Compound Interest Calculator
Calculate how your money grows with compound interest. Enter principal, interest rate, compounding frequency, and time to see the power of compounding.
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Compound Interest Calculator
FinanceFree · No signup
Initial Balance
₹10,000
Total Interest
+₹12,196.4
Final Future Value
₹22,196.4
💡 Enter principal, interest rate, and duration to calculate compound interest.
Guide
How to Use Compound Interest Calculator
Enter Principal
Input your initial investment or deposit amount.
Set Interest Rate
Enter the annual interest rate percentage.
Choose Compounding Frequency
Select how often interest compounds: daily, monthly, quarterly, or annually.
Set Time Period
Enter the investment duration in years to see the final amount.
Frequently Asked Questions
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Unlike simple interest, it makes your money grow exponentially over time.
A = P(1 + r/n)^(nt), where A = final amount, P = principal, r = annual rate (decimal), n = compounds per year, t = years.
The more frequently interest compounds, the more you earn. Daily compounding gives slightly more than monthly, which gives more than annual. The difference matters most over long periods.
The Rule of 72 estimates how long it takes to double your money. Simply divide 72 by the interest rate. At 8% annual return, money doubles in 72/8 = 9 years.
For borrowers (loans, credit cards), compound interest works against you — debt grows faster. For investors and savers, it's highly beneficial as your wealth grows exponentially.