Percentage Calculator

Percentage Calculator is a super easy to use & free online tool to calculate percentages.

What is % of ?

is what % of ?

What is the % increase/decrease
from to ?




How shall I use the Percentage Calculator?

The use of the Percentage Calculator is very straightforward: Enter the missing values, then click on the = button. You will see the results of the percentage calculation immediately. PercentageCalc.org helps you to run the three most common percentage calculations quickly and easily.

You can also download our Percentage Calculator in Excel.

What is percentage?

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%". A percentage is a dimensionless number; it has no unit of measurement. Percentages are often used to express a proportionate part of a total.

You can convert percent to fraction and also to decimal very easily. For example: \(75\%\) = \(75 \over 100 \) = \(0.75\)

How is percentage calculated?

It depends on the subject, more precisely on the thing you would like to calculate. There are several formulas for percentage calculations. The website PercentageCalc.org contains the three most common calculations. You will find their detailed description below. These formulae are:

1. Percentage of a value calculation -> What is P percent of X

2. Percentage calculation -> X is what percent of Y

3. Percentage change calculation -> Find the percentage change from X to Y

1. Percentage of a value calculation

This might be the most common case: You would like to calculate a certain percentage of something. To put it in another way, you would like to know what P per cent of X is. For example, you would like to know what 20 percent of 80 dollars is.

We use the following formula: \(\text{Percentage of a value} = X \cdot P\%\)

The calculation is as follows: \(80\cdot20\%\) = \(80\cdot{20 \over 100}\) = \(80\cdot0.2\) = \(16\).

Percentage Calculator Examples: Percentage of a value calculation

What is P% of X? X = 2.1 X = 61 X = 111 X = 211
P=5%5% of 2.15% of 615% of 1115% of 211
P=10%10% of 2.110% of 6110% of 11110% of 211
P=15%15% of 2.115% of 6115% of 11115% of 211
P=20%20% of 2.120% of 6120% of 11120% of 211
P=25%25% of 2.125% of 6125% of 11125% of 211
P=30%30% of 2.130% of 6130% of 11130% of 211
P=35%35% of 2.135% of 6135% of 11135% of 211
P=40%40% of 2.140% of 6140% of 11140% of 211
P=45%45% of 2.145% of 6145% of 11145% of 211
P=50%50% of 2.150% of 6150% of 11150% of 211
P=55%55% of 2.155% of 6155% of 11155% of 211
P=60%60% of 2.160% of 6160% of 11160% of 211
P=65%65% of 2.165% of 6165% of 11165% of 211
P=70%70% of 2.170% of 6170% of 11170% of 211
P=75%75% of 2.175% of 6175% of 11175% of 211
P=80%80% of 2.180% of 6180% of 11180% of 211
P=85%85% of 2.185% of 6185% of 11185% of 211
P=90%90% of 2.190% of 6190% of 11190% of 211
P=95%95% of 2.195% of 6195% of 11195% of 211
P=100%100% of 2.1100% of 61100% of 111100% of 211

2. Percentage calculation

In this case you would like to know that X what percent of Y is? For example, you know that you have 20 apples left out of 80 apples. What percent of 80 apples is 20 apples then?

We use the following formula: \(\text{Percentage calculation} = {X \over Y}\)

The calculation is as follows: \({20\over80}\) = \(0.25\) = \(25\%\)

