Utilitiz›Percentage Calculator

Percentage Calculator

Work out percentages, percentage change, and add or subtract percentages instantly.

What is X% of Y?

What is % of?

X is what % of Y?

is what % of?

Percentage change

From to

Add / subtract a percentage

%

What is the Percentage Calculator?

A straightforward percentage calculator with four common calculation modes. Work out what percentage one number is of another, calculate percentage change between two values, find what X% of Y is, or add and subtract a percentage from a number. All calculations happen instantly as you type.

When would you use it?

VAT and tax calculations

Add 20% VAT to a price, or work out the pre-VAT price from a VAT-inclusive total using the subtract percentage mode.

Discounts and sale prices

Calculate how much you save on a discounted item — enter the original price and subtract the discount percentage.

Salary and pay rises

Work out what a 5% pay rise adds to your salary, or calculate what percentage increase you received.

Exam and test scores

Find out what percentage you scored — enter your mark and the total available marks into the X is what % of Y calculator.

Statistics and data

Calculate percentage change between two data points — useful for comparing figures across time periods in reports or presentations.

Frequently asked questions

Use the Add percentage mode. Enter your pre-VAT price, select add, enter 20 (for 20% UK standard rate) and the result shows the VAT-inclusive price.
Use the Subtract percentage mode in reverse — enter the sale price and subtract the discount percentage to see approximately what the original was. For exact reverse calculations, divide the sale price by (1 minus the discount rate).
Percentage change shows how much a value has increased or decreased relative to its original value, expressed as a percentage. A value going from 80 to 100 is a 25% increase.
Results are calculated to 6 significant figures, which is more than sufficient for everyday use.

Percentage change

Shows whether a value increased or decreased and by how much, as a percentage.

Common uses

VAT, discounts, salary increases, exam scores, tips, and statistical analysis.

100% private

All calculations happen instantly in your browser. Nothing is sent anywhere.