Welcome to Percentage Calculator

Welcome to Percentage Calculator! We have created this site as on online resource for anyone who wants to use it to help work out percentage problems. There are a lot of common percentage questions and problems people seem to encounter and we felt that we could make a good resource to give some assistance. This site gives everyone access to a free online calculator where you can change percentages and amounts and see the formula and workings behind the results that are shown.

The two percentage calculators below allow you to find what a set percentage of an amount is and also to work out what percentage an amount is from a total. Under each calculator there is a section to explain how to work these amounts out. It is quite easy to work out these percentages as you will see, remembering a couple of basic principles is all you need to know to be able to find the answers whenever you need.

In the menu above you will find links to some other standard percentage queries with their own calculators and explanations. If you have any suggestions or need any other help at all just let us know via the contact form in the menus.

Calculate the value of a percentage of an amount

How to work out the value of a percentage of an amount

The method to calculate what the value of a set percentage (A) is of an amount (B) can be completed like this:

Find out what 1% of the the the whole amount (B) is - to do this you divide it by 100.
Once you know the value of 1% you can multiply this amount by the number of percent you want to find.
If you want to find 10% of 50 you divide 50 by 100.
From this you know that 1% of 50 is 0.5
So to find 10% you just multiply 0.5 by 10
0.5 x 10 = 5
10% of 50 = 5

When working out what the value of a set percentage (A) is of an amount (B) you just need to remember that B is the whole amount - it is 100%. So to find 1% you just divide it by 100. Once you have the value of 1% you can multiply it by the number of percent you want to find.

With the figures above you would do the following:
(90 / 100) x 6 = 5.4

Calculate what percentage an amount is

How to work out what percentage an amount is

To work out what the percentage value an amount (A) is of another amount (B) you can do it this way:

The amount B is the full amount - it is 100%.
Dividing the value you want show as a percentage by the total will give you a decimal version of the percentage.
Multiplying the decimal value by 100 will show it as a percentage.

It is helpful to think of an easy example to make sure you get the division the right way around. If you want to work out what percentage 1 is of 100 then dividing 100 by 1 would give you 100 so that is the wrong way! Dividing 1 by 100 gives the decimal representation of 1%:

1 ÷ 100 = 0.01

When you multiply this by 100 you are back to 1 - 1% of 100 = 1.

With the figures in the calc above you would do the following:
(60 / 240) x 100 = 25%