Percentage Calculator
Welcome to the most advanced and mobile-friendly Percentage Calculator online!
This all-in-one calculator helps you solve any percentage question instantly — whether you want to find what is X% of Y, how much percent one number is of another, percentage increase or decrease, or even original and final values after change. No formulas needed — just enter your numbers and get your answer instantly!
Percentage Calculator
What Is a Percentage Calculator?
- A percentage calculator is an online tool that helps you calculate percentages automatically.
Instead of manually using formulas like(Part / Whole) × 100
you can simply enter the values and get the result in seconds. - Percentages are used everywhere — from discounts, profit/loss, marks, and statistics to financial growth and interest rates.
How to Use Online Percentage Calculator
- Select the Type of Calculation from the dropdown (e.g., “What is X% of Y?”).
- Enter your two values in the boxes.
- Click Calculate to get your instant result.
- Use Clear to reset and start a new problem.
- This calculator works perfectly on mobile, tablet, and desktop, making it ideal for students, professionals, and everyday users.
Types of Percentage Calculations You Can Do
| Sr. No. | Type of Calculation | Formula |
|---|---|---|
|
1 |
What is X% of Y? |
(X ÷ 100) × Y |
|
2 |
X is what % of Y? |
(X ÷ Y) × 100 |
|
3 |
% Increase (from X to Y) |
((Y – X) ÷ X) × 100 |
|
4 |
% Decrease (from X to Y) |
((X – Y) ÷ X) × 100 |
|
5 |
% Change |
((Y – X) ÷ X) × 100 |
|
6 |
Find Original Value (After % change) |
New ÷ (1 ± % ÷ 100) |
|
7 |
Find New Value (After % change) |
Old × (1 ± % ÷ 100) |
|
8 |
% Difference between X & Y |
[ 2 (X – Y) / (X + Y) ] x 100 |
|
||
Examples Of Percentage Calculations
- Example 1: What is 25% of 200?
- ➡️ (25 ÷ 100) × 200 = 50
- Example 2: What percent is 50 of 400?
- ➡️ (50 ÷ 400) × 100 = 12.5%
- Example 3: Percentage Increase from 120 to 150
- ➡️ ((150 − 120) ÷ 120) × 100 = 25% increase
- Example 4: Percentage Decrease from 200 to 150
- ➡️ ((200 − 150) ÷ 200) × 100 = 25% decrease
Why Use Our Online Percentage Calculator?
- 100% Free and Easy to Use
- Works on all Devices (Responsive design under 500px)
- Covers all 8 percentage problems in one tool
- Instant results without any ads or distractions
- Perfect for students, teachers, and professionals
- Copy-paste ready for WordPress or Blogger widgets
Common Uses of Percentage Calculations
Percentages are used in daily life for:
- Discounts & Sales: “40% off” calculations
- School Marks & Grades: Convert marks into percentage
- Finance: Profit/Loss and Growth Rates
- Data Analysis: Percentage change in data values
- Statistics & Reports: Comparing performance or changes over time
Example Real-Life Scenarios
- You want to know “What is 15% of ₹8,000?” — just type 15 and 8000.
- You bought something at ₹600, now it’s ₹720 — check percentage increase (20%).
- You scored 350 out of 500 — find percentage (70%).
- Want to reverse-calculate your pre-discount price? Use Find Original Value type.
Frequently Asked Questions (FAQs) — Percentage Calculator
- 1. What is a Percentage Calculator?
- A percentage calculator is an online tool that helps you quickly find percentages, increases, decreases, and differences between numbers. Instead of using manual formulas like
(Part ÷ Whole) × 100, you can enter the values and get instant results.
Our online percentage calculator works for all types of percentage problems including percent of number, percent change, and percent difference.
- 2. How do I calculate percentage manually?
- You can calculate a percentage using this simple formula:
Percentage = (Part ÷ Whole) × 100
👉 Example: If you got 45 marks out of 60, then
(45 ÷ 60) × 100 = 75%.
You can also use our free percentage calculator to find the answer instantly.
- 3. How do you calculate X% of a number?
- To find X percent of Y, multiply the number by the percentage and divide by 100.
Formula:(X × Y) ÷ 100
👉 Example: 20% of 250 = (20 × 250) ÷ 100 = 50.
Our “What is X% of Y” calculator makes this process even easier — just enter the values and get the answer instantly.
- 4. How to calculate percentage increase or decrease?
- To find percentage increase, use:
((New Value - Old Value) ÷ Old Value) × 100
To find percentage decrease, use:((Old Value - New Value) ÷ Old Value) × 100
Example: From 80 to 100 → 25% increase.
Our percentage change calculator instantly tells you whether the change is an increase or decrease.
- 5. How can I find what percent one number is of another?
- Use this formula:
(Part ÷ Whole) × 100
Example: 30 is what percent of 200?
→ (30 ÷ 200) × 100 = 15%.
You can also select “X is what % of Y?” from the dropdown in our calculator.
- 6. What is the formula for percentage change?
- Percentage Change = ((New Value – Old Value) ÷ Old Value) × 100
It helps you understand the relative change between two values — useful in finance, sales, and data analysis.
You can use our online percentage change calculator to get the result automatically.
- 7. How do I find the original value before a percentage increase or decrease?
- Use this reverse percentage formula:
Original Value = New Value ÷ (1 ± (Percent ÷ 100))
Example: If your amount after a 20% increase is ₹1200,
Original = 1200 ÷ 1.2 = ₹1000.
Our reverse percentage calculator finds this instantly.
- 8. How to calculate the percentage difference between two numbers?
- Formula:
|A − B| ÷ ((A + B) ÷ 2) × 100
Example: Between 80 and 100 → |20| ÷ 90 × 100 = 22.22% difference.
Use our percentage difference calculator to compare prices, scores, or data values easily.
- 9. What are the most common uses of percentage calculators?
- Percentages are used in:
- Discount and Sale Price Calculations
- Profit or Loss Percentage
- School Marks and Exam Scores
- Data Growth or Decline Analysis
- Financial Performance and Business Reports
- Our online percentage calculator tool helps you handle all these easily — whether for personal, academic, or professional use.
- 10. Why should I use an online percentage calculator instead of doing it manually?
- Manual calculations can be time-consuming and prone to errors.
An online percentage calculator gives instant, accurate results for percent of a number, percentage change, increase, decrease, and difference.
It’s fast, mobile-friendly, and supports all 8 types of calculations in one tool.
- 11. Can I use this calculator on my mobile phone?
- ✅ Yes!
Our mobile-responsive percentage calculator automatically adjusts to your screen size and works perfectly on smartphones, tablets, or desktops.
No app needed — just open and calculate.
- 12. Is this percentage calculator free to use?
- Yes — our percentage calculator is 100% free with no login or registration required.
You can use it as many times as you want, directly on your browser.
Final Conclusion
- Our All-in-One Percentage Calculator makes percentage math simple and instant.
- No need to remember formulas — just choose the type, enter numbers, and get the result instantly.
- Try it now and make every percentage problem easy to solve in seconds!
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