Compound Interest Calculator
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yrs
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Maturity Value
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Principal Amount
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Interest Earned
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Estimated value based on the return rate entered. Actual returns may vary and are not guaranteed.
A compound interest calculator shows how a principal amount grows when interest is added not just to your original investment, but to the interest it has already earned.
Compounding frequency matters: interest that compounds monthly grows slightly faster than interest that compounds annually, even at the same stated annual rate, because interest starts earning interest sooner.
How This Calculator Works
The formula is A = P × (1 + r/n)n×t, where P is principal, r is the annual interest rate, n is the number of times interest compounds per year, and t is time in years.
Frequently Asked Questions
Why does compounding frequency change the result?
The more often interest is calculated and added back to your balance, the sooner that interest itself starts earning interest. Monthly compounding will always produce a slightly higher result than annual compounding at the same rate.
Is this the same as a fixed deposit calculator?
The underlying maths is the same. Our FD Calculator is tailored specifically to Indian bank fixed deposits, which typically compound quarterly.
What's a typical compounding frequency in India?
Bank fixed deposits usually compound quarterly. Savings accounts often compound quarterly too, though some compound daily on the balance and credit it quarterly.