Finance calculator
Simple Interest Calculator
Calculate simple interest and total amount from principal, rate, and time.
i Enter rate × years as one value (e.g. 4% × 10 yr = 40).
Finance calculator
Simple Interest Calculator
Instant result
Result
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Enter values to calculate.
How to use
Follow these steps for a clear answer.
Enter the known values
Fill in the fields for your calculation.
Choose a mode if available
Use the tabs when multiple directions are offered.
Read the result
The result updates as you type.
Frequently asked questions
Key distinctions behind the calculation.
How does the Simple Interest calculation work?
It uses the formula I = P × r × t / 100.