tools
16 free calculators for everyday money and life questions — from your 2026 paycheck and state sales tax to mortgages and inflation. No sign-up, results update as you type.
Mortgage paymentMonthly payment with taxes, insurance & PMI
Auto loanCar payment with tax, fees & trade-in
Personal loanPayment & full amortization schedule
Credit card payoffMonths to debt-free & interest paid
Compound interestSavings growth with monthly deposits
401(k) & retirementBalance at retirement with match
Rent affordability30% rule and 28/36 rule
Paycheck estimator2026 federal tax, Social Security & Medicare
Sales tax by state2026 state rates + average local
Tip & bill splitTip and each person's share
Percentage% of, what %, and % change
Unit converterMiles/km, lb/kg, °F/°C, gal/L, in/cm
BMIAdult body mass index (CDC)
Age & date differenceExact age, days between dates
Hourly ↔ salaryConvert wage to yearly, monthly, weekly
InflationDollar value 1913–2026 (BLS CPI)Built on official numbers
Tax calculators use the 2026 figures published by the IRS and the Social Security Administration; sales tax rates come from the Tax Foundation (July 1, 2026); the inflation calculator uses BLS CPI-U data. Every result updates instantly as you type and nothing leaves your device.
Questions & answers
Are these calculators free?
Yes. Every calculator is free, needs no sign-up and runs entirely in your browser — nothing you type is sent to a server.
Where do the tax numbers come from?
Federal tax brackets, standard deductions, the 401(k) limits and the Additional Medicare Tax come from the IRS; the Social Security wage base from the Social Security Administration; state sales tax rates from the Tax Foundation's July 1, 2026 table; inflation from the Bureau of Labor Statistics CPI-U.
Are the results financial advice?
No. The calculators give estimates based on the numbers you enter and published rules. For decisions about loans, taxes or investments, confirm with your lender, a tax professional or the official source.