Ultimate Percentage Calculator

Calculate percentages instantly with our free online tool. Works with percentage of a number, percentage increase/decrease, reverse percentage calculations, markup/discount percentages, and more. No buttons needed - results update automatically as you type!

Calculation Result

NaN% of NaN = NaN

Key Features:

  • 7 Calculation Modes - All percentage formulas in one tool
  • Instant Results - No calculate button needed
  • Mobile-Friendly - Works perfectly on all devices
  • Percentage Increase/Decrease - Calculate growth or reduction
  • Reverse Calculations - Find original values before percentage changes
  • Markup/Discount Tool - Perfect for pricing and shopping
  • Financial Calculations - Interest rates and more
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