Calculations
What percentage is X of Y?
of
is
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What is X% of Y?
% of
is
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How much did X change compared to Y?
vs
is
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FAQ
Yes. All calculations update as you type. There is no “calculate” button, keeping everything
quick, clean, and effortless.
When a value would produce an invalid calculation—such as dividing by zero—the related input
field becomes gently highlighted after a short delay. This helps prevent mistakes without
interrupting your typing flow.
Simply click or tap any result box. The value is copied instantly to your clipboard, ready
to be pasted wherever you need it.
Yes. The calculator fully supports large numbers and decimal values. Thousands are formatted
automatically as you type or paste them, keeping results clear and easy to read.
This calculation shows how much X represents out of Y, expressed as a percentage. It is often
used to compare values, measure progress, or understand proportions.
This operation tells you the exact amount represented by a percentage of a number. It is useful
for discounts, taxes, tips, increases, and many everyday calculations.
Percentage change measures how much a value has increased or decreased relative to the original
number.
It is calculated by subtracting the old value from the new value, dividing the result by the
absolute value of the old number, and multiplying by 100.
A dash appears whenever a calculation cannot be completed—for example, if one or both fields
are empty, or if the input would create a mathematically invalid result.
Many real-world values include decimals or fall below zero. Allowing these inputs ensures that
the calculator remains accurate and useful in all scenarios, not only whole numbers.
Automatic formatting improves readability and reduces mistakes when working with large numbers.
The formatting does not affect the calculation—it only makes the input clearer.
Yes. The tool works well for common financial tasks such as interest, discounts, markups,
growth percentages, and comparisons. It provides precise results instantly.
No. All calculations happen directly in your browser. Nothing is saved, sent, or processed
on a server, ensuring full privacy and security.