Simple Interest Calculator Online

Last updated on by Editorial Staff

Simple Interest Calculator

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Quick Guide to Use the Calculator

  • Enter the principal amount in the “Principal Amount” input field. 
  • Adjust the “Annual Interest Rate (%)” using either the slider or input field.
  • Select the time period unit (Days, Weeks, Months, Years) from the dropdown menu.
  • Adjust the “Time” using either the slider or input field.
  • Click the “Calculate Interest” button to get the simple interest and total amount.
  • Reset the calculator using the “Reset” button for a new calculation.


Interest = (principal * rate * time) / 100

total amount = Principle amount + Interest amount

What is the Simple Interest Calculator?

The Simple Interest Calculator is a financial tool designed to quickly calculate the simple interest and total amount based on user-provided values such as principal amount, annual interest rate, and time.

Who Can Use This Calculator?

This calculator is useful for individuals, students, financial professionals, and anyone who needs to calculate simple interest for loans or investments.

Which Industries Can Use This Calculator?

Industries related to finance, banking, education, and personal financial planning can benefit from this calculator.

Benefits of Using This Calculator

  • Quick and accurate calculation of simple interest.
  • User-friendly interface with sliders and input fields.
  • Visual representation with a donut chart for better understanding.


How does the calculator handle different time units?

The calculator internally converts all time units to years for consistent calculations.

Can I use this calculator for any currency?

Yes, you can select your preferred currency from the dropdown menu.