Overview
What Is a Percentage Calculator?
This tool solves the three most common percentage problems: finding what percentage one number is of another, finding a percentage of a number, and calculating percentage change between two values.
Calculate percentages, percentage change, and more - instantly.
This tool solves the three most common percentage problems: finding what percentage one number is of another, finding a percentage of a number, and calculating percentage change between two values.
Useful for calculating discounts, grades, tips, statistics, or any situation involving percentages.
Select whether you want to find a percentage, a percentage of a number, or percentage change.
Input the values into the fields.
The answer updates automatically as you type.
Divide the part by the whole and multiply by 100. For example, 25 out of 200 is (25/200)×100 = 12.5%.
Percentage change measures how much a value has increased or decreased relative to its original value: ((New-Old)/Old)×100.
Multiply the number by the percentage divided by 100. For example, 20% of 150 is 150 × 0.20 = 30.
Yes, a negative percentage typically represents a decrease or a negative value in the underlying data.
Yes, it handles any numeric range with standard floating-point precision.
Percentage points measure the arithmetic difference between two percentages, while percentage change measures relative change.
Yes, if you know the result and the percentage, you can work backward - enter your known values in the appropriate calculation type.
Yes, both are common uses - calculate X% of a bill or original price.
No, the calculator supports decimal inputs and outputs for precision.
Yes, completely free with no sign-up required.