Calculate compound interest with any compounding frequency. See your investment grow year by year.
Albert Einstein reportedly called compound interest "the eighth wonder of the world". Whether or not he actually said it, the sentiment is accurate — compound interest is the most powerful force in personal finance. Understanding it is essential for making smart savings and investment decisions.
A = P × (1 + r/n)^(n×t)
Where: A = Final amount, P = Principal, r = Annual interest rate (as decimal), n = Compounding frequency per year, t = Time in years.
The more frequently interest is compounded, the more you earn. Here's how ₹10,000 at 10% for 5 years grows differently:
A simple mental math trick: divide 72 by the annual interest rate to find how many years it takes to double your money. At 8% per year: 72 ÷ 8 = 9 years to double. At 12%: 72 ÷ 12 = 6 years.