Skip to content

Percentage Calculator

Solve every common percentage question: X% of Y, what percent, and percentage change.

Loading tool

This tool runs in your browser. Nothing is uploaded.

About Percentage Calculator

Percentage Calculator answers the four questions people ask most: what is X% of Y, X is what percent of Y, the percentage change from X to Y, and a value after a percentage increase or decrease.

For school maths, tips, price changes, grades and reports.

What it does

  • Four calculators on one page
  • Working shown for every answer
  • Handles negative changes

How to use Percentage Calculator

  1. Pick the question that matches yours.
  2. Enter the two numbers.
  3. Read the answer and the working.

Frequently asked questions

How do I calculate percentage change?

Subtract the old value from the new value, divide by the old value and multiply by 100.

Why is a 50% drop not undone by a 50% rise?

The rise applies to a smaller number. 100 minus 50% is 50, and 50 plus 50% is 75.

Limits and privacy

Percentage change from zero is undefined and reported as such.

Everything happens on your device, so your content never reaches our server.

Discount CalculatorFind the sale price and savings from a percentage or fixed discount, including stacked discounts.In browserProfit Margin CalculatorCalculate gross profit, margin and markup from cost and selling price.In browserMarkup CalculatorFind the selling price from cost and markup percentage, or the markup from two prices.In browser