Summary
Simple interest grows linearly with principal, rate, and time.
Calculation details
Interest equals principal times rate times years. No compounding is applied.
Formula
Interest = P × r × t; Total = P + interest.
Worked example
$5,000 at 4% for 3 years
Interest is $600 and the total amount is $5,600.
How it works
Enter principal, annual rate, and years.
Frequently asked questions
What does this simple-interest calculation estimate include?
It applies simple interest only; compounding is excluded.
When is this simple-interest calculation most useful?
When you need a quick non-compounding interest estimate for short notes or teaching examples.
Are displayed values rounded?
The formula keeps full numeric precision. Values are rounded only when formatted for display.
Can actual results differ?
Yes. Banks may compound, day-count conventions differ, and fees can change the true cost.