UtilRivet
Calculator

Percentage Calculator

Calculate percentages, percentage changes, and proportions in seconds.

Runs locally in your browser · No signup

What is a Percentage Calculator?

A percentage calculator is a tool that helps you quickly compute percentages, percentage increases, percentage decreases, and proportional values. Percentages are used in finance, sales, tax calculations, discounts, statistics, and everyday problem-solving.

How to Use It

Enter the values in the input fields and the result is calculated automatically. You can calculate what percentage one number is of another, find a given percentage of a number, or determine the percentage change between two values.

Who Is This For?

This tool is useful for accountants, sales professionals, students, shoppers comparing discounts, and anyone who needs a fast and reliable percentage calculation without manual math.

Frequently Asked Questions

How do I calculate what percentage X is of Y?
Divide X by Y, then multiply by 100. For example, 25 is what percent of 200? (25 / 200) x 100 = 12.5%.
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 = (200 x 15) / 100 = 30.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, then multiply by 100. For example, from 80 to 100: ((100 - 80) / 80) x 100 = 25% increase.
Is this tool free to use?
Yes. The Percentage Calculator on UtilRivet is completely free. No sign-up required.