Money

Compound Interest Calculator

Estimate how a starting balance grows when interest is added repeatedly.

Currency Starting amount

Currency sets the symbol and number format. Some currencies use a different number of decimal places, which can affect rounding.

Annual interest rate

Years

Compounding frequency

Estimated final balance

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Your future balance and interest earned will appear here after you calculate.

Money

How this result is calculated

The starting amount is multiplied by (1 + annual rate divided by compounding frequency) raised to the total number of compounding periods. Decimal arithmetic is used and money is rounded half-up to two decimal places.

Assumptions and limits

This estimate assumes a fixed nominal annual rate, no deposits or withdrawals, and no taxes, fees or changing rates. Currency is used only for display; no exchange-rate conversion is performed.