Percentage Calculator

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


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.

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 = 10 X = 50 X = 100 X = 200 X = 1000
P=5%5% of 105% of 505% of 1005% of 2005% of 1000
P=10%10% of 1010% of 5010% of 10010% of 20010% of 1000
P=15%15% of 1015% of 5015% of 10015% of 20015% of 1000
P=20%20% of 1020% of 5020% of 10020% of 20020% of 1000
P=25%25% of 1025% of 5025% of 10025% of 20025% of 1000
P=30%30% of 1030% of 5030% of 10030% of 20030% of 1000
P=35%35% of 1035% of 5035% of 10035% of 20035% of 1000
P=40%40% of 1040% of 5040% of 10040% of 20040% of 1000
P=45%45% of 1045% of 5045% of 10045% of 20045% of 1000
P=50%50% of 1050% of 5050% of 10050% of 20050% of 1000
P=55%55% of 1055% of 5055% of 10055% of 20055% of 1000
P=60%60% of 1060% of 5060% of 10060% of 20060% of 1000
P=65%65% of 1065% of 5065% of 10065% of 20065% of 1000
P=70%70% of 1070% of 5070% of 10070% of 20070% of 1000
P=75%75% of 1075% of 5075% of 10075% of 20075% of 1000
P=80%80% of 1080% of 5080% of 10080% of 20080% of 1000
P=85%85% of 1085% of 5085% of 10085% of 20085% of 1000
P=90%90% of 1090% of 5090% of 10090% of 20090% of 1000
P=95%95% of 1095% of 5095% of 10095% of 20095% of 1000
P=100%100% of 10100% of 50100% of 100100% of 200100% of 1000

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 = 10 Y = 20 Y = 50 Y = 100 Y = 200
X=55 is what % of 105 is what % of 205 is what % of 505 is what % of 1005 is what % of 200
X=1010 is what % of 1010 is what % of 2010 is what % of 5010 is what % of 10010 is what % of 200
X=1515 is what % of 1015 is what % of 2015 is what % of 5015 is what % of 10015 is what % of 200
X=2020 is what % of 1020 is what % of 2020 is what % of 5020 is what % of 10020 is what % of 200
X=2525 is what % of 1025 is what % of 2025 is what % of 5025 is what % of 10025 is what % of 200
X=3030 is what % of 1030 is what % of 2030 is what % of 5030 is what % of 10030 is what % of 200
X=3535 is what % of 1035 is what % of 2035 is what % of 5035 is what % of 10035 is what % of 200
X=4040 is what % of 1040 is what % of 2040 is what % of 5040 is what % of 10040 is what % of 200
X=4545 is what % of 1045 is what % of 2045 is what % of 5045 is what % of 10045 is what % of 200
X=5050 is what % of 1050 is what % of 2050 is what % of 5050 is what % of 10050 is what % of 200
X=5555 is what % of 1055 is what % of 2055 is what % of 5055 is what % of 10055 is what % of 200
X=6060 is what % of 1060 is what % of 2060 is what % of 5060 is what % of 10060 is what % of 200
X=6565 is what % of 1065 is what % of 2065 is what % of 5065 is what % of 10065 is what % of 200
X=7070 is what % of 1070 is what % of 2070 is what % of 5070 is what % of 10070 is what % of 200
X=7575 is what % of 1075 is what % of 2075 is what % of 5075 is what % of 10075 is what % of 200
X=8080 is what % of 1080 is what % of 2080 is what % of 5080 is what % of 10080 is what % of 200
X=8585 is what % of 1085 is what % of 2085 is what % of 5085 is what % of 10085 is what % of 200
X=9090 is what % of 1090 is what % of 2090 is what % of 5090 is what % of 10090 is what % of 200
X=9595 is what % of 1095 is what % of 2095 is what % of 5095 is what % of 10095 is what % of 200
X=100100 is what % of 10100 is what % of 20100 is what % of 50100 is what % of 100100 is what % of 200

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 = 10 Y = 50 Y = 200 Y = 500 Y = 1000
X = 1010 to 1010 to 5010 to 20010 to 50010 to 1000
X = 2020 to 1020 to 5020 to 20020 to 50020 to 1000
X = 3030 to 1030 to 5030 to 20030 to 50030 to 1000
X = 4040 to 1040 to 5040 to 20040 to 50040 to 1000
X = 5050 to 1050 to 5050 to 20050 to 50050 to 1000
X = 6060 to 1060 to 5060 to 20060 to 50060 to 1000
X = 7070 to 1070 to 5070 to 20070 to 50070 to 1000
X = 8080 to 1080 to 5080 to 20080 to 50080 to 1000
X = 9090 to 1090 to 5090 to 20090 to 50090 to 1000
X = 100100 to 10100 to 50100 to 200100 to 500100 to 1000
X = 110110 to 10110 to 50110 to 200110 to 500110 to 1000
X = 120120 to 10120 to 50120 to 200120 to 500120 to 1000
X = 130130 to 10130 to 50130 to 200130 to 500130 to 1000
X = 140140 to 10140 to 50140 to 200140 to 500140 to 1000
X = 150150 to 10150 to 50150 to 200150 to 500150 to 1000
X = 160160 to 10160 to 50160 to 200160 to 500160 to 1000
X = 170170 to 10170 to 50170 to 200170 to 500170 to 1000
X = 180180 to 10180 to 50180 to 200180 to 500180 to 1000
X = 190190 to 10190 to 50190 to 200190 to 500190 to 1000
X = 200200 to 10200 to 50200 to 200200 to 500200 to 1000
Percentage Calculator Online