Interest Calculator — Free Online Tool
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Interest Calculator

Calculate simple interest earned or owed and total final amounts

Simple Interest Formula: $\text{Interest} = P \times r \times t$, where $P$ is principal, $r$ is annual rate, and $t$ is time in years (months / 12). Enter your details below.
Interest Parameters Input

Calculation Results

⚠️ Simple interest is calculated solely on the initial principal amount, unlike compound interest which earns interest on accumulated interest!

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