Compound Interest Calculator

Calculate how your investments grow over time with compound interest

Initial Investment

Principal Amount

Interest Rate

Annual Interest Rate

Time Period

Investment Period

Compound Frequency

Interest Compounds

Regular Contributions

Additional Contribution

Contribution Timing

Contribute at

End of Period Beginning

Compound Interest Formula (Click to expand)

Basic Formula:

A = P(1 + r/n)^(nt)

A = Final amount
P = Principal (initial investment)
r = Annual interest rate (decimal)
n = Number of times interest compounds per year
t = Time in years

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Free compound interest calculator. Calculate investment growth with regular contributions. See year-by-year breakdown, effective annual rate, and doubling time. Plan your savings and retirement with accurate projections.

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