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 = 1.8 X = 58 X = 108 X = 208
P=5%5% of 1.85% of 585% of 1085% of 208
P=10%10% of 1.810% of 5810% of 10810% of 208
P=15%15% of 1.815% of 5815% of 10815% of 208
P=20%20% of 1.820% of 5820% of 10820% of 208
P=25%25% of 1.825% of 5825% of 10825% of 208
P=30%30% of 1.830% of 5830% of 10830% of 208
P=35%35% of 1.835% of 5835% of 10835% of 208
P=40%40% of 1.840% of 5840% of 10840% of 208
P=45%45% of 1.845% of 5845% of 10845% of 208
P=50%50% of 1.850% of 5850% of 10850% of 208
P=55%55% of 1.855% of 5855% of 10855% of 208
P=60%60% of 1.860% of 5860% of 10860% of 208
P=65%65% of 1.865% of 5865% of 10865% of 208
P=70%70% of 1.870% of 5870% of 10870% of 208
P=75%75% of 1.875% of 5875% of 10875% of 208
P=80%80% of 1.880% of 5880% of 10880% of 208
P=85%85% of 1.885% of 5885% of 10885% of 208
P=90%90% of 1.890% of 5890% of 10890% of 208
P=95%95% of 1.895% of 5895% of 10895% of 208
P=100%100% of 1.8100% of 58100% of 108100% of 208

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 = 1.8 Y = 28 Y = 58 Y = 108 Y = 208
X=55 is what % of 1.85 is what % of 285 is what % of 585 is what % of 1085 is what % of 208
X=1010 is what % of 1.810 is what % of 2810 is what % of 5810 is what % of 10810 is what % of 208
X=1515 is what % of 1.815 is what % of 2815 is what % of 5815 is what % of 10815 is what % of 208
X=2020 is what % of 1.820 is what % of 2820 is what % of 5820 is what % of 10820 is what % of 208
X=2525 is what % of 1.825 is what % of 2825 is what % of 5825 is what % of 10825 is what % of 208
X=3030 is what % of 1.830 is what % of 2830 is what % of 5830 is what % of 10830 is what % of 208
X=3535 is what % of 1.835 is what % of 2835 is what % of 5835 is what % of 10835 is what % of 208
X=4040 is what % of 1.840 is what % of 2840 is what % of 5840 is what % of 10840 is what % of 208
X=4545 is what % of 1.845 is what % of 2845 is what % of 5845 is what % of 10845 is what % of 208
X=5050 is what % of 1.850 is what % of 2850 is what % of 5850 is what % of 10850 is what % of 208
X=5555 is what % of 1.855 is what % of 2855 is what % of 5855 is what % of 10855 is what % of 208
X=6060 is what % of 1.860 is what % of 2860 is what % of 5860 is what % of 10860 is what % of 208
X=6565 is what % of 1.865 is what % of 2865 is what % of 5865 is what % of 10865 is what % of 208
X=7070 is what % of 1.870 is what % of 2870 is what % of 5870 is what % of 10870 is what % of 208
X=7575 is what % of 1.875 is what % of 2875 is what % of 5875 is what % of 10875 is what % of 208
X=8080 is what % of 1.880 is what % of 2880 is what % of 5880 is what % of 10880 is what % of 208
X=8585 is what % of 1.885 is what % of 2885 is what % of 5885 is what % of 10885 is what % of 208
X=9090 is what % of 1.890 is what % of 2890 is what % of 5890 is what % of 10890 is what % of 208
X=9595 is what % of 1.895 is what % of 2895 is what % of 5895 is what % of 10895 is what % of 208
X=100100 is what % of 1.8100 is what % of 28100 is what % of 58100 is what % of 108100 is what % of 208

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 = 1.8 Y = 58 Y = 208 Y = 508 Y = 1008
X = 1010 to 1.810 to 5810 to 20810 to 50810 to 1008
X = 2020 to 1.820 to 5820 to 20820 to 50820 to 1008
X = 3030 to 1.830 to 5830 to 20830 to 50830 to 1008
X = 4040 to 1.840 to 5840 to 20840 to 50840 to 1008
X = 5050 to 1.850 to 5850 to 20850 to 50850 to 1008
X = 6060 to 1.860 to 5860 to 20860 to 50860 to 1008
X = 7070 to 1.870 to 5870 to 20870 to 50870 to 1008
X = 8080 to 1.880 to 5880 to 20880 to 50880 to 1008
X = 9090 to 1.890 to 5890 to 20890 to 50890 to 1008
X = 100100 to 1.8100 to 58100 to 208100 to 508100 to 1008
X = 110110 to 1.8110 to 58110 to 208110 to 508110 to 1008
X = 120120 to 1.8120 to 58120 to 208120 to 508120 to 1008
X = 130130 to 1.8130 to 58130 to 208130 to 508130 to 1008
X = 140140 to 1.8140 to 58140 to 208140 to 508140 to 1008
X = 150150 to 1.8150 to 58150 to 208150 to 508150 to 1008
X = 160160 to 1.8160 to 58160 to 208160 to 508160 to 1008
X = 170170 to 1.8170 to 58170 to 208170 to 508170 to 1008
X = 180180 to 1.8180 to 58180 to 208180 to 508180 to 1008
X = 190190 to 1.8190 to 58190 to 208190 to 508190 to 1008
X = 200200 to 1.8200 to 58200 to 208200 to 508200 to 1008
Percentage Calculator Online