Percentage Calculator

Our Percentage Calculator quickly calculates percentages, percentage increases, decreases, differences, and ratios. It is useful for finance, academics, shopping discounts, and everyday calculations.

Math Tools·Finance

Percentage Calculator

Six calculation modes. Results update as you type.

Find the value that equals a given percentage of a number.

e.g. 25 for 25%
The base number
Result
50
%
Formula
25% × 200 = 50
Breakdown
Percentage
25%
Base value
200
Result
50
Remaining
150

Quick Reference

  • X% of YDiscount, tip, tax calculations
  • % ChangePrice changes, growth rates
  • % DifferenceComparing two independent values
  • X of Y = ?%Score out of total, market share
  • IncreaseMarkup, salary raise, price hike
  • DecreaseSale price, reduction, markdown

Common Formulas

  • X% of Y: (X ÷ 100) × Y
  • % Change: ((New − Old) ÷ |Old|) × 100
  • % Difference: |A − B| ÷ ((A + B) ÷ 2) × 100
  • Part of Whole: (Part ÷ Whole) × 100
  • After increase: Value × (1 + Rate ÷ 100)
  • After decrease: Value × (1 − Rate ÷ 100)
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