How do I use the Simple Interest Calculator?
Enter your values in the fields and the result updates instantly as you type.
Simple Interest Calculator
Calculate simple interest on a principal amount.
e.g., 1000 (in your currency)
e.g., 5 for 5%
Time in years
Results
Interest
100
Total amount
1,100
Formula: Interest = P * r * t
Frequently asked questions
What formula does this calculator use?
Interest = P * r * t
Can I use decimal values?
Yes. Decimal inputs are supported for most calculators. Integer-based tools use rounded integer values where appropriate.
Is this calculator free?
Yes. CalcuNimble calculators are free and optimized for fast everyday use.