Percentage Calculator
Work out percentages, percentage of a total and percentage change instantly.
What is X% of Y?
What is % of ?
–
X is what percent of Y?
is what % of ?
–
Percentage change from X to Y
From to
–
Increase or decrease by a percentage
by %
–
Runs entirely in your browser. Nothing you enter is uploaded.
Every common percentage sum
Work out a tip or discount, see what share one number is of another, compare prices before and after, or add tax. Results update as you type.
Frequently asked questions
How do I work out a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 80 is 80 × 15 ÷ 100 = 12.
How is percentage change calculated?
Subtract the old value from the new value, divide by the old value and multiply by 100. From 50 to 65 is (65 − 50) ÷ 50 × 100 = 30% increase.
More free tools
Calculators
CalculatorA standard and scientific calculator with keyboard support and history.Calculators
Date CalculatorCount the days between two dates, or add and subtract days, weeks and months.AI
AI Prompt GeneratorBuild clear, structured prompts for ChatGPT, Claude or Gemini in seconds.Converters
Time Zone ConverterConvert a time between any two cities or regions, with world clocks and daylight saving handled.