Simple Interest Calculator

Quickly calculate simple interest on any principal amount.

Simple Interest Calculator

Interest Earned
$1,500.00
Total Amount
$11,500.00

What is Simple Interest?

Simple interest is a straightforward way to calculate the interest charged or earned on a principal amount over a set period. Unlike compound interest, simple interest is calculated only on the original principal, not on accumulated interest. The formula is: I = P × R × T, where I is interest, P is principal, R is the annual interest rate, and T is time in years.

When is Simple Interest Used?

  • Short-term loans: Many personal and auto loans use simple interest.
  • Certificates of Deposit: Some CDs calculate interest simply.
  • Bonds: Many bonds pay simple interest (coupon payments).

Simple interest is easier to calculate and understand, making it ideal for short-term financial products. For long-term investments, compound interest is more common and results in higher returns.

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