Financial calculators
Know the number before you decide
Free tools for the arithmetic behind a mortgage, a lease, a paycheck and a stack of debt. Every formula is written out, every assumption belongs to you, and no page tells you what to do with the result.
- calculators
- 6
- guides with the working shown
- 18
- languages
- 10
- sign-ups to use any of it
- 0
The calculators
Six questions, six sets of numbers
HomeMortgage Payment CalculatorMonthly principal and interest, the full payment with tax and insurance (PITI), the amortization schedule and the effect of extra payments.HomeRent vs Buy CalculatorMonthly cost, upfront outlay, equity build-up and the crossover month.InvestingCompound Interest CalculatorBalance, contributions, interest earned and the inflation-adjusted value.PayTake-Home Pay CalculatorWhat a wage becomes after federal tax, payroll tax and state tax.PayFederal Income Tax CalculatorFederal and state income tax on a year of earnings, with both rates shown.DebtDebt Payoff CalculatorPay off several debts at once and compare the order.
Every figure shows its work
- The formula sits next to the answer, in plain language and in symbols.
- Every number that comes from somewhere carries its source and its date.
- Every tool states what it does not do, in the same words, right under the result.
Monthly payment
$2,555.44
Principal & interest
$2,275.44
Property tax
$280.00
Total interest
$459,158