Localization

Region & formats

Choose how NumLuma formats money, measurements, temperature, fuel economy, dates and time on this device.

Currency changes formatting only; NumLuma does not perform live FX conversion.
Try: “450k house 20% down 6.5”, “I owe 8k at 19% and pay 300”, “save 15k in 18 months”↑↓ navigate · Enter open
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NumLuma calculators

Money

Tools for loans, savings, interest and financial planning.

12 toolsFreeNo account
Start hereHigh-utility calculators for the most common money questions.
More money calculators7 more tools
Learn the numbers

Questions and formulas for money.

Move between the calculation, the worked question and the underlying formula without starting over.

Using these tools

Explore the math behind borrowing and saving.

Money calculators model interest, payments, growth and time using the values you enter. They are useful for comparison, but real products may add fees, taxes, insurance or changing rates.

  • Check whether rates are annual or monthly
  • Include fees outside the calculator when relevant
  • Use lender or institution quotes for final decisions