Interest Calculator
Calculate and compare simple vs. compound interest.
Your results will appear here
Enter your details to see the calculation.
The Power of Compounding
Albert Einstein reportedly called compound interest the "eighth wonder of the world." This calculator clearly demonstrates why, showing you how 'interest on your interest' can dramatically accelerate the growth of your savings or investments compared to simple interest.
How to Use the Interest Calculator
Enter Principal & Rate
Input your initial amount and the annual interest rate.
Set Time & Frequency
Enter the number of years and how often interest compounds.
Calculate & Compare
Instantly see the difference between simple and compound interest.
View the Growth
Explore the schedule to see how your balance grows year after year.
Common Use Cases
See how your savings account balance can grow over time with compound interest.
Project the future value of an investment and understand the power of compounding.
Calculate the total interest you might pay on a simple interest loan.
Visualize the difference between simple and compound interest to grasp a key financial concept.