Compound Interest Calculator
See how your investments grow with the power of compounding.
Final Amount
₹2,59,374.25
2.59× your investment
₹1,00,000
Principal Invested
₹1,59,374.25
Interest Earned
How it works
Enter your principal amount, annual interest rate, compounding frequency (daily, monthly, quarterly, or annually), and investment duration. The calculator shows your final amount and total interest earned using the compound interest formula A = P(1 + r/n)^(nt).
Why use this tool?
Investors, students, and financial planners use this tool to understand the power of compounding for savings accounts, FDs, mutual funds, and long-term investments. Albert Einstein called compound interest the eighth wonder of the world.
Frequently Asked Questions
What is compound interest?
Compound interest earns interest on both the principal and previously accumulated interest — unlike simple interest which only earns on the principal. Over time, this compounding effect dramatically accelerates growth.
How often does compounding matter?
More frequent compounding (daily vs. annually) produces slightly higher returns. For most savings and investment calculations, annual compounding gives a good approximation.
What is the Rule of 72?
Divide 72 by the annual interest rate to estimate how many years it takes for your money to double. At 8% annual return, your investment doubles in approximately 9 years (72 ÷ 8 = 9).
Is this free?
Yes, completely free. All calculations are instant and run in your browser.
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