# Simple Interest Calculator

> Calculate non-compounding interest, total value, and annual interest.

Page: https://askcalculators.com/calculator/simple-interest-calculator/
Definition: https://askcalculators.com/calculator/simple-interest-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/simple-interest-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/simple-interest-calculator/?principal=10000&annualRate=5&years=5

## Inputs
- principal: Principal; type=money; required; default=10000; min=0
- annualRate: Annual interest rate; type=percent; required; default=5; min=0; max=100
- years: Time; type=number; required; default=5; min=0; max=100

## Outputs
- totalAmount: Total amount; format=currency; primary
- interest: Total interest; format=currency
- annualInterest: Interest per year; format=currency

## Formula
Interest = principal × annual rate × years

The rate is divided by 100. Interest is not added back to the principal.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.