Percentage calculator
Calculate a percentage of a value.
Percentage calculator
Your result appears here
Adjust the values to see your result automatically.
Com utilitzar Percentage calculator
The Percentage calculator takes a percentage and a value and returns the answer for one of five operations: percent of a value, what percent one value is of another, reverse percentage, percentage change or percentage difference. Each result shows the exact formula used, and the tool explains why percentage change and percentage difference use different denominators.
- Adjust the values; an initial result is calculated from the defaults.
- Change the basic settings or open Advanced mode to fine-tune the result.
- Review and copy or download your result. Pause Live results to run manually. Sources or individual settings above 20,000 characters require an explicit run.
Què admet aquesta eina
Calculate a percentage of a value.
- Operation
- Percent of value · Value is what percent · Reverse percentage · Percentage change · Percentage difference
- Percentage
- Set this value for your task.
- Value
- Set this value for your task.
Límits i processament
Use finite numbers, valid dates and the ranges shown by each control. Invalid values produce an error without a downloadable result.
Preguntes freqüents
How do I find the original number before a percentage was taken?
Choose Reverse percentage. If the value is a known percentage of an unknown whole, the calculator returns value × 100 / percentage. For example, 30 entered as 15% of a whole gives an original value of 200. A percentage of zero returns an error.
What is the difference between percentage change and percentage difference?
Percentage change divides the difference by the absolute original value: (new − original) / |original| × 100. Percentage difference is symmetric and divides the absolute difference by the average of both absolute values. The calculator offers both as separate operations and labels the denominator it used.
How do I calculate what percent one number is of another?
Select Value is what percent, enter the whole in the Percentage field and the part in the Value field. The result is value / whole × 100, so 50 of 200 is 25%. A whole of zero is rejected because the percentage would be undefined.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Use finite numbers, valid dates and the ranges shown by each control. Invalid values produce an error without a downloadable result.