Calculators
Free Percentage Calculator
Find a percentage of a number, work out a share or see how much a number has changed.
Private by default — your numbers stay on your device.
Use a dot for decimals, such as 12.5.
Result
Updates as you enter numbers.
Three common percentage questions
To find 20% of 150, choose the first option and enter 20 and 150. To see what percent 30 is of 150, choose the second option. To compare 100 with 120, choose percentage change: the result is a 20% increase.
How the change is calculated
Percentage change compares the difference with the original positive number. A negative result means a decrease. The starting number must be greater than zero. Calculations happen in your browser; TestiFollow does not send or save your numbers.
Frequently asked questions
How do I find a percentage of a number?
Enter the percentage in the first box and the number in the second. For example, 10% of 200 is 20.
Can I calculate a percentage decrease?
Yes. Choose Percentage increase or decrease, then enter the original and new numbers. A negative result shows a decrease.
Are my numbers saved?
No. They stay in this browser page and are cleared when you leave.