Free financial calculators & APIs
Calculators you
can trust.
Accurate, no-signup calculators for the money decisions that matter. Every tool is also available as a clean, documented API.
The fleet
4 tools- mortgageMortgage Overpayment Calculator with Amortization ScheduleSee exactly how much interest and time you save by overpaying your mortgage. Instant amortization schedule, no signup, plus a clear breakdown of months saved.
- debtDebt Payoff Calculator: Avalanche vs SnowballCompare the avalanche and snowball debt payoff strategies side by side. See how much interest you save and how many months sooner you'll be debt-free.
- freelanceFreelance Hourly Rate CalculatorCalculate your freelance hourly rate accounting for taxes, business expenses, and a profit margin. Find out exactly what to charge to hit your income goal.
- savingsCompound Interest Calculator with Monthly ContributionsCalculate compound interest with monthly contributions. See your balance grow year by year and discover exactly how much of your final balance is pure interest.