Compound interest formula?

A = P × (1 + r/n)^(n×t) where n is the number of compounding periods per year.

How does compounding frequency matter?

More frequent compounding (monthly vs yearly) gives slightly higher returns. Daily compounding maximises growth for a given annual rate.

Years to double your money ≈ 72 ÷ annual return %. At 12%, money roughly doubles every 6 years.

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See the magic of compounding over time.

Reviewed by Nisha SLast verified 6 Sept 2026RBI-compliantFact-check policy

Principal₹1,00,000

₹1K₹10Cr

Rate %10.0%

1%30%

Tenure (yrs)10 yrs

140

Compounds / year4

112

Interest₹1,68,506

Maturity₹2,68,506

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Compound interest reinvests interest each period — money grows much faster than simple interest.

A = P × (1 + r/n)^(n×t)

Everything you need to know about the Compound Interest Calculator.

Results are illustrative estimates for planning. Actual figures depend on bank/AMC terms, taxes and market conditions.