Tools · Calculators
Percentage Calculator
Each section is independent. Results update as you type. Division by zero is blocked with a plain-language message.
What is X% of Y?
Result: 100
X is what percentage of Y?
Result: 25%
Percentage increase
Result: 25%
Percentage decrease
Result: 20%
Percentage difference
Result: 40%
Numbers are processed in this session and are not stored.
What is a percentage calculator?
It answers the usual percent questions: a share of a total, a change between two numbers, and how far apart two numbers are.
How to use it
- Pick the section that matches your question.
- Enter the two numbers.
- Read the result under that section.
FAQ
What if I enter 0?
Finding “what percent” or a change from 0 is not defined. The tool explains that instead of showing an error code.
How is percentage difference different from increase?
Increase compares the change to the starting value. Difference compares the gap to the average of both values.
Read the original guide: Work out the percent without the wrong formula.