# Interest Rate Calculator

> Calculate the required annual interest rate to earn a specific amount of interest.

Page: https://askcalculators.com/calculator/interest-rate-calculator/
Definition: https://askcalculators.com/calculator/interest-rate-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/interest-rate-calculator/schema.json
Version: 7.0.0
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/interest-rate-calculator/?principal=10000&totalInterest=2000&time=4

## Inputs
- principal: Principal Amount ($); type=number; optional; default=10000
- totalInterest: Total Interest Earned ($); type=number; optional; default=2000
- time: Time Period (Years); type=number; optional; default=4

## Outputs
- result: Result; format=text; primary

## Formula
Simple annual interest rate = total interest ÷ (principal × years) × 100.

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