# Percentage Calculator

Every common percentage question in one place.

URL: https://shortformkit.com/percentage-calculator/
Updated: 2026-10-13

Enter two values and read all three answers. Percent change is positive for an increase and negative for a decrease.

**Formula:** A % of B = A × B ÷ 100. Change = (B − A) ÷ A × 100

Results are estimates for general information, not medical or financial advice.

## How it works

1. **Enter your values** The result updates as you type.
2. **Switch units if needed** Metric or US units, where it applies.
3. **Read the result** Nothing is stored or sent anywhere.

## FAQ

**Is it free?**
Yes. No account, no limits.

**Is my data stored?**
No. The calculation happens in your browser and nothing is sent to a server.


Source: Shortform Kit (https://shortformkit.com/percentage-calculator/). Free, no login.