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Percentage Calculator

8 calculation modes · instant results as you type · no signup required

Calculation Modes
8
All percentage types
Results
Instant
No submit button needed
Price
100%
Free forever
Offline
Yes
Works without internet
1 — Basic Percentage
What is X% of Y?
Result
--
2 — Reverse Percentage
X is what % of Y?
Percentage
--
3 — Percentage Change
% increase or decrease from X to Y
Percentage Change
--
4 — Grade Calculator
I got X out of Y
Grade
--
5 — Discount / Percentage Off
X% off Y
You save
--
Final price
--
6 — Tip Calculator
X% tip on Y
Tip amount
--
Total
--
Per person
--
7 — Markup / Margin Calculator
Cost + Markup/Margin
Selling price
--
Profit
--
Markup %
--
Margin %
--
Markup = (Sell - Cost) / Cost. Margin = (Sell - Cost) / Sell. Same profit, different denominator.
8 — Fraction / Decimal to Percentage
Convert fraction or decimal to %
Percentage
--
As percentage
--
As fraction
--
Calculation History
Recent calculations
Calculations will appear here as you use the tools above.
FAQ — Frequently Asked Questions about Percentage Calculator

Frequently Asked Questions — Percentage Calculator

How do I calculate a percentage of a number?

To find X% of Y, multiply Y by X and divide by 100. For example, 15% of 200 is (200 x 15) / 100 = 30. The formula is: Result = (Percentage / 100) x Number. This calculator does it instantly as you type -- just enter the percentage and the number in Mode 1 above.

How do I find what percentage one number is of another?

To find what percentage X is of Y, divide X by Y and multiply by 100. For example, 37 is what % of 45? The answer is (37 / 45) x 100 = 82.22%. The formula is: Percentage = (Part / Whole) x 100. Use Mode 2 (Reverse Percentage) above to calculate this instantly.

How do I calculate percentage increase or decrease?

Percentage change measures how much a value has grown or shrunk. The formula is: % Change = ((New - Original) / Original) x 100. A positive result means an increase, negative means a decrease. For example, going from 80 to 100 is a 25% increase. Mode 3 above calculates this and color-codes the result green for increase and red for decrease.

How do I calculate my grade percentage?

Divide your score by the total possible points and multiply by 100. For example, 37 out of 50 = (37/50) x 100 = 74%. Mode 4 (Grade Calculator) above also converts this to a letter grade using either the US (A+ through F) or UK (First through Third) grading scale, and tells you how many more points you need for the next grade level.

What is the difference between markup and margin?

Both measure profit, but use different denominators. Markup is profit as a percentage of cost: (Sell - Cost) / Cost x 100. Margin is profit as a percentage of selling price: (Sell - Cost) / Sell x 100. A 40% markup does not equal a 40% margin -- a $50 item with 40% markup sells for $70, giving a 28.6% margin. Mode 7 above calculates both simultaneously so you can see the difference.

How do I calculate a discount percentage?

To calculate the final price after a discount, multiply the original price by (1 - discount/100). For example, 20% off $99.99 = $99.99 x 0.80 = $79.99, saving $20.00. Mode 5 above also lets you add tax after the discount to see your true final cost including sales tax.

How do I convert a fraction to a percentage?

Divide the numerator by the denominator, then multiply by 100. For example, 3/8 = 0.375 = 37.5%. The formula is: Percentage = (Numerator / Denominator) x 100. Mode 8 above handles fraction-to-percentage, decimal-to-percentage, and percentage-to-fraction conversions in one panel.

How do I split a bill with tip equally?

First calculate the tip: multiply the bill by the tip percentage divided by 100. Add the tip to the bill to get the total, then divide by the number of people. For example, an $85 bill with 18% tip = $85 + $15.30 = $100.30 total. Split 4 ways = $25.08 per person. Mode 6 above does this instantly with quick-select buttons for common tip percentages.

Is this percentage calculator free to use?

Yes, completely free. No account, no subscription, no ads. It runs entirely in your browser -- your numbers are never sent to any server. It also works offline as a PWA. It is one of the free browser-based tools at jasperbernaers.com.