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Alona Tool – Free Online Tools

Simple Interest Calculator

Runs in Your Browser

Calculate simple interest and the total amount from a principal, an annual rate and a number of years.

Browser-based: this tool works on your device and does not send your input to an Alona Tool server. See the Privacy Policy for details.
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Example Usage & Test Cases

Fixed deposit
Input Scenario:
Principal 10,000, 6% per year, 3 years
Generated Result:
Interest 1,800, total 11,800

How It Works

1

Enter the principal amount.

2

Enter the annual interest rate and the number of years.

3

Read the interest earned and total amount.

Frequently Asked Questions

Compound interest adds earned interest to the balance so it earns interest too. Use the Compound Interest Calculator for that.

Good to Know

Common uses

  • Checking basic loan or deposit terms
  • Learning how interest is calculated

Limitations and notes

  • No compounding, fees or taxes.
  • Real products may compute interest differently; check your agreement.

Results are general estimates and are not professional financial, tax, legal or medical advice. See the Disclaimer.

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Free Online Simple Interest Calculator

Simple interest is calculated only on the original amount: principal × rate × years ÷ 100. It does not compound.

Key Highlights:

  • Free to use, no signup
  • Instant results
  • Processed in your browser
  • Works on mobile and desktop