Simple Interest Calculator

Simple Interest (I)

$0.00

Total Amount (A)

$0.00

How Simple Interest is Calculated

Simple Interest (I) is the easiest way to calculate interest on a principal amount. It is based on the original principal amount, annual rate, and the duration of the loan or investment.

Simple Interest Formula

$$I = P \times R \times T$$

Where:

  • $\mathbf{I}$ is the **Simple Interest**
  • $\mathbf{P}$ is the **Principal Amount**
  • $\mathbf{R}$ is the **Annual Rate** (as a decimal, so 5% is 0.05)
  • $\mathbf{T}$ is the **Time** in years

Total Amount Formula

$$A = P + I$$

The Total Amount (A) is the original Principal plus the calculated Simple Interest.