Interest Calculator
Calculate simple interest: I = P × r × t. Enter principal, annual rate (%), and time in years.
Interest Calculator
Interest Amount
$400
How it works
Simple interest = principal × (rate/100) × years. No compounding.
Frequently asked questions
Simple interest is only on the principal. Compound interest adds interest on prior interest.
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<iframe src="https://smartcalculators.tools/embed/interest-calculator" title="Interest Calculator" width="100%" height="400" frameborder="0"></iframe>