Percentage calculator
Six calculations on one page: share, percentage, change, discount, mark-up and original value. The result appears as soon as both numbers are entered.
Runs only in your browser.
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What is x % of y?
What percentage of y is x?
By what percentage does a value change?
Price after discount
Price with mark-up
Original value before discount or mark-up
Frequently asked questions
How do I reverse a discount?
By dividing, not by adding: 80 francs after a 20 % discount was 80 ÷ 0.8 = 100 francs. 80 plus 20 % would only give 96. The “Original value” calculator does this for you.
Percent or percentage points?
If an interest rate rises from 2 % to 3 %, that is one percentage point more, but 50 % more. The “Change” calculator shows the second figure.
How do I enter numbers?
However you’re used to: 1’234.50, 1'234.50, 1234,50 or 1 234.5. Both point and comma count as the decimal separator.