% Percentage Calculator

Calculate percentages, percentage change, and ratios instantly.

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Percentage Calculator

Three calculation modes for all percentage needs

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What is a Percentage Calculator?

A Percentage Calculator is an essential online tool that helps you compute percentages quickly and accurately. Percentages are used everywhere — from shopping discounts and tax calculations to school grades and financial analyses. Our calculator supports three common percentage calculation modes, covering virtually every real-world scenario.

Mode 1: Percentage of a Number

This mode answers the question: "What is X% of Y?" For example, "What is 15% of 200?" The answer is 30. Simply enter the percentage and the number to get the result instantly.

Mode 2: Percentage Change

Calculate the percentage increase or decrease between two values. Formula: ((New Value − Original Value) / Original Value) × 100. For instance, a price increase from ₹500 to ₹600 is a 20% increase.

Mode 3: X is What Percent of Y?

This mode tells you what percentage one number is of another. For example, "30 is what percent of 150?" The answer is 20%. This is commonly used for calculating scores, ratios, and proportions.

Practical Examples

  • Finding the discount amount: 20% of ₹1,500 = ₹300
  • Calculating tax: 18% GST on ₹2,000 = ₹360
  • Grade calculation: 85 out of 100 = 85%
  • Salary hike: From ₹40,000 to ₹48,000 = 20% increase

Frequently Asked Questions

How do I calculate percentage of a number?+
Multiply the number by the percentage and divide by 100. For example, 20% of 500 = (20 × 500) / 100 = 100. Use our "% of Number" tab for instant results.
What is the formula for percentage increase?+
Percentage Increase = ((New Value - Original Value) / Original Value) × 100. Use our "% Change" tab to calculate this automatically.
How do I find what percentage X is of Y?+
Divide X by Y and multiply by 100. For example, 40 is what percent of 200? = (40/200) × 100 = 20%. Use the "X is % of Y?" tab in our calculator.
Can I use this calculator for GST calculations?+
Yes! Use the "% of Number" tab to calculate GST. Enter the GST rate (e.g., 18) and the base amount. For a dedicated GST tool, try our GST Calculator which handles both adding and removing GST.