Simple Interest Calculator

Calculate simple interest based on principal amount, interest rate, and time period.

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About Simple Interest

Simple interest is a method of calculating interest where the interest amount is calculated only on the initial principal. It does not take into account the accumulated interest of previous periods.

Formula

Simple Interest = Principal × Rate × Time

Where:

  • Principal is the initial amount of money
  • Rate is the interest rate per period (usually expressed as a percentage per year)
  • Time is the number of periods (usually in years)

Example

If you deposit $1,000 in a savings account with a simple interest rate of 5% per year, after 3 years you would earn:

Simple Interest = $1,000 × 5% × 3 = $150

Total amount after 3 years = $1,000 + $150 = $1,150

Applications

Simple interest is commonly used in:

  • Short-term loans and borrowings
  • Treasury bills and bonds
  • Some types of savings accounts
  • Car loans and personal loans

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