Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly.
Calculate
Result updates as you type.
Examples
Input
What is 15% of 200?
Output
30
Input
Percentage change from 80 to 100?
Output
+25%
About this tool
Use this percentage calculator to solve the most common percentage problems instantly. Choose from four calculation modes: finding a percentage of a number, finding what percent one number is of another, calculating percentage change, or adjusting a number up or down by a percentage.
How to use
- Select the type of percentage calculation you need.
- Enter the numbers in the fields provided.
- Read the result instantly and copy it if needed.
Common percentage calculations
Percentage calculators are used in everyday situations such as working out discounts, tips, tax amounts, grade scores, salary changes, and statistical comparisons. Instead of doing mental math or reaching for a formula, this tool gives the answer as you type.
The four modes cover the most common percentage questions: finding a percentage of a value, finding what percentage one number represents of another, calculating how much something increased or decreased, and applying a percentage change to a starting value.
Percentage change explained
Percentage change measures how much a value grew or shrank relative to the original. A positive result means an increase and a negative result means a decrease. It is commonly used for price changes, growth rates, and performance comparisons.
FAQ
What is the formula for percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 is (15 / 100) × 200 = 30.
How do I calculate percentage change?
Subtract the original value from the new value, divide by the original value, and multiply by 100. A positive result is an increase and a negative result is a decrease.
Can I calculate a discount with this tool?
Yes. Use the Increase / Decrease mode, enter the original price, select Decrease, and enter the discount percentage to get the final price.
Related Tools
Word Counter
Count words, characters, and sentences instantly.
Open tool
Character Counter
Count characters instantly with or without spaces.
Open tool
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back.
Open tool
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly.
Open tool
Age Calculator
Calculate your exact age or the difference between two dates in years, months, and days.
Open tool
Diff Checker
Compare two texts and highlight the differences line by line.
Open tool