Percentage Calculator

A powerful percentage calculator with multiple calculation modes, history tracking, and customizable themes.

Percentage Calculator - Chrome Extension The fastest way to calculate percentages right in your browser - NO PERMISSIONS REQUIRED! What it does: This lightweight extension gives you instant access to five essential percentage calculations without leaving your current tab. Perfect for students, professionals, shoppers, and anyone who needs quick percentage math. Key Features: ZERO PERMISSIONS - Your data stays completely private and secure. This extension cannot access your browsing data, personal information, or any websites you visit. Five calculation modes in one place: - What is X% of Y? (discounts, tips, taxes) - X is what % of Y? (growth rates, completion) - Percentage change (before/after comparisons) - Increase/decrease by percentage (price changes) Smart bidirectional calculation - edit any field and others update automatically Works completely offline - no internet required after installation Optional history tracking with export/import Multiple number formats - US (1,234.56) and Euro (1.234,56) Dark/Light themes that follow your system preferences Adjustable precision - set decimal places from 0-10 Why choose this extension? Unlike online calculators that require internet and track your usage, this extension works entirely offline and respects your privacy. No data collection, no ads, NO PERMISSIONS NEEDED - just pure functionality when you need it. Perfect for quick calculations while shopping online, analyzing data in spreadsheets, calculating tips at restaurants, or working on homework. The compact popup design means it's always just one click away without disrupting your workflow. Install once, calculate forever - completely free and private.