Percentage Calculator

Calculate percentages, percentage change, tips, discounts, margins, and more

Basic

Applied

What is X% of Y?

Percentage (%)

Number

Result

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Quick Reference

Percentage Formulas Reference

Calculation	Formula
X% of Y	(X / 100) x Y
X is what % of Y	(X / Y) x 100
% Change	((New - Old) / \|Old\|) x 100
Increase by %	Value + (Value x %/100)
Decrease by %	Value - (Value x %/100)
Profit Margin	(Profit / Selling Price) x 100
Markup	(Profit / Cost Price) x 100

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What is Percentage Calculator?

Free online percentage calculator to solve any percentage problem quickly with this free online percentage calculator.

Calculate what percentage one number is of another, find the percentage increase or decrease between two values, or determine a specific percentage of any number. The tool handles all common percentage operations in one place with clear, step-by-step results. Runs entirely in your browser with no signup required - your calculations stay private.

How to Use Percentage Calculator

1Select the type of percentage calculation you need (percentage of a number, percentage change, or what percent X is of Y)
2Enter the required values in the input fields
3View the calculated result along with the formula used
4Copy the result or clear the fields to perform another calculation

Frequently Asked Questions

To find a percentage of a number, multiply the number by the percentage and divide by 100. For example, 25% of 200 is (200 x 25) / 100 = 50. This calculator handles the math for you - just enter the values and get instant results.

Percentage change is calculated as ((New Value - Old Value) / Old Value) x 100. A positive result means an increase, and a negative result means a decrease. Enter your old and new values, and the tool computes the change instantly.

A percentage is a fraction of 100 (e.g., 85% means 85 out of 100). A percentile indicates a value below which a given percentage of observations fall in a dataset (e.g., the 90th percentile means you scored higher than 90% of participants). This tool calculates percentages, not percentiles.

Yes. The calculator uses precise arithmetic suitable for financial percentage calculations such as discounts, tax rates, profit margins, and interest rates. Results are displayed with full decimal precision.

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Calculation

Formula

X% of Y

(X / 100) x Y

X is what % of Y

(X / Y) x 100

% Change

((New - Old) / |Old|) x 100

Increase by %

Value + (Value x %/100)

Decrease by %

Value - (Value x %/100)

Profit Margin

(Profit / Selling Price) x 100

Markup

(Profit / Cost Price) x 100

What is Percentage Calculator?

Free online percentage calculator to solve any percentage problem quickly with this free online percentage calculator.

Frequently Asked Questions