What Is a Simple Interest Calculator?
 

A simple interest calculator estimates the interest earned or owed on a principal amount over a set period using a fixed annual interest rate. Unlike compound interest, simple interest is calculated only on the original principal and does not include interest earned on previous interest.
 

Frequently Asked Questions
 

What is simple interest?

Simple interest is calculated only on the original amount of money borrowed or invested. It does not compound over time.
 

What is the formula for simple interest?

Where:

• I = Interest

• P = Principal (starting amount)

• r = Annual interest rate (decimal form)

• t = Time in years
   

What's the difference between simple and compound interest?

• Simple interest is calculated only on the original principal.

• Compound interest is calculated on both the principal and previously earned interest, allowing your money (or debt) to grow faster over time.
   

Where is simple interest commonly used?

Simple interest is often used for:

• Auto loans

• Some personal loans

• Short-term loans

• Basic savings calculations

• Educational examples