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 ?



Rounding


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 = 3.1 X = 71 X = 121 X = 221
P=5%5% of 3.15% of 715% of 1215% of 221
P=10%10% of 3.110% of 7110% of 12110% of 221
P=15%15% of 3.115% of 7115% of 12115% of 221
P=20%20% of 3.120% of 7120% of 12120% of 221
P=25%25% of 3.125% of 7125% of 12125% of 221
P=30%30% of 3.130% of 7130% of 12130% of 221
P=35%35% of 3.135% of 7135% of 12135% of 221
P=40%40% of 3.140% of 7140% of 12140% of 221
P=45%45% of 3.145% of 7145% of 12145% of 221
P=50%50% of 3.150% of 7150% of 12150% of 221
P=55%55% of 3.155% of 7155% of 12155% of 221
P=60%60% of 3.160% of 7160% of 12160% of 221
P=65%65% of 3.165% of 7165% of 12165% of 221
P=70%70% of 3.170% of 7170% of 12170% of 221
P=75%75% of 3.175% of 7175% of 12175% of 221
P=80%80% of 3.180% of 7180% of 12180% of 221
P=85%85% of 3.185% of 7185% of 12185% of 221
P=90%90% of 3.190% of 7190% of 12190% of 221
P=95%95% of 3.195% of 7195% of 12195% of 221
P=100%100% of 3.1100% of 71100% of 121100% of 221

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 = 3.1 Y = 41 Y = 71 Y = 121 Y = 221
X=55 is what % of 3.15 is what % of 415 is what % of 715 is what % of 1215 is what % of 221
X=1010 is what % of 3.110 is what % of 4110 is what % of 7110 is what % of 12110 is what % of 221
X=1515 is what % of 3.115 is what % of 4115 is what % of 7115 is what % of 12115 is what % of 221
X=2020 is what % of 3.120 is what % of 4120 is what % of 7120 is what % of 12120 is what % of 221
X=2525 is what % of 3.125 is what % of 4125 is what % of 7125 is what % of 12125 is what % of 221
X=3030 is what % of 3.130 is what % of 4130 is what % of 7130 is what % of 12130 is what % of 221
X=3535 is what % of 3.135 is what % of 4135 is what % of 7135 is what % of 12135 is what % of 221
X=4040 is what % of 3.140 is what % of 4140 is what % of 7140 is what % of 12140 is what % of 221
X=4545 is what % of 3.145 is what % of 4145 is what % of 7145 is what % of 12145 is what % of 221
X=5050 is what % of 3.150 is what % of 4150 is what % of 7150 is what % of 12150 is what % of 221
X=5555 is what % of 3.155 is what % of 4155 is what % of 7155 is what % of 12155 is what % of 221
X=6060 is what % of 3.160 is what % of 4160 is what % of 7160 is what % of 12160 is what % of 221
X=6565 is what % of 3.165 is what % of 4165 is what % of 7165 is what % of 12165 is what % of 221
X=7070 is what % of 3.170 is what % of 4170 is what % of 7170 is what % of 12170 is what % of 221
X=7575 is what % of 3.175 is what % of 4175 is what % of 7175 is what % of 12175 is what % of 221
X=8080 is what % of 3.180 is what % of 4180 is what % of 7180 is what % of 12180 is what % of 221
X=8585 is what % of 3.185 is what % of 4185 is what % of 7185 is what % of 12185 is what % of 221
X=9090 is what % of 3.190 is what % of 4190 is what % of 7190 is what % of 12190 is what % of 221
X=9595 is what % of 3.195 is what % of 4195 is what % of 7195 is what % of 12195 is what % of 221
X=100100 is what % of 3.1100 is what % of 41100 is what % of 71100 is what % of 121100 is what % of 221

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 = 3.1 Y = 71 Y = 221 Y = 521 Y = 1021
X = 1010 to 3.110 to 7110 to 22110 to 52110 to 1021
X = 2020 to 3.120 to 7120 to 22120 to 52120 to 1021
X = 3030 to 3.130 to 7130 to 22130 to 52130 to 1021
X = 4040 to 3.140 to 7140 to 22140 to 52140 to 1021
X = 5050 to 3.150 to 7150 to 22150 to 52150 to 1021
X = 6060 to 3.160 to 7160 to 22160 to 52160 to 1021
X = 7070 to 3.170 to 7170 to 22170 to 52170 to 1021
X = 8080 to 3.180 to 7180 to 22180 to 52180 to 1021
X = 9090 to 3.190 to 7190 to 22190 to 52190 to 1021
X = 100100 to 3.1100 to 71100 to 221100 to 521100 to 1021
X = 110110 to 3.1110 to 71110 to 221110 to 521110 to 1021
X = 120120 to 3.1120 to 71120 to 221120 to 521120 to 1021
X = 130130 to 3.1130 to 71130 to 221130 to 521130 to 1021
X = 140140 to 3.1140 to 71140 to 221140 to 521140 to 1021
X = 150150 to 3.1150 to 71150 to 221150 to 521150 to 1021
X = 160160 to 3.1160 to 71160 to 221160 to 521160 to 1021
X = 170170 to 3.1170 to 71170 to 221170 to 521170 to 1021
X = 180180 to 3.1180 to 71180 to 221180 to 521180 to 1021
X = 190190 to 3.1190 to 71190 to 221190 to 521190 to 1021
X = 200200 to 3.1200 to 71200 to 221200 to 521200 to 1021
Percentage Calculator Online