EMI Loan Calculator
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Calculate your monthly EMI, total interest, and total payment for any loan with our advanced amortization-based calculator.
Compound Interest Calculator
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See how your investment grows with the power of compound interest. Supports yearly, monthly, daily compounding and recurring contributions.
Compound Interest Calculator
Final Balance
$0
About This Tool
The Power of Compound Interest
Albert Einstein reportedly called compound interest “the eighth wonder of the world.” It’s the process where the interest you earn itself earns interest in subsequent periods, creating exponential growth over long time horizons.
How to Use This Calculator
Enter your starting principal, annual interest rate, time horizon, compounding frequency, and any optional regular monthly contributions. The calculator shows your final balance, total contributions, and total interest earned.
Formula
A = P(1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) − 1) / (r/n)]Where P is principal, r is annual rate, n is compounding periods per year, t is years, and PMT is the periodic contribution.
Frequently Asked Questions
What's the difference between simple and compound interest?
Simple interest is calculated only on the original principal. Compound interest is calculated on the principal plus all accumulated interest from previous periods, leading to exponential growth.
Which compounding frequency is best?
More frequent compounding earns slightly more, but the difference between daily and monthly compounding over long periods is small. The much bigger drivers are the interest rate, time, and how much you contribute regularly.
Is this calculator suitable for stock returns?
It approximates average annual returns but doesn't model volatility, inflation, or taxes. For stocks, treat the rate as a long-term average (e.g. 7% real return for the S&P 500) and treat the result as an estimate.