Percentage Calculator

Percentage Calculator is a free online tool to calculate percentages.

Calculate Interest Amount

How to Use

  • Enter the principal, interest rate, and time in years.
  • Click Calculate to get the interest and total amount.

Frequently Asked Questions

  • Q: What is interest?
    A: Interest is the cost of borrowing money, usually expressed as a percentage of the principal.
  • Q: What values are required?
    A: Principal, rate, and time are all required.
  • Q: Can the rate or time be negative?
    A: No, both should be 0 or greater, and principal/time must be greater than 0.

Calculation Basis

The interest and total are calculated as:
Interest = Principal × Rate × Time / 100
Total = Principal + Interest