What does this compound interest calculator do?

It lets you solve for any one of four variables — principal, rate, time, or interest — using compound interest and your chosen compounding frequency.

When is compound interest used?

Compound interest is used in most UK savings accounts, investments, and loans, where interest is calculated on both the original amount and any accumulated interest.

Is this calculator free to use?

Yes. All Optimly calculators are completely free to use without registration.

OPTIMLY Calculators | Compound Interest Calculator

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Principal, rate and time inputs

Principal amount:

Interest rate, % per year:

Savings period: Years

Compound frequency: