01FIND A VALUE
What is X% of Y?
Find a percentage of any number.
Your result100
20% × 500 ÷ 100
Explore all tools →Percentage Calculator
Calculate percentages, compare values, find increases or decreases, and adjust amounts with simple, instant calculations.
✓ Four useful calculators✓ Instant results✓ Free to use
02FIND A PERCENTAGE
X is what percentage of Y?
Compare a part with the whole.
Your result25%
50 ÷ 200 × 100
03COMPARE VALUES
Percentage increase or decrease
See how much a value has changed.
Percentage change+50%
Increase from the original value
04ADJUST AN AMOUNT
Add or subtract a percentage
Calculate a markup, discount, or price adjustment.
Final amount1,180
1,000 + 180
Percentage formulas made simple
Understand the calculation behind each result.
01Percentage of a number
(Percentage ÷ 100) × Number
02What percentage?
(Part ÷ Whole) × 100
03Percentage change
((New − Original) ÷ |Original|) × 100
04Add or subtract
Original amount ± (Original amount × Percentage ÷ 100)
Get your answer in three steps
1Choose a calculator
Select the calculation you need.
2Enter your numbers
Update the values to calculate instantly.
3Copy your result
Copy your answer with one click.
Percentage calculator FAQs
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 20% of 500 is 100.
How do I calculate percentage increase or decrease?
Subtract the original value from the new value, divide by the absolute original value, and multiply by 100.
Can I calculate a discount or markup?
Yes. Enter the original amount and percentage, then choose Add or Subtract.
Is this percentage calculator free?
Yes. It is free to use and calculations run in your browser without an account.
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Your numbers stay in your browser.
Calculations run on your device. No account is required.