How do I use the Compound Interest Calculator?

n is the number of compounding periods per year (12 = monthly, 365 = daily) Monthly contributions are added at the start of each month The earnings line separates principal + contributions from pure growth

Is the Compound Interest Calculator free and private?

Yes — it runs in your browser, requires no signup for basic use, and your data never leaves your device. The 'Rule of 72' is a shortcut: divide 72 by your annual rate to get doubling time. At 8% a year, money doubles every 9 years.

DevTools Surf

Compound Interest Calculator

Future value with configurable compounding + monthly contributions

1 credit

principal=… rate=% years=… n=12 contrib=monthly

Future Value

Related Calculators Tools

Basic Calculator Percentage Calculator Unit Converter Loan / EMI Calculator Number Formatter Tip Calculator BMI Calculator Mortgage Calculator