Compound Interest Calculator
Formula: A = P × (1 + r/n)^(nt). The 8th wonder of the world — the longer you stay invested, the more dramatic the effect.
Details
₹1,00,000
8.00%
10 yrs
Principal
₹1,00,000
Interest
₹1,15,892
Maturity
₹2,15,892
Frequently asked questions
What is compound interest?
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Compound interest earns interest on previously earned interest — the base keeps growing. Formula: A = P(1 + r/n)^(nt), where n is the compounding frequency per year.
Which frequency is best?
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More frequent compounding gives slightly higher returns. At 10% over 10 years, yearly gives ~2.59× and monthly gives ~2.71×. Most Indian FDs and savings accounts compound quarterly.
What is the rule of 72?
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A quick shortcut: money doubles in approximately 72 ÷ annual-return years. At 12% return, money doubles in 6 years; at 8% in 9 years.
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