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Simple Interest Calculator

Calculate simple interest: interest on the original amount only, with no compounding.

Your numbers

$
%
years

Interest

$1,500.00

Total
$11,500.00
Show the working
  1. $10,000.00 × 5% × 3 years = $1,500.00

Results are estimates for planning. Check important figures with a qualified professional.

Quick answer

The Simple Interest Calculator shows simple interest earned or owed on a principal over time. How it works: Interest = principal × rate × years. For example, with principal of $10000, annual rate of 5 %, and time of 3 years, the interest is $1,500.00.

How to use the Simple Interest Calculator

  1. Enter principal.
  2. Enter annual rate.
  3. Enter time.
  4. Read interest and the breakdown. Use Share to send the exact numbers, or Print to save a PDF.

How it's calculated

  • Interest = principal × rate × years

Worked example

With principal of $10000, annual rate of 5 %, and time of 3 years:

Interest: $1,500.00. Total: $11,500.00.

Questions people ask

Simple or compound?

Simple interest never earns interest on interest. Most savings accounts compound; use the compound interest calculator for those.