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 = 3.3 X = 73 X = 123 X = 223
P=5%5% of 3.35% of 735% of 1235% of 223
P=10%10% of 3.310% of 7310% of 12310% of 223
P=15%15% of 3.315% of 7315% of 12315% of 223
P=20%20% of 3.320% of 7320% of 12320% of 223
P=25%25% of 3.325% of 7325% of 12325% of 223
P=30%30% of 3.330% of 7330% of 12330% of 223
P=35%35% of 3.335% of 7335% of 12335% of 223
P=40%40% of 3.340% of 7340% of 12340% of 223
P=45%45% of 3.345% of 7345% of 12345% of 223
P=50%50% of 3.350% of 7350% of 12350% of 223
P=55%55% of 3.355% of 7355% of 12355% of 223
P=60%60% of 3.360% of 7360% of 12360% of 223
P=65%65% of 3.365% of 7365% of 12365% of 223
P=70%70% of 3.370% of 7370% of 12370% of 223
P=75%75% of 3.375% of 7375% of 12375% of 223
P=80%80% of 3.380% of 7380% of 12380% of 223
P=85%85% of 3.385% of 7385% of 12385% of 223
P=90%90% of 3.390% of 7390% of 12390% of 223
P=95%95% of 3.395% of 7395% of 12395% of 223
P=100%100% of 3.3100% of 73100% of 123100% of 223

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 = 3.3 Y = 43 Y = 73 Y = 123 Y = 223
X=55 is what % of 3.35 is what % of 435 is what % of 735 is what % of 1235 is what % of 223
X=1010 is what % of 3.310 is what % of 4310 is what % of 7310 is what % of 12310 is what % of 223
X=1515 is what % of 3.315 is what % of 4315 is what % of 7315 is what % of 12315 is what % of 223
X=2020 is what % of 3.320 is what % of 4320 is what % of 7320 is what % of 12320 is what % of 223
X=2525 is what % of 3.325 is what % of 4325 is what % of 7325 is what % of 12325 is what % of 223
X=3030 is what % of 3.330 is what % of 4330 is what % of 7330 is what % of 12330 is what % of 223
X=3535 is what % of 3.335 is what % of 4335 is what % of 7335 is what % of 12335 is what % of 223
X=4040 is what % of 3.340 is what % of 4340 is what % of 7340 is what % of 12340 is what % of 223
X=4545 is what % of 3.345 is what % of 4345 is what % of 7345 is what % of 12345 is what % of 223
X=5050 is what % of 3.350 is what % of 4350 is what % of 7350 is what % of 12350 is what % of 223
X=5555 is what % of 3.355 is what % of 4355 is what % of 7355 is what % of 12355 is what % of 223
X=6060 is what % of 3.360 is what % of 4360 is what % of 7360 is what % of 12360 is what % of 223
X=6565 is what % of 3.365 is what % of 4365 is what % of 7365 is what % of 12365 is what % of 223
X=7070 is what % of 3.370 is what % of 4370 is what % of 7370 is what % of 12370 is what % of 223
X=7575 is what % of 3.375 is what % of 4375 is what % of 7375 is what % of 12375 is what % of 223
X=8080 is what % of 3.380 is what % of 4380 is what % of 7380 is what % of 12380 is what % of 223
X=8585 is what % of 3.385 is what % of 4385 is what % of 7385 is what % of 12385 is what % of 223
X=9090 is what % of 3.390 is what % of 4390 is what % of 7390 is what % of 12390 is what % of 223
X=9595 is what % of 3.395 is what % of 4395 is what % of 7395 is what % of 12395 is what % of 223
X=100100 is what % of 3.3100 is what % of 43100 is what % of 73100 is what % of 123100 is what % of 223

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 = 3.3 Y = 73 Y = 223 Y = 523 Y = 1023
X = 1010 to 3.310 to 7310 to 22310 to 52310 to 1023
X = 2020 to 3.320 to 7320 to 22320 to 52320 to 1023
X = 3030 to 3.330 to 7330 to 22330 to 52330 to 1023
X = 4040 to 3.340 to 7340 to 22340 to 52340 to 1023
X = 5050 to 3.350 to 7350 to 22350 to 52350 to 1023
X = 6060 to 3.360 to 7360 to 22360 to 52360 to 1023
X = 7070 to 3.370 to 7370 to 22370 to 52370 to 1023
X = 8080 to 3.380 to 7380 to 22380 to 52380 to 1023
X = 9090 to 3.390 to 7390 to 22390 to 52390 to 1023
X = 100100 to 3.3100 to 73100 to 223100 to 523100 to 1023
X = 110110 to 3.3110 to 73110 to 223110 to 523110 to 1023
X = 120120 to 3.3120 to 73120 to 223120 to 523120 to 1023
X = 130130 to 3.3130 to 73130 to 223130 to 523130 to 1023
X = 140140 to 3.3140 to 73140 to 223140 to 523140 to 1023
X = 150150 to 3.3150 to 73150 to 223150 to 523150 to 1023
X = 160160 to 3.3160 to 73160 to 223160 to 523160 to 1023
X = 170170 to 3.3170 to 73170 to 223170 to 523170 to 1023
X = 180180 to 3.3180 to 73180 to 223180 to 523180 to 1023
X = 190190 to 3.3190 to 73190 to 223190 to 523190 to 1023
X = 200200 to 3.3200 to 73200 to 223200 to 523200 to 1023
Percentage Calculator Online