Three simple steps
How to use the Percentage Calculator
- 01
Choose the percentage calculation you need.
- 02
Enter both values in the clearly labelled fields.
- 03
Read the instant result and the formula used below it.
Everyday calculator
Percentage Calculator
Find a percentage of a number, work out what percentage one value is of another, or calculate an increase and decrease instantly.
Instant calculation Runs in your browser
Results update automatically as you type.
Your result
30150 × 20 ÷ 100
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Worked example
What is 20% of €75?
Calculation75 × 20 ÷ 100
Result€15
The method
How it works
Percentage of a number
Multiply the number by the percentage and divide by 100. For example, 15% of 80 is 80 × 15 ÷ 100.
One number as a percentage
Divide the first value by the second, then multiply by 100. This shows the first value's share of the whole.
Percentage change
Subtract the original value from the new value, divide by the original value, then multiply by 100.
Helpful answers
Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage, then divide the result by 100. Kitalva performs that calculation as soon as both values are entered.
Can the result be negative?
Yes. A negative input or a decrease below the original value can produce a negative result. The sign is kept so the result stays mathematically accurate.
What is the difference between percentage and percentage points?
Percentage change compares values proportionally. Percentage points describe the direct difference between two percentages, such as the change from 20% to 25% being 5 percentage points.