// Free Online Tool

Percentage Calculator

Calculate percentages instantly — find X% of Y, what % X is of Y, or the percentage increase/decrease between two values.

WHAT IS X% OF Y?

PERCENTAGE CHANGE (FROM → TO)

// Overview

WHAT IS THE PERCENTAGE CALCULATOR?

A Percentage Calculator is a multipurpose arithmetic tool that handles the most common percentage calculations people need in daily life. Whether you're calculating exam marks, figuring out a discount, working out your salary hike percentage, or understanding GST on a product, percentage calculations are everywhere.

Our calculator handles three common scenarios: finding what X% of a number Y is (e.g., "what is 18% of ₹5,000?"), and calculating the percentage change between two values (e.g., "my salary went from ₹40,000 to ₹48,000 — what percentage increase is that?").

Percentages are used in finance (interest rates, returns), academics (marks, grades), commerce (discounts, markup), taxation (GST, income tax slabs), and everyday life. Understanding how to compute them accurately is a fundamental life skill.

// Guide

HOW TO USE THIS TOOL

"What is X% of Y" — Enter the percentage (X) and the base number (Y). Example: 15% of 2000 = 300.
Percentage change — Enter the original value and the new value. The calculator shows whether it's an increase or decrease and by how much.

// Formula

THE FORMULA EXPLAINED

X% of Y = (X ÷ 100) × Y

Percentage Change = [(New – Old) ÷ |Old|] × 100

Positive result = percentage increase. Negative result = percentage decrease.

// Benefits

KEY BENEFITS

Multiple calculation modes in one tool
Handles both percentage-of and percentage-change calculations
Accurate to 4 decimal places
Instant, no login
Great for students, shoppers, and professionals alike

// Use Cases

WHO USES THIS TOOL?

Students calculating exam percentage from marks obtained
Shoppers calculating discounted price during sales
Employees calculating salary hike or increment percentage
Business owners calculating profit margin or markup
Tax calculations — finding what % of income goes to tax

// Pro Tips

TIPS & BEST PRACTICES

To find what % A is of B: (A ÷ B) × 100
To increase a number by X%: Number × (1 + X/100)
To decrease a number by X%: Number × (1 – X/100)
A 50% decrease followed by a 50% increase does NOT return to original — it gives 75% of original

// FAQ

FREQUENTLY ASKED QUESTIONS

How do I calculate percentage of marks?

Percentage = (Marks obtained ÷ Total marks) × 100. For example, 450/500 × 100 = 90%.

How do I find a percentage increase?

Percentage increase = [(New value – Old value) ÷ Old value] × 100. Example: salary from ₹40,000 to ₹46,000 → [(46000–40000) ÷ 40000] × 100 = 15% increase.

What is 20% of 500?

20% of 500 = (20/100) × 500 = 100.

How do I calculate profit percentage?

Profit % = (Profit ÷ Cost Price) × 100. If CP = ₹200 and SP = ₹250: Profit = ₹50, Profit % = (50/200) × 100 = 25%.

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