🔢 Percentage Calculator

Calculate percentages in 3 different ways. All calculations happen instantly in your browser.

What is X% of Y?

What is % of ?

About This Tool

Percentage Calculator

Calculate percentages in multiple ways — what % of a number, percentage increase/decrease, and more.

Why Use This Tool?

  • Find what percentage one number is of another
  • Calculate percentage increase or decrease between two values
  • Work out exam scores, discounts, tax amounts, or profit margins
  • Useful for students, accountants, shoppers, and business owners
  • Solve all types of percentage problems without mental math errors

Overview

Percentages are everywhere — exam scores, tax rates, discount calculations, profit margins, statistical data, and everyday decision making. Yet many people still struggle with quick percentage calculations, especially when the numbers get complex. Our Percentage Calculator handles every type of percentage problem you are likely to encounter. Calculate what percentage one number is of another, find a specific percentage of any number, determine the percentage increase or decrease between two values, and more. Each calculation type is presented with a clear formula so you understand the math, not just the answer. This tool is useful for students checking their exam percentage, shoppers calculating discount savings, business owners determining profit margins, teachers computing class averages, and analysts working with statistical data. All calculations happen instantly in your browser with no server required.

How to Use

  • 1

    Choose Calculation Type

    Select from: "What is X% of Y?", "X is what % of Y?", "% Change from X to Y", or "X increased/decreased by Y%".

  • 2

    Enter the Required Values

    Fill in the number fields for your chosen calculation type.

  • 3

    Get the Result Instantly

    The answer updates in real time as you type — no need to press Calculate.

  • 4

    Read the Formula

    Each result shows the formula used so you can understand and replicate the calculation.

  • 5

    Use Multiple Calculators

    Switch between different percentage calculation types without reloading — all types are available on the same page.

Frequently Asked Questions

15% of 240 = (15/100) × 240 = 36. Our calculator computes this instantly — just enter 15 in the percentage field and 240 in the number field.
45 is (45/180) × 100 = 25% of 180. Select the "X is what % of Y" calculator type and enter the values.
% Increase = ((New Value − Old Value) / Old Value) × 100. Example: price increased from ₹400 to ₹500 = (100/400) × 100 = 25% increase.
If a product costs ₹118 inclusive of 18% GST: Base price = 118 / 1.18 = ₹100. GST amount = ₹18. Use our GST Calculator for a complete breakdown.
Percentage point is the arithmetic difference between two percentages. If interest rate goes from 5% to 8%, it increased by 3 percentage points, but by 60% in relative terms.