Percentage Calculator

Quick tools: % of, what % is, % change, add/subtract % — accurate and mobile-friendly.

Tools

Select a calculation type below

Built-in validations

Result

Output will appear here after calculation

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Quick examples

• 20% of 150 = 30
• What % is 30 of 150 = 20%
• Change from 80 → 100 = +25%
• Add 10% to 200 = 220

Formula notes: X% of Y = (X/100) × Y · % Change = (New - Old) / Old × 100