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 = 1.9 X = 59 X = 109 X = 209
P=5%5% of 1.95% of 595% of 1095% of 209
P=10%10% of 1.910% of 5910% of 10910% of 209
P=15%15% of 1.915% of 5915% of 10915% of 209
P=20%20% of 1.920% of 5920% of 10920% of 209
P=25%25% of 1.925% of 5925% of 10925% of 209
P=30%30% of 1.930% of 5930% of 10930% of 209
P=35%35% of 1.935% of 5935% of 10935% of 209
P=40%40% of 1.940% of 5940% of 10940% of 209
P=45%45% of 1.945% of 5945% of 10945% of 209
P=50%50% of 1.950% of 5950% of 10950% of 209
P=55%55% of 1.955% of 5955% of 10955% of 209
P=60%60% of 1.960% of 5960% of 10960% of 209
P=65%65% of 1.965% of 5965% of 10965% of 209
P=70%70% of 1.970% of 5970% of 10970% of 209
P=75%75% of 1.975% of 5975% of 10975% of 209
P=80%80% of 1.980% of 5980% of 10980% of 209
P=85%85% of 1.985% of 5985% of 10985% of 209
P=90%90% of 1.990% of 5990% of 10990% of 209
P=95%95% of 1.995% of 5995% of 10995% of 209
P=100%100% of 1.9100% of 59100% of 109100% of 209

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 = 1.9 Y = 29 Y = 59 Y = 109 Y = 209
X=55 is what % of 1.95 is what % of 295 is what % of 595 is what % of 1095 is what % of 209
X=1010 is what % of 1.910 is what % of 2910 is what % of 5910 is what % of 10910 is what % of 209
X=1515 is what % of 1.915 is what % of 2915 is what % of 5915 is what % of 10915 is what % of 209
X=2020 is what % of 1.920 is what % of 2920 is what % of 5920 is what % of 10920 is what % of 209
X=2525 is what % of 1.925 is what % of 2925 is what % of 5925 is what % of 10925 is what % of 209
X=3030 is what % of 1.930 is what % of 2930 is what % of 5930 is what % of 10930 is what % of 209
X=3535 is what % of 1.935 is what % of 2935 is what % of 5935 is what % of 10935 is what % of 209
X=4040 is what % of 1.940 is what % of 2940 is what % of 5940 is what % of 10940 is what % of 209
X=4545 is what % of 1.945 is what % of 2945 is what % of 5945 is what % of 10945 is what % of 209
X=5050 is what % of 1.950 is what % of 2950 is what % of 5950 is what % of 10950 is what % of 209
X=5555 is what % of 1.955 is what % of 2955 is what % of 5955 is what % of 10955 is what % of 209
X=6060 is what % of 1.960 is what % of 2960 is what % of 5960 is what % of 10960 is what % of 209
X=6565 is what % of 1.965 is what % of 2965 is what % of 5965 is what % of 10965 is what % of 209
X=7070 is what % of 1.970 is what % of 2970 is what % of 5970 is what % of 10970 is what % of 209
X=7575 is what % of 1.975 is what % of 2975 is what % of 5975 is what % of 10975 is what % of 209
X=8080 is what % of 1.980 is what % of 2980 is what % of 5980 is what % of 10980 is what % of 209
X=8585 is what % of 1.985 is what % of 2985 is what % of 5985 is what % of 10985 is what % of 209
X=9090 is what % of 1.990 is what % of 2990 is what % of 5990 is what % of 10990 is what % of 209
X=9595 is what % of 1.995 is what % of 2995 is what % of 5995 is what % of 10995 is what % of 209
X=100100 is what % of 1.9100 is what % of 29100 is what % of 59100 is what % of 109100 is what % of 209

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 = 1.9 Y = 59 Y = 209 Y = 509 Y = 1009
X = 1010 to 1.910 to 5910 to 20910 to 50910 to 1009
X = 2020 to 1.920 to 5920 to 20920 to 50920 to 1009
X = 3030 to 1.930 to 5930 to 20930 to 50930 to 1009
X = 4040 to 1.940 to 5940 to 20940 to 50940 to 1009
X = 5050 to 1.950 to 5950 to 20950 to 50950 to 1009
X = 6060 to 1.960 to 5960 to 20960 to 50960 to 1009
X = 7070 to 1.970 to 5970 to 20970 to 50970 to 1009
X = 8080 to 1.980 to 5980 to 20980 to 50980 to 1009
X = 9090 to 1.990 to 5990 to 20990 to 50990 to 1009
X = 100100 to 1.9100 to 59100 to 209100 to 509100 to 1009
X = 110110 to 1.9110 to 59110 to 209110 to 509110 to 1009
X = 120120 to 1.9120 to 59120 to 209120 to 509120 to 1009
X = 130130 to 1.9130 to 59130 to 209130 to 509130 to 1009
X = 140140 to 1.9140 to 59140 to 209140 to 509140 to 1009
X = 150150 to 1.9150 to 59150 to 209150 to 509150 to 1009
X = 160160 to 1.9160 to 59160 to 209160 to 509160 to 1009
X = 170170 to 1.9170 to 59170 to 209170 to 509170 to 1009
X = 180180 to 1.9180 to 59180 to 209180 to 509180 to 1009
X = 190190 to 1.9190 to 59190 to 209190 to 509190 to 1009
X = 200200 to 1.9200 to 59200 to 209200 to 509200 to 1009
Percentage Calculator Online