Solve core percentage math fast, apply practical tax/tip/discount actions, and use advanced reverse, compound, and parser workflows.
Formula: ((New Value - Old Value) / Old Value) × 100. A positive result is an increase; a negative result is a decrease.
Convert percentage to decimal (divide by 100) and multiply by Y. Example: 20% of 50 = 0.20 × 50 = 10.
Use Practical mode for tax, tip, and discount workflows with quick actions. Use Advanced mode for reverse/compound percentage logic and natural-language parser questions.
Yes! In guest mode, you can export your calculations to JSON format. Sign in is required for PDF and CSV export. Click the export button to download your results. This is perfect for record-keeping, sharing with others, or importing into other tools.
Yes! Your calculation history is automatically saved. Guest users can save up to 50 calculations per workspace locally. Sign in for free to save up to 100 calculations per workspace, with access from any device when logged in.
Absolutely! The Percentage Calculator is completely free with no sign-up required. Create a free account to unlock additional features like more calculation history, multiple workspaces, and the ability to access your saved data from any device.
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