Free Online Compound Interest Calculator
Calculate how your investment grows with compound interest over time. Enter the principal amount, annual interest rate, time period, and compounding frequency (annually, semi-annually, quarterly, monthly, or daily) to see the maturity amount and total interest earned. The calculator demonstrates the power of compounding — how earning interest on interest accelerates wealth growth compared to simple interest.
Invested amount
₹1,00,000
Est. interest
₹1,21,964
Future value
₹2,21,964
Common questions
What is the compound interest formula?
A = P(1 + r/n)^(nt), where A is the maturity amount, P is the principal, r is the annual interest rate (as decimal), n is the number of times interest is compounded per year, and t is the time in years.
How does compounding frequency affect returns?
More frequent compounding produces slightly higher returns. For example, ₹1,00,000 at 10% for 10 years yields: ₹2,59,374 (annually), ₹2,65,330 (quarterly), ₹2,70,704 (monthly). The difference grows with higher rates and longer durations.