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Financial · Calculator

Simple Interest Calculator

Calculate simple interest on a principal amount.

Simple Interest Calculator

Compute interest using the simple interest formula.

Formula

I = P × r × t

Step-by-step

  1. r = rate / 100
  2. I = P × r × t
  3. Total = P + I

Example

$1,000 at 5% for 3 years earns $150 interest.

FAQ

Simple vs compound interest?+

Simple interest is only on principal; compound includes earned interest.

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