This free service allows you to calculate percentages

Convert a percentage to a number

What is % of   ?

Convert a number to a percentage

is what percent
of ?

Percentage increase / decrease

= which value?

Percentage change between two values

The change between  
and = which percentage?

How to use our calculator

You find here several easy percentage calculators with examples. You can use our easy percent calculators to compute percentages. You can use comma or dot as a decimal separator. You don't have to use thousands separators because this calculator treats both comma and dot as a decimal separator. In order to calculate percentages online, click the button. The result appears on the next page. If there are errors, the result field will be empty. Try this handy online tool to check your problems on percentages. Find the percentage change between two numbers or calculate a percent of a value before and after. Our purpose is to offer the best online percentage calculator with fast and useful answers. Whenever you need to calculate percentages or find out how to calculate a percentage, this free website will help you. We hope that you enjoy the time you spend on the website. Please feel free to send us your comments or suggestions.

A few easy examples

Example one

60% of 900 = ???

(900/100) x 60 = 540

First we check how much is one percent: we divide 900 by 100. We get 9.
Then we multiply one percent by 60 (60% = 60 per hundred = 60 percent) so 9 x 60 = 540.

Example two

90 = ??? % of 125

90 x (100/125) = 72 %

First we calculate how much is one unit: we divide 125 by 100.
Then we multiply one unit by 90 because we want to know how much is 90 units.
In this way we calculate the percentage.

Example three

What is the % change from 150 to 190?

(190-150) x (100/150) = 26.66 %

150 represents 100%. So the percent of one unit is represented by 100/150.
190-150 is 40. So 40 units present 40 x (100/150) = 26.66 %
In this way we calculate the percentage increase or decrease.

What are percentages?

One percent is one hundredth. We use a % to indicate it. So 5 percent is the same as 5%, 0.05, 5/100 or five hundredths. It is that simple! That is nice, but we usually do not only use percentages. Sometimes we want to show the ratio between 2 numbers. For example: what is 40% of 20? That's 40 hundredths of 20, so if we share 20 cookies in 100 equal pieces (good luck with that!), 40 of those pieces are our 40% of 20 cookies. Let's count: 40/100 * 20 = 8. A little trick does apply here: if you want to divide by a hundred, just move the comma two places to the left. In our calculation, 40/100 * 20 we could also do so: (40 * 20) / 100 (it is the same). 40 * 20 is 800. Move the comma in 800 2 places to the left and you get 8.00. Enter these values at the top of the page, 40 and 20. Then you get "40% of 20 is 8". In another case you want to indicate, for example, how many percent a number has descended or increased. For example, if you have 10 apples and you eat 2 of them ... Then you have lost 20% apples. Why? Because 8 is 80% of 10. All apples were 100%, now we still have 80%, so the number of apples has descended by 20% (because 100 - 80 = 20). Use our percent increase tool for this.


The term percent comes from the Latin per center (per hundred) and is indicated by the sign "%" , or simply "pct" or "percent". In mathematics, a percentage is a number in the fraction of 100. American people say percent, British people prefer to use per cent.

Percentages for solutions

A percent does not always have to indicate a few hundredths of the whole. This way, solutions are also shown in percentages. A physiological salt solution is, for example, referred to as a solution of 0.9% kitchen salt. This 0.9% means that the solution contains 0.9 grams of salt per 100 mL (= 100 grams). The percentage here therefore refers to the weight. The volume percentage often states the addition: "vol", then we get for example: 14% vol or 14 vol%.

Percentage points

A percentage point, also written as %-point, is used to indicate the absolute difference between values expressed as a percentage. A percent is therefore a hundredth part, while a percentage point is a unit of account that expresses the change of a percentage.

An example

If the interest on your savings account rises from 2% to 3%, you can express this as "an increase of 50% of the old interest rate", or as "an increase of 1 percentage point" (which is 1% of the whole). An "increase of 1%" is not clear, because it could indicate an increase of 1% of 2 (0.02) which brings the total to 2.02% instead of 3%.

Per mille

1 per mille is 1 thousandth part, the word per mille also means "per thousand". A per mille is noted as ‰, such as the percent (%) but with 3 "zeros" instead of 2. Here, 1 per mille = 0.1%. For more information click here: