Calculate Percentage

A fast, simple tool to calculate percentages — find X% of Y, what percent one number is of another, and percentage change.

What is % of ?

More percentage calculators

Calculating percentages

Calculating percentages is a useful everyday skill — whether you're working out the sale price of an item, your grades, or how much to tip at a restaurant.

The basic process:

  1. Identify the whole (the total, or base).
  2. Identify the part (the value you want as a percentage).
  3. Divide the part by the whole, then multiply by 100.

For example, to find what percentage 10 is of 50: 10 ÷ 50 = 0.2, then 0.2 × 100 = 20%. So 10 is 20% of 50.

The general formula is:

percentage = (part / whole) × 100

Rearrange it to solve for a missing value:

whole = part / (percentage / 100)   part = (percentage / 100) × whole

How to use this tool

  1. Pick a mode: find X% of Y, find what percent X is of Y, or find the percentage change from X to Y.
  2. Enter your numbers — the result and the working update as you type.
  3. Use Copy to copy the answer, or Share to copy a link that reopens the same calculation.