Percentage Calculator
Calculate percentages instantly — find % of a number, what % one number is of another, percentage change and percentage difference. 4 modes in one tool.
✅ Free ⚡ Instant 4 Modes 🔒 Private
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Percentage Calculator% of Number
X is what % of Y
% Change
% Difference
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4 Calculation Modes
% of number, X is what % of Y, % change, and % difference — all in one tool.
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Live Results
Results appear as you type — no button needed.
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Copy Answers
Copy any result value with one click.
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Private
All calculations run locally. Nothing is sent to any server.
⭐ User Reviews
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Alex T.
Yesterday
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Exactly what I needed — clean inputs, instant results, and the breakdown shows the working so I can double-check. Bookmarked.
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Sara K.
2 days ago
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I use this every week for my freelance invoicing. The copy buttons save so much time when pasting into spreadsheets.
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Dan M.
1 week ago
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No ads cluttering the page, no sign-up wall. Just enters the numbers and get the answer. Refreshingly simple.
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Laura B.
2 weeks ago
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The formula explanation below the result is a great learning aid. I now understand the maths behind what I was calculating.
Calculator Tools📖 How to Use
1
Choose mode
Select the calculation type: % of number, X is what % of Y, change or difference.
2
Enter values
Type your numbers into the input fields.
3
Read result
The answer appears instantly with the full formula shown.
4
Copy
Click Copy next to any value to use it elsewhere.
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❓ FAQ
What is the formula for percentage of a number?+
Percentage of a number = (Percentage ÷ 100) × Number. For example, 25% of 200 = (25 ÷ 100) × 200 = 50.
How do I calculate percentage change?+
Percentage change = ((New Value - Old Value) ÷ Old Value) × 100. A positive result is an increase; negative is a decrease.
What is the difference between percentage change and percentage difference?+
Percentage change measures the change from one value to another relative to the original. Percentage difference measures the relative difference between two values relative to their average — used when neither value is the baseline.
How do I find what percentage X is of Y?+
Divide X by Y and multiply by 100. (X ÷ Y) × 100. For example, 50 out of 200 = (50 ÷ 200) × 100 = 25%.
What is a percentage point vs a percentage?+
A percentage point is the arithmetic difference between two percentages. If a rate goes from 10% to 15%, it increased by 5 percentage points, but by 50% (5/10 × 100) in percentage terms.