Percentage Calculator: free online, fast and secure
Percentages come up everywhere: discounts, salary hikes, exam marks, GST, growth and profit. This calculator answers the four most common questions at once.
Find X% of a number, what percentage one number is of another, the percentage change between two values, and your marks percentage.
How to use Percentage Calculator
- Pick the question. Four calculators are shown together.
- Enter numbers. Results update instantly.
- Read the answer. Clearly shown next to each question.
Why use ConvertKaro Percentage Calculator? Free, fast and secure
Here is what makes this Percentage Calculator tool different from most websites.
100% Free
Every feature of this tool is free for everyone. We do not lock better quality or bigger files behind a paid plan.
Fast results
Your file is processed right inside your browser, so there is no upload or download queue. Most jobs finish in a second or two, even on a slow mobile connection.
Secure and private
Privacy is built in: the conversion runs locally with JavaScript, so your data is never sent to us or anyone else. Close the tab and everything is gone.
No signup, no watermark
No registration and no watermark, ever. What you download is exactly your file.
Works on every device
Works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows, Mac and Linux. No app to install.
Four calculators in one
No need to remember which formula to use.
ConvertKaro vs other websites and apps
| ConvertKaro | Typical website or app | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your data | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
Common uses for Percentage Calculator
- Exam and board marks percentage
- Salary hike and increment
- Profit and loss
- Price change and inflation
- Sales growth reports
Tips for the best results
- Percentage change = (New − Old) ÷ Old × 100.
- A 50% fall needs a 100% rise to recover.
- Marks % = obtained ÷ total × 100.
- For discounts, use the Discount Calculator.
Good to know
Calculators are only as good as their inputs. Use the exact rate and tenure from your bank or offer letter, and remember that results are estimates for planning. Percentage Calculator does not store your figures, so you can use real numbers privately. For important financial decisions, confirm the final values with your bank, accountant or financial advisor.
| Price | Free, no limits |
|---|---|
| Processing | In your browser, instant |
| Signup | Not required |
| Watermark | None |
| Works on | Android, iPhone, Windows, Mac, Linux |
| Category | Calculator tools |
How Percentage Calculator keeps your numbers private
Everything you enter into Percentage Calculator stays on your device. The tool works offline once the page has loaded, because all the logic is in the page itself rather than on a server. We never receive, log or store your numbers, so you can use it at work, at school or for personal matters without worrying about privacy.
Using Percentage Calculator on your phone
On a phone, open this page in Chrome or Safari, tap the main button and pick or paste what you need. Results download straight to your phone, usually into the Downloads folder or Files app. You can also add this page to your home screen for one-tap access next time.
Who uses Percentage Calculator?
Percentage Calculator is used every day by people from many backgrounds, for example:
- Salaried people planning loans, savings and investments
- Shop owners and freelancers calculating GST and discounts
- Students solving maths and finance problems
- Families planning budgets and big purchases
- Anyone who wants a quick, accurate answer without a spreadsheet
Supported input: Indian number format (lakh and crore) with ₹ amounts, and standard units.
Frequently asked questions
How do I calculate percentage of marks?
Divide marks obtained by total marks and multiply by 100. 432 out of 500 is 86.4%.
How do I calculate percentage increase?
Subtract old from new, divide by old, multiply by 100.
What is 18% of 2,500?
450.
Is Percentage Calculator really free?
Yes, completely free. You can use it as many times as you want, and every option on the page is included at no cost.
Is it safe to use Percentage Calculator online?
Yes. Your data are processed inside your own browser and are never uploaded to our servers, so nobody else can see them.
Does Percentage Calculator work on mobile?
Yes, the tool is built mobile-first. Open this page on your phone, add your data and download the result directly.
Do I need to install anything to use Percentage Calculator?
No. Percentage Calculator works in your web browser. There is no app, plug-in or extension to install.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Copy or download the result as it is.
Does Percentage Calculator work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.
Related free tools
You may also find these tools useful: Discount Calculator, GST Calculator, BMI Calculator, Age Calculator, Unit Converter.