Interest Calculator

Calculate simple or compound interest earned on savings, investments, or loans over time.

Principal Amount ($)

Annual Interest Rate (%)

Time Period

Compounding Frequency

Simple Interest:

A = P(1 + rt)

Compound Interest:

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

Where: A = Final amount, P = Principal, r = Annual rate, t = Time in years, n = Compounding frequency