Simple Interest Calculator
Calculate simple interest, total amount and interest earned instantly. Enter principal, annual rate and time period to estimate loan or savings interest.
Interest Details
Results
Total Amount = Principal + Interest
| Period | Principal | Interest | Total Amount |
|---|
How to Use the Simple Interest Calculator
Calculate interest in three simple steps.
1. Enter principal
Add the original amount borrowed, invested or saved.
2. Add rate and time
Enter the annual interest rate and the time period.
3. View results
See total interest, final amount and period breakdown instantly.
Calculate interest without compounding.
This Simple Interest Calculator is useful for estimating interest on basic loans, savings, short-term lending, educational examples and fixed-rate interest scenarios.
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Simple Interest Calculator FAQ
Common questions about simple interest calculations.
What is simple interest?
Simple interest is interest calculated only on the original principal amount.
What is the simple interest formula?
The formula is Interest = Principal × Rate × Time. The rate is usually written as a decimal and time is usually measured in years.
Can I calculate interest for months or days?
Yes. This calculator converts months and days into years for the simple interest calculation.
Is this financial advice?
No. This calculator is for educational estimates only and should not be considered financial advice.