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Compound Interest Calculator

See how your money grows with the power of compounding

Final Amount
Total Interest
Total Invested
YearOpeningInterestContributionsClosing

What is Compound Interest?

Compound interest is interest calculated on both the initial principal and the interest that has been added over previous periods. Albert Einstein reportedly called it "the eighth wonder of the world." The formula is:

A = P × (1 + r/n)^(n×t)

Where P = Principal, r = Annual rate, n = Compounding frequency, t = Time in years.

Simple vs Compound Interest

Simple InterestCompound Interest
FormulaP × r × tP × (1 + r/n)^(n×t)
Interest onPrincipal onlyPrincipal + accumulated interest
GrowthLinearExponential
Best forShort-term loansLong-term investments