Shop pricing
Add a 12% price rise or work out what share of sales one product makes.
Percentage Calculator
Choose the question you have, enter two numbers and see the answer with the working.
Your files stay with you. Your files never leave your browser. This tool runs on your device: nothing is uploaded to our servers, so there is nothing for us to store or see.
How to use it
- Pick the type of percentage question.
- Fill in the two numbers.
- Read the answer and the working shown below it.
Where it helps
Marks and results
Turn exam marks into a percentage, or check a cut-off.
Growth figures
See how much sales or followers changed month on month.
Good to know
Stays in your browser
Numbers you type are worked out on your device and never sent to our servers.
Changes aren't symmetric
Up 25% then down 20% returns to where you started.
Check the base
A percent is always 'of' something; know what that is.
Questions people ask
How do you calculate a percentage of a number or a percentage change?
Choose your question: X% of Y, X is what percent of Y, increase or decrease by a percent, find the total, or the change between an old and a new value. Enter the two numbers and the answer shows with the working, so you can see exactly how it was reached and repeat it on paper.
- 5 Question types. Pick the one you need.
- Working Shown below. Step by step.
- Up or down Percentage change. Increase or decrease.
- 0 Sign-up. Just type.
How do I find a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 2,000 is 2,000 times 15 divided by 100, which is 300. Choose 'X% of Y' in the tool, type 15 and 2,000, and the answer appears with the same working written out under it.
How is percentage change worked out?
Subtract the old value from the new value, divide by the old value and multiply by 100. Going from 800 to 1,000 is a 25% increase. Going back from 1,000 to 800 is a 20% decrease, not 25%, because the starting value is different each time.
How do I work out what percent one number is of another?
Divide the part by the whole and multiply by 100. If 45 of your 180 orders came from WhatsApp, that's 45 divided by 180, times 100, which is 25%. Choose 'X is what % of Y' and the tool shows the share along with the division it used.
How do I add or remove a percentage from a price?
Choose 'Increase or decrease', enter the amount and the percentage, and pick the direction. A ₹1,200 price raised by 10% becomes ₹1,320, and the same price cut by 10% becomes ₹1,080. The tool also shows how much was added or taken off. It works the same way for salaries, rents and targets.
How do I find the original total from a percentage?
If you know that 300 is 15% of something, divide 300 by 15 and multiply by 100 to get 2,000. Choose 'Find the total' and enter both numbers. It's useful when you know a commission, tax or deposit amount and its rate, and need the full figure.
Why can't the tool show a change from zero?
A percentage change compares against the old value, and you can't divide by zero. Going from 0 to 50 sales is a real change, but not one that can be written as a percent. The tool says so plainly instead of showing a meaningless result such as infinity.
How do I calculate exam marks as a percentage?
Divide the marks you scored by the maximum marks and multiply by 100. 432 out of 500 is 86.4%. For an average across subjects with different maximums, add up all marks scored and all maximum marks first, then divide, rather than averaging the subject percentages.
Is a 50% rise followed by a 50% fall back to the start?
No. ₹100 up 50% is ₹150, and ₹150 down 50% is ₹75, which is less than you started with. Each percentage is taken on a new base. To undo a rise of X%, the fall needed is always smaller, which surprises many people checking discounts or stock prices.
What is the difference between a percent and a percentage point?
A percentage point is the plain gap between two percentages. An interest rate going from 8% to 10% rose by 2 percentage points, but by 25% in relative terms. News reports and bank notices sometimes mix the two, so check which one is meant. The tool's change mode gives the relative figure.
How do I work out GST as a percentage?
To add 18% GST to ₹1,000, use the increase option to get ₹1,180. To find the GST inside a price that already includes it, the GST calculator is quicker, because it divides by 1.18 rather than taking 18% off. Taking 18% off ₹1,180 gives the wrong base.
How many decimal places does it show?
Results are rounded to a sensible number of decimals for reading, and the working shows the numbers used. For money, round to the nearest rupee or paisa as your invoice or bank does. For marks and growth figures, one or two decimal places are usually enough.
Can I use it to check a shop's discount?
Yes. Use 'X is what % of Y' with the saving and the original price, or try the discount calculator, which handles a second discount and GST too. A shirt cut from ₹1,500 to ₹1,050 has a ₹450 saving, which is a 30% discount on the tag price.
Is anything I type stored?
No. Every calculation runs in your browser and the numbers stay on your device. There's no account and nothing is saved after you close the page, so you can work out sales figures, salaries or marks without them going anywhere else. Close the tab and the figures are gone for good.
Does it work on a phone?
Yes. The question types sit in a row of buttons you can tap, the number keypad opens for each field and the working is easy to read on a small screen. It loads quickly in any mobile browser, so it's handy at a shop counter or during a meeting.
Is the percentage calculator free?
Yes, it's free with no sign-up and no limit. It's one of the free converters and calculators from Marketiism, along with the discount, profit margin and salary hike tools. Marketiism, our paid software, handles billing and WhatsApp for small businesses. Use it as often as you need, for work or study.
Want this inside your own account?
Marketiism keeps your invoice numbers, GST reports, UPI payment links and WhatsApp reminders in one place. Leave your details and we'll call to set it up for your business, or start the trial yourself.
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