Percentage Calculator Examples: Percentage calculation

X is what % of Y? Y = 2.1 Y = 31 Y = 61 Y = 111 Y = 211
X=55 is what % of 2.15 is what % of 315 is what % of 615 is what % of 1115 is what % of 211
X=1010 is what % of 2.110 is what % of 3110 is what % of 6110 is what % of 11110 is what % of 211
X=1515 is what % of 2.115 is what % of 3115 is what % of 6115 is what % of 11115 is what % of 211
X=2020 is what % of 2.120 is what % of 3120 is what % of 6120 is what % of 11120 is what % of 211
X=2525 is what % of 2.125 is what % of 3125 is what % of 6125 is what % of 11125 is what % of 211
X=3030 is what % of 2.130 is what % of 3130 is what % of 6130 is what % of 11130 is what % of 211
X=3535 is what % of 2.135 is what % of 3135 is what % of 6135 is what % of 11135 is what % of 211
X=4040 is what % of 2.140 is what % of 3140 is what % of 6140 is what % of 11140 is what % of 211
X=4545 is what % of 2.145 is what % of 3145 is what % of 6145 is what % of 11145 is what % of 211
X=5050 is what % of 2.150 is what % of 3150 is what % of 6150 is what % of 11150 is what % of 211
X=5555 is what % of 2.155 is what % of 3155 is what % of 6155 is what % of 11155 is what % of 211
X=6060 is what % of 2.160 is what % of 3160 is what % of 6160 is what % of 11160 is what % of 211
X=6565 is what % of 2.165 is what % of 3165 is what % of 6165 is what % of 11165 is what % of 211
X=7070 is what % of 2.170 is what % of 3170 is what % of 6170 is what % of 11170 is what % of 211
X=7575 is what % of 2.175 is what % of 3175 is what % of 6175 is what % of 11175 is what % of 211
X=8080 is what % of 2.180 is what % of 3180 is what % of 6180 is what % of 11180 is what % of 211
X=8585 is what % of 2.185 is what % of 3185 is what % of 6185 is what % of 11185 is what % of 211
X=9090 is what % of 2.190 is what % of 3190 is what % of 6190 is what % of 11190 is what % of 211
X=9595 is what % of 2.195 is what % of 3195 is what % of 6195 is what % of 11195 is what % of 211
X=100100 is what % of 2.1100 is what % of 31100 is what % of 61100 is what % of 111100 is what % of 211

3. Percentage change calculation

Percentage change calculation is used to determine the change between the start value and the end value. This formula also helps you to decide whether you can talk about an increase or a decrease. For example, the price of a product changed from 200 to 300. What percentage change could it mean?

We use the following formula: \(\text{Percentage change}\) = \({(\text{End Value} - \text{Start Value})\over\text{Start Value}}\) \(\cdot 100\%\)

The calculation is as follows: \({(350-200) \over 200} \cdot 100\%\) = \({150 \over 200} \cdot 100\%\) = \(0.75 \cdot 100\%\)= \(75\%\)

The result of this type of calculation can be positive or negative. If the result is positive, it is called percentage increase (just like in our example above). If the result is positive, it is called percentage decrease.

Percentage Calculator Examples: Percentage change calculation

What is the % increase/decrease
from X to Y ?

X to Y Y = 2.1 Y = 61 Y = 211 Y = 511 Y = 1011
X = 1010 to 2.110 to 6110 to 21110 to 51110 to 1011
X = 2020 to 2.120 to 6120 to 21120 to 51120 to 1011
X = 3030 to 2.130 to 6130 to 21130 to 51130 to 1011
X = 4040 to 2.140 to 6140 to 21140 to 51140 to 1011
X = 5050 to 2.150 to 6150 to 21150 to 51150 to 1011
X = 6060 to 2.160 to 6160 to 21160 to 51160 to 1011
X = 7070 to 2.170 to 6170 to 21170 to 51170 to 1011
X = 8080 to 2.180 to 6180 to 21180 to 51180 to 1011
X = 9090 to 2.190 to 6190 to 21190 to 51190 to 1011
X = 100100 to 2.1100 to 61100 to 211100 to 511100 to 1011
X = 110110 to 2.1110 to 61110 to 211110 to 511110 to 1011
X = 120120 to 2.1120 to 61120 to 211120 to 511120 to 1011
X = 130130 to 2.1130 to 61130 to 211130 to 511130 to 1011
X = 140140 to 2.1140 to 61140 to 211140 to 511140 to 1011
X = 150150 to 2.1150 to 61150 to 211150 to 511150 to 1011
X = 160160 to 2.1160 to 61160 to 211160 to 511160 to 1011
X = 170170 to 2.1170 to 61170 to 211170 to 511170 to 1011
X = 180180 to 2.1180 to 61180 to 211180 to 511180 to 1011
X = 190190 to 2.1190 to 61190 to 211190 to 511190 to 1011
X = 200200 to 2.1200 to 61200 to 211200 to 511200 to 1011
Percentage Calculator Online