Compound Interest Calculator
Growth of a lump sum with yearly → daily compounding frequencies.
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About this calculator
Compound interest earns interest on interest. Over long horizons this snowball effect dominates — the difference between 6% and 10% over 25 years is not linear but exponential.
Einstein allegedly called compounding the eighth wonder of the world; whether he said it or not, the mathematics holds.
Formula
Frequently Asked Questions
What is the Rule of 72?
Divide 72 by the annual return rate to estimate doubling time. At 8% money doubles roughly every 9 years.
Why choose different compounding frequencies?
Banks quote rates with specific compounding conventions (FDs usually quarterly). Match the frequency to get accurate results.
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