# CALCULATOR TOOLS — Online's Tool
URL: https://onlinestool.com/calculator-tools
Interactive Web: https://onlinestool.com/calculator-tools

## Overview
This topic cluster contains privacy-focused utilities designed to run directly in your browser.

## Included Tools
- **[percentage-calculator](https://onlinestool.com/tools/percentage-calculator)** ([Markdown](https://onlinestool.com/tools/percentage-calculator.md)): percentage-calculator
- **[cd-calculator](https://onlinestool.com/tools/cd-calculator)** ([Markdown](https://onlinestool.com/tools/cd-calculator.md)): cd-calculator
- **[time-and-a-half-calculator](https://onlinestool.com/tools/time-and-a-half-calculator)** ([Markdown](https://onlinestool.com/tools/time-and-a-half-calculator.md)): time-and-a-half-calculator
- **[bmi-calculator](https://onlinestool.com/tools/bmi-calculator)** ([Markdown](https://onlinestool.com/tools/bmi-calculator.md)): bmi-calculator
- **[cat-age-calculator](https://onlinestool.com/tools/cat-age-calculator)** ([Markdown](https://onlinestool.com/tools/cat-age-calculator.md)): cat-age-calculator

## Privacy Architecture
All tools in this cluster execute client-side in the browser using HTML5 and JavaScript APIs. Zero data is transmitted to remote servers.