Percentage Calculator – Free Online Tool

Our free online Percentage Calculator, quickly calculate percentages and percentage changes.
Perfect for finance, school, business, and everyday use. Works on both desktop and mobile.

Percentage Calculator

Base Value:

Percentage (%):

Optional Second Value (for difference):

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How to Use the Percentage Calculator

Our calculator gives you four different results at once:

Percentage Of
Enter a base number and a percentage.
Example: 20% of 150 = 30.
Percentage Increase
Shows the new value if the base number increases by a given percentage.
Example: 150 increased by 20% = 180.
Percentage Decrease
Shows the reduced value if the base number decreases by a given percentage.
Example: 150 decreased by 20% = 120.
Percentage Difference
Compare two numbers by entering both the base and the second value. The calculator shows how much larger or smaller the second number is in percentage terms.
Example: Comparing 80 and 100 = 25% increase.

Q1: How do I calculate a percentage of a number?

A: Enter the base value and the percentage. The calculator instantly shows the result (e.g., 20% of 150 = 30).

Q2: What is the difference between percentage increase and decrease?

A: Percentage increase shows the new value after adding a percentage (e.g., 150 + 20% = 180).
Percentage decrease shows the reduced value after subtracting a percentage (e.g., 150 – 20% = 120).

Q3: How do I compare two numbers with the percentage difference tool?

A: Enter both numbers, and the calculator shows the relative difference as a percentage (e.g., 80 compared to 100 = 25% increase).

Q4: Is the calculator free to use?

Yes, it’s 100% free, with no signup or subscription required.

About the Percentage Calculator

This calculator makes it easy to calculate percentages, percentage changes, and differences in just seconds. Whether you’re a student, business owner, or just handling everyday tasks, this tool helps you quickly solve percentage problems without complicated formulas.

Perfect for:

Finance and savings calculations
Discounts and price changes
Business and data analysis
Schoolwork and personal use

Works seamlessly on both desktop and mobile.