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 = 2.5 X = 65 X = 115 X = 215
P=5%5% of 2.55% of 655% of 1155% of 215
P=10%10% of 2.510% of 6510% of 11510% of 215
P=15%15% of 2.515% of 6515% of 11515% of 215
P=20%20% of 2.520% of 6520% of 11520% of 215
P=25%25% of 2.525% of 6525% of 11525% of 215
P=30%30% of 2.530% of 6530% of 11530% of 215
P=35%35% of 2.535% of 6535% of 11535% of 215
P=40%40% of 2.540% of 6540% of 11540% of 215
P=45%45% of 2.545% of 6545% of 11545% of 215
P=50%50% of 2.550% of 6550% of 11550% of 215
P=55%55% of 2.555% of 6555% of 11555% of 215
P=60%60% of 2.560% of 6560% of 11560% of 215
P=65%65% of 2.565% of 6565% of 11565% of 215
P=70%70% of 2.570% of 6570% of 11570% of 215
P=75%75% of 2.575% of 6575% of 11575% of 215
P=80%80% of 2.580% of 6580% of 11580% of 215
P=85%85% of 2.585% of 6585% of 11585% of 215
P=90%90% of 2.590% of 6590% of 11590% of 215
P=95%95% of 2.595% of 6595% of 11595% of 215
P=100%100% of 2.5100% of 65100% of 115100% of 215

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 = 2.5 Y = 35 Y = 65 Y = 115 Y = 215
X=55 is what % of 2.55 is what % of 355 is what % of 655 is what % of 1155 is what % of 215
X=1010 is what % of 2.510 is what % of 3510 is what % of 6510 is what % of 11510 is what % of 215
X=1515 is what % of 2.515 is what % of 3515 is what % of 6515 is what % of 11515 is what % of 215
X=2020 is what % of 2.520 is what % of 3520 is what % of 6520 is what % of 11520 is what % of 215
X=2525 is what % of 2.525 is what % of 3525 is what % of 6525 is what % of 11525 is what % of 215
X=3030 is what % of 2.530 is what % of 3530 is what % of 6530 is what % of 11530 is what % of 215
X=3535 is what % of 2.535 is what % of 3535 is what % of 6535 is what % of 11535 is what % of 215
X=4040 is what % of 2.540 is what % of 3540 is what % of 6540 is what % of 11540 is what % of 215
X=4545 is what % of 2.545 is what % of 3545 is what % of 6545 is what % of 11545 is what % of 215
X=5050 is what % of 2.550 is what % of 3550 is what % of 6550 is what % of 11550 is what % of 215
X=5555 is what % of 2.555 is what % of 3555 is what % of 6555 is what % of 11555 is what % of 215
X=6060 is what % of 2.560 is what % of 3560 is what % of 6560 is what % of 11560 is what % of 215
X=6565 is what % of 2.565 is what % of 3565 is what % of 6565 is what % of 11565 is what % of 215
X=7070 is what % of 2.570 is what % of 3570 is what % of 6570 is what % of 11570 is what % of 215
X=7575 is what % of 2.575 is what % of 3575 is what % of 6575 is what % of 11575 is what % of 215
X=8080 is what % of 2.580 is what % of 3580 is what % of 6580 is what % of 11580 is what % of 215
X=8585 is what % of 2.585 is what % of 3585 is what % of 6585 is what % of 11585 is what % of 215
X=9090 is what % of 2.590 is what % of 3590 is what % of 6590 is what % of 11590 is what % of 215
X=9595 is what % of 2.595 is what % of 3595 is what % of 6595 is what % of 11595 is what % of 215
X=100100 is what % of 2.5100 is what % of 35100 is what % of 65100 is what % of 115100 is what % of 215

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 = 2.5 Y = 65 Y = 215 Y = 515 Y = 1015
X = 1010 to 2.510 to 6510 to 21510 to 51510 to 1015
X = 2020 to 2.520 to 6520 to 21520 to 51520 to 1015
X = 3030 to 2.530 to 6530 to 21530 to 51530 to 1015
X = 4040 to 2.540 to 6540 to 21540 to 51540 to 1015
X = 5050 to 2.550 to 6550 to 21550 to 51550 to 1015
X = 6060 to 2.560 to 6560 to 21560 to 51560 to 1015
X = 7070 to 2.570 to 6570 to 21570 to 51570 to 1015
X = 8080 to 2.580 to 6580 to 21580 to 51580 to 1015
X = 9090 to 2.590 to 6590 to 21590 to 51590 to 1015
X = 100100 to 2.5100 to 65100 to 215100 to 515100 to 1015
X = 110110 to 2.5110 to 65110 to 215110 to 515110 to 1015
X = 120120 to 2.5120 to 65120 to 215120 to 515120 to 1015
X = 130130 to 2.5130 to 65130 to 215130 to 515130 to 1015
X = 140140 to 2.5140 to 65140 to 215140 to 515140 to 1015
X = 150150 to 2.5150 to 65150 to 215150 to 515150 to 1015
X = 160160 to 2.5160 to 65160 to 215160 to 515160 to 1015
X = 170170 to 2.5170 to 65170 to 215170 to 515170 to 1015
X = 180180 to 2.5180 to 65180 to 215180 to 515180 to 1015
X = 190190 to 2.5190 to 65190 to 215190 to 515190 to 1015
X = 200200 to 2.5200 to 65200 to 215200 to 515200 to 1015
Percentage Calculator Online