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 = 1.5 X = 55 X = 105 X = 205
P=5%5% of 1.55% of 555% of 1055% of 205
P=10%10% of 1.510% of 5510% of 10510% of 205
P=15%15% of 1.515% of 5515% of 10515% of 205
P=20%20% of 1.520% of 5520% of 10520% of 205
P=25%25% of 1.525% of 5525% of 10525% of 205
P=30%30% of 1.530% of 5530% of 10530% of 205
P=35%35% of 1.535% of 5535% of 10535% of 205
P=40%40% of 1.540% of 5540% of 10540% of 205
P=45%45% of 1.545% of 5545% of 10545% of 205
P=50%50% of 1.550% of 5550% of 10550% of 205
P=55%55% of 1.555% of 5555% of 10555% of 205
P=60%60% of 1.560% of 5560% of 10560% of 205
P=65%65% of 1.565% of 5565% of 10565% of 205
P=70%70% of 1.570% of 5570% of 10570% of 205
P=75%75% of 1.575% of 5575% of 10575% of 205
P=80%80% of 1.580% of 5580% of 10580% of 205
P=85%85% of 1.585% of 5585% of 10585% of 205
P=90%90% of 1.590% of 5590% of 10590% of 205
P=95%95% of 1.595% of 5595% of 10595% of 205
P=100%100% of 1.5100% of 55100% of 105100% of 205

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 = 1.5 Y = 25 Y = 55 Y = 105 Y = 205
X=55 is what % of 1.55 is what % of 255 is what % of 555 is what % of 1055 is what % of 205
X=1010 is what % of 1.510 is what % of 2510 is what % of 5510 is what % of 10510 is what % of 205
X=1515 is what % of 1.515 is what % of 2515 is what % of 5515 is what % of 10515 is what % of 205
X=2020 is what % of 1.520 is what % of 2520 is what % of 5520 is what % of 10520 is what % of 205
X=2525 is what % of 1.525 is what % of 2525 is what % of 5525 is what % of 10525 is what % of 205
X=3030 is what % of 1.530 is what % of 2530 is what % of 5530 is what % of 10530 is what % of 205
X=3535 is what % of 1.535 is what % of 2535 is what % of 5535 is what % of 10535 is what % of 205
X=4040 is what % of 1.540 is what % of 2540 is what % of 5540 is what % of 10540 is what % of 205
X=4545 is what % of 1.545 is what % of 2545 is what % of 5545 is what % of 10545 is what % of 205
X=5050 is what % of 1.550 is what % of 2550 is what % of 5550 is what % of 10550 is what % of 205
X=5555 is what % of 1.555 is what % of 2555 is what % of 5555 is what % of 10555 is what % of 205
X=6060 is what % of 1.560 is what % of 2560 is what % of 5560 is what % of 10560 is what % of 205
X=6565 is what % of 1.565 is what % of 2565 is what % of 5565 is what % of 10565 is what % of 205
X=7070 is what % of 1.570 is what % of 2570 is what % of 5570 is what % of 10570 is what % of 205
X=7575 is what % of 1.575 is what % of 2575 is what % of 5575 is what % of 10575 is what % of 205
X=8080 is what % of 1.580 is what % of 2580 is what % of 5580 is what % of 10580 is what % of 205
X=8585 is what % of 1.585 is what % of 2585 is what % of 5585 is what % of 10585 is what % of 205
X=9090 is what % of 1.590 is what % of 2590 is what % of 5590 is what % of 10590 is what % of 205
X=9595 is what % of 1.595 is what % of 2595 is what % of 5595 is what % of 10595 is what % of 205
X=100100 is what % of 1.5100 is what % of 25100 is what % of 55100 is what % of 105100 is what % of 205

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 = 1.5 Y = 55 Y = 205 Y = 505 Y = 1005
X = 1010 to 1.510 to 5510 to 20510 to 50510 to 1005
X = 2020 to 1.520 to 5520 to 20520 to 50520 to 1005
X = 3030 to 1.530 to 5530 to 20530 to 50530 to 1005
X = 4040 to 1.540 to 5540 to 20540 to 50540 to 1005
X = 5050 to 1.550 to 5550 to 20550 to 50550 to 1005
X = 6060 to 1.560 to 5560 to 20560 to 50560 to 1005
X = 7070 to 1.570 to 5570 to 20570 to 50570 to 1005
X = 8080 to 1.580 to 5580 to 20580 to 50580 to 1005
X = 9090 to 1.590 to 5590 to 20590 to 50590 to 1005
X = 100100 to 1.5100 to 55100 to 205100 to 505100 to 1005
X = 110110 to 1.5110 to 55110 to 205110 to 505110 to 1005
X = 120120 to 1.5120 to 55120 to 205120 to 505120 to 1005
X = 130130 to 1.5130 to 55130 to 205130 to 505130 to 1005
X = 140140 to 1.5140 to 55140 to 205140 to 505140 to 1005
X = 150150 to 1.5150 to 55150 to 205150 to 505150 to 1005
X = 160160 to 1.5160 to 55160 to 205160 to 505160 to 1005
X = 170170 to 1.5170 to 55170 to 205170 to 505170 to 1005
X = 180180 to 1.5180 to 55180 to 205180 to 505180 to 1005
X = 190190 to 1.5190 to 55190 to 205190 to 505190 to 1005
X = 200200 to 1.5200 to 55200 to 205200 to 505200 to 1005
Percentage Calculator Online