Percentage Calculator
Calculate percentage of a number, find what percent one number is of another, or check percentage increase/decrease. Copy, save, share & view history.
Saved History
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Percentage Calculator – Calculate Percent, Percentage Change & More Instantly
This upgraded Age Calculator includes advanced features:
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Calculate age in years, months, days
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Calculate age on any date (past or future)
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Auto-format DOB input (DD-MM-YYYY)
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Live next birthday countdown (days • hours • minutes • seconds)
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Save results locally (History)
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Load or delete past results
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Share results with one click
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Clean UI, mobile-friendly, easy to use
How to Use the Percentage Calculator
Using this tool is simple:
1. Percentage Of (X% of Y)
Find the value when you know the percent.
Example:
“15% of 200” = 30
2. What Percent (X is what percent of Y)
Useful for comparing two numbers.
Example:
“50 is what percent of 200?” = 25%
3. Percentage Change
Find how much a number increased or decreased in percentage.
Example:
From 100 to 150 = 50% increase.
After entering your values:
✔ Press Calculate
✔ View result instantly
✔ Use Copy, Save, Share, or History features
Everything is fast, accurate, and mobile-friendly.
Why Use a Percentage Calculator?
Manually solving percentages can be slow and error-prone.
This tool helps you:
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Calculate discounts (shopping)
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Calculate tax and GST
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Compare business performance
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Solve school/college math problems
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Check profit & loss percentage
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Understand salary hikes
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Convert values into percentage format
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Analyze chart or report values
This calculator handles everything instantly with precision.
Percentage Formulas Explained
Here are the formulas used:
1. Percentage Of Formula
X% of Y = (X / 100) × Y
Example:
20% of 250 = (20/100) × 250 = 50
2. What Percent Formula
What percent = (Part / Whole) × 100
Example:
60 is what percent of 300?
= (60/300) × 100 = 20%
3. Percentage Change Formula
Percentage Change = [(New - Old) / Old] × 100
If result is positive → Increase
If result is negative → Decrease
Example:
Old = 500, New = 650
Change = 30% increase
Real Examples (Common Percentage Calculations)
These examples show exactly how this tool works in real life.
| Operation | Example | Result |
|---|---|---|
| X% of Y | 25% of 400 | 100 |
| What percent | 30 of 120 | 25% |
| Increase | 200 → 260 | 30% increase |
| Decrease | 150 → 120 | 20% decrease |
| Discount | 15% off 2000 | ₹300 discount |
Features of This Percentage Calculator
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Supports all percentage operations
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Fast & accurate
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Easy mobile UI
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Copy results
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Save results
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Share results
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Searchable calculation history
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No ads, no signup
Designed for everyone – students, accountants, business owners, and general users.
Frequently Asked Questions (FAQ)
What is a percentage?
A percentage is a way to express a number as a fraction of 100.
Can I use decimals?
Yes - the calculator accepts whole numbers, decimals, and large numbers.
How accurate is the calculator?
It uses standard mathematical formulas and provides precise results up to decimal points.
Can I calculate percentage increase and decrease?
Yes - simply choose “Percentage Change” mode.
Does this tool save my calculations?
Yes - your history is saved in your browser for quick reference.
Does this work on mobile?
100% mobile-friendly and works in all modern browsers.
Disclaimer
This calculator provides general calculations for educational, financial, and personal use. For tax, commerce, or legal purposes, double-check results from official sources.