Percentage Calculator
Find percentages, increases, decreases, and differences in one click.
The percentage calculator above helps you find what percent one number is of another, calculate a percent increase or decrease, or work out the difference between two values, all in one click. Enter your numbers below to get an instant, accurate result.
What Is the Percentage Calculator?
This percentage calculator handles the most common percentage problems people run into, whether you’re calculating a discount, a tip, a grade, or year-over-year growth. It supports finding a percentage of a number, a percentage increase or decrease, and the percentage difference between two numbers.
How to Use the Percentage Calculator
- Choose the type of percentage calculation you need (percent of a number, increase/decrease, or difference).
- Enter the numbers involved in the calculation.
- Click Calculate to see your result instantly.
Common Percentage Formulas
To find what percent X is of Y, divide X by Y and multiply by 100. To find a percentage increase or decrease, subtract the original value from the new value, divide by the original value, and multiply by 100. For a deeper refresher on the underlying math, see the Khan Academy guide to percentage word problems.
Percentage vs CGPA vs GPA
Percentages, CGPA, and GPA are different scales used to describe the same underlying performance. If your school reports grades as CGPA and you need a percentage (or vice versa), try our CGPA Calculator to convert between the two.
Frequently Asked Questions
How do I calculate a percentage increase?
Subtract the original number from the new number, divide the result by the original number, then multiply by 100. For example, going from 50 to 65 is a 30% increase, since (65-50)/50 × 100 = 30.
What is the difference between percentage change and percentage difference?
Percentage change measures how much a value has grown or shrunk relative to its original value (useful for tracking change over time). Percentage difference compares two values relative to their average, without treating either one as the “original” — it’s often used when comparing two independent measurements.