📊 Compound Interest Calculator — Free (with Contributions)

Watch compounding work — with contributions and a yearly table. Free, no signup.

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Final amount
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Total invested
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Interest earned
InvestedInterest

Yearly growth

YearContributedInterestBalance

FAQ

What is the compound interest formula?

A = P(1 + r/n)^(nt) — principal grows on both the original amount and accumulated interest.

Does compounding frequency matter?

Yes — monthly compounding beats yearly at the same rate, though the difference is small.

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