Free Online Percentage Calculator
Calculate percentage values, percentage differences, and proportions instantly.
1. What is X% of Y?
2. X is what % of Y?
How to Calculate Percentages
Percentage is a mathematical ratio expressed out of 100. Use our calculator for quick math without manual formulas.
Help & Answers
Percentage Calculator — Frequently Asked Questions
How do I calculate what percentage A is of B?
Divide A by B and multiply by 100. E.g., 25 / 100 * 100 = 25%.
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⚡ Tool Overview
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Your data never leaves your device
All calculations and text processing happen locally inside your web browser. No server storage or third-party tracking.