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Percentage Calculator – % of, Change, Increase/Decrease

Four quick calculators in one. Simple inputs, instant results.

Work with Percentages Instantly

Use the tabs to pick what you need. Results update as you type.

How to Use the Percentage Calculator

  • What is X% of Y? — Enter percent and base. Result shows X% × Y.
  • X is what % of Y? — Enter part and whole to get (X ÷ Y) × 100.
  • % Increase/Decrease — Enter original and %; choose Increase or Decrease to see the new value and amount changed.
  • Percent Change — Enter an old value and new value to see the % gain or drop.

Common Terms & Shortcuts

Percent (%): Per hundred. 25% = 25/100 = 0.25.

Increase by %: New = Old × (1 + p/100). Decrease: New = Old × (1 − p/100).

Popular searches: percentage calculator, what is x% of y, percent increase, percent decrease, percentage change, percent difference.

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