Free Online Compound Interest Calculator
See how your savings or investments grow over time with compound interest. Adjust principal, rate, compounding frequency, and contributions to plan your financial future.
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How to Use the Compound Interest Calculator
1
Enter the initial investment (principal).
2
Enter the annual interest rate.
3
Set the compounding frequency and time period.
4
Optionally add regular contributions.
5
View the projected balance and interest earned.
Frequently Asked Questions
What is compound interest?
Compound interest is interest earned on both the initial principal and the accumulated interest from previous periods. It makes your money grow faster over time.
What compounding frequencies are available?
Annual, semi-annual, quarterly, monthly, and daily compounding options are available.
Can I include regular contributions?
Yes. Add monthly or annual contributions to see how regular saving affects your total balance.