Percentage Calculator Pro

Calculate percentages, percentage change, discounts and markups instantly. Four calculators in one fast, offline extension.

Percentage Calculator Pro combines four essential percentage calculators in one clean popup. Calculate percentages, reverse percentages, percentage change, and more without leaving your browser. Includes four calculators: 1. What is X% of Y — "What is 15% of 2,400?" → 360 2. X is what % of Y — "45 is what percent of 180?" → 25% 3. Percent change — "From 740 to 1,120?" → +51.35% 4. Add or subtract a percent — "899 plus 18%?" → 1,060.82 Perfect for • Discounts & shopping • Tax calculations • Business & finance • Sales & pricing • Students & teachers • Everyday percentage calculations Features ✓ Instant calculations while typing ✓ Four percentage calculators ✓ Copy results with one click ✓ Auto-copy mode ✓ Calculation history ✓ Keyboard shortcuts ✓ Adjustable decimal precision ✓ Light & Dark themes ✓ Works offline ✓ No tracking or data collection Results appear as you type, in every row at once. Each result has a copy button, or turn on auto-copy and the latest result is always on your clipboard. Also in the popup: your last ten calculations with one-click recall, adjustable decimal precision, keyboard-first navigation, and light, dark, and system themes. Works completely offline. No account. No ads. No tracking. No analytics. No internet connection required. Everything runs locally on your device, without leaving your Chrome browser. Whether you’re shopping, studying, working with GST, pricing products or analysing percentage changes, Percentage Calculator Pro gives you instant answers without leaving your browser. Fast. Offline. Private. Built by Cipher Dash — simple, fast productivity tools.