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Compound Interest Calculator

Calculate how your investment grows over time with compound interest. See projections for any principal amount, interest rate, and compounding frequency.

How to Use Compound Interest Calculator

Enter your principal amount

Input your starting investment or savings balance.

Set rate and time period

Enter the annual interest rate, compounding frequency, and number of years.

See your growth projection

View the final balance and a year-by-year breakdown of your investment growth.

Frequently Asked Questions

What is compound interest?▼

Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods, causing your money to grow exponentially over time.

How often does compound interest accrue?▼

Interest can compound daily, monthly, quarterly, or annually. More frequent compounding results in slightly higher returns.

What is the difference between compound and simple interest?▼

Simple interest is calculated only on the principal. Compound interest is calculated on the principal plus all previously earned interest, leading to much higher long-term growth.

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