What is the Percentage Calculator?
The Percentage Calculator offers four common percentage calculations in one tool: finding a percentage of a number, finding what percent one number is of another, calculating percentage change, and adding or removing a percentage from a value.
How to Use This Percentage Calculator
- Pick the calculation mode that matches your question.
- Enter the two required values.
- Read the result instantly as you type.
- Switch tabs anytime to try a different calculation.
- Copy the result for your records.
When Do You Need a Percentage Calculator?
- Calculating a tip, discount, or tax amount quickly.
- Figuring out how much a metric grew or shrank between two periods.
- Adding a markup or removing a discount from a base price.
Frequently Asked Questions
How to calculate percentage?
To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 50 is (20 x 50) / 100 = 10. To find what percent X is of Y, divide X by Y and multiply by 100.
Percentage vs percentage points?
A percentage point is the simple arithmetic difference between two percentages, like going from 40% to 50% being a 10 percentage point increase. A percentage change describes that same move as a relative 25% increase. The two are easily confused but mean different things.
Percentage increase formula?
Percentage increase = ((New Value - Old Value) / Old Value) x 100. If the result is negative, it represents a percentage decrease instead.
What is basis points?
A basis point is one hundredth of one percentage point (0.01%). They are commonly used in finance to describe small changes in interest rates or yields with more precision than whole percentage points allow.