Compound Interest Calculator
See how your money grows over time with compound interest — including optional regular contributions.
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Everything you need to know
Why Compound Interest Is Kind of Magic
Here's the deal — compound interest means you earn interest on your interest. So your money doesn't just grow, it grows faster and faster over time. Einstein supposedly called it the eighth wonder of the world. Whether he actually said that or not, the math checks out.
Play With the Numbers
Try different compounding frequencies — annually, semi-annually, quarterly, or monthly — and see how they change your results. Spoiler: monthly compounding beats annual, but the difference isn't as dramatic as you'd think. What really moves the needle is starting early and contributing regularly.
The Yearly Breakdown
We give you a full year-by-year table showing exactly how your investment grows. It's surprisingly satisfying to watch those numbers climb, especially in the later years when compounding really kicks in.
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Planning monthly investments? Try the SIP Calculator or the Step-up SIP Calculator. Taking a loan instead? See your payments with the Loan EMI Calculator.