🔢 Compound Interest Calculator
See the power of compounding — interest earning interest — and how much more it delivers than simple interest over time.
Final Amount
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Compound Interest Earned₹0
Simple Interest (same rate/period)₹0
Extra Earned via Compounding₹0
Money Multiplied—
Formula: A = P(1 + r/m)^(m×t). Rule of 72: money doubles in roughly 72 ÷ rate years — at 10%, about 7.2 years. More frequent compounding earns slightly more. Estimates only.