🔢 Percentage Calculator

Three calculators in one — instant percentage results.

What is% of?
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How to Use This Percentage Calculator

This tool offers three percentage calculation modes that cover the most common scenarios:

  • What is X% of Y? — Find a percentage of any number (e.g., "What is 15% of 200?" → 30)
  • X is what % of Y? — Determine what percentage one number is of another (e.g., "25 is what % of 200?" → 12.5%)
  • % Change from X to Y — Calculate the percentage increase or decrease between two values (e.g., "From 80 to 100" → +25%)

Percentage Formulas

  • X% of Y = (X / 100) × Y
  • X is what % of Y = (X / Y) × 100
  • % Change = ((New − Old) / |Old|) × 100

Common Use Cases

Percentages come up everywhere: calculating discounts while shopping, figuring out tips at restaurants, analyzing test scores, tracking investment returns, or computing tax amounts.

Speed up your daily work with keyboard shortcuts that save hours every week.