Compound Interest Calculator
See the magic of compound interest. Understand how your money multiplies exponentially over time.
Calculate Compound Interest
Principal vs Interest
Growth Over Time
Multiple Frequencies
Calculate with monthly, quarterly, half-yearly, or yearly compounding.
Visual Growth Chart
See the exponential growth curve of compound interest.
8th Wonder of World
Einstein called it the 8th wonder — see why!
How to Use
Enter Principal
Set your initial investment amount.
Set Interest Rate
Choose annual interest rate.
Choose Frequency
Select compounding frequency.
See Magic
Watch your money grow exponentially.
The Formula
A = P × (1 + r/n)^(n×t)Frequently Asked Questions
What is compound interest?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. It makes your money grow exponentially.
How is it different from simple interest?
Simple interest is calculated only on the principal. Compound interest is calculated on principal + accumulated interest, leading to much faster growth.
Which compounding frequency is best?
More frequent compounding gives slightly better returns. Monthly compounding is better than yearly. However, the difference is small for most investments.