Simple Interest Calculator
Calculate simple interest and final amount over time.
Final amount
$11,500.00
- Simple interest
- $1,500.00
- Principal
- $10,000.00
Results are estimates for informational purposes only and are not financial advice.
What this calculator does
Estimate interest calculated only on the original principal.
Inputs and what they mean
- Principal
- — number value.
- Annual interest rate
- — number value.
- Duration
- — number value.
How to use it
- Enter the values for your estimate.
- Adjust the rate, duration, and optional scenario inputs.
- Review the totals, comparison, chart, and schedule where available.
Formula
Simple interest = principal × annual rate × time. Final amount = principal + interest.
Worked example
$10,000 at 5% for 3 years
Simple interest is $1,500 and final amount is $11,500.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
Results are estimates for informational purposes only and are not financial advice.
Common questions
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