Created By : Rina Nayak

Reviewed By : Phani Ponnapalli

Last Updated : May 12, 2023

Ideal Gas Law Calculator is a handy tool that displays the properties of Ideal Gas Law given the other three parameters in Ideal Gas Law Equation. All you have to do is type in the input fields and tap on the calculate button to avail the unknown parameter in seconds.

Pressure (p):
substance number (n):


volume (V):
the temperature (T):

Ideal Gas Law - Definition

Ideal Gas Law also known as Universal Gas Law denotes the relationship between properties of an ideal gas. Ideal Gas Law in general combines Boyle's Law, Charles Law, Gay Lussac's Law and Avagadro's Law into one.

Ideal Gas Law Equation

Ideal Gas Law Equation states that pressure multiplied by volume is equal to product of number of moles with universal gas constant and temperature. The Ideal Gas Formula is given by PV = nRT

  • Where, P = pressure
  • V = volume
  • n = number of moles
  • T = temperature
  • R = gas constant

We can rearrange the above equation to determine each parameter involved. For finding Pressure the equation is P = nRT/V

To find Volume we have the formula V = nRT/P

Formula to determine moles is moles n = PV/RT

To Calculate Temperature we use the formula T = PV/nR

Ideal Gas Constant

Ideal Gas Constant is also known as Molar or Universal Constant. Usually it is denoted by the symbol R and is defined as the product of Boltzman Constant k with Avagadro's Number. The value of R in general is given by R = 8.31446261815324 m3·Pa·K-1·mol-1. However, the value of Ideal Gas Constant R might vary from unit to unit.

To know more about similar kind of calculators you can check our portal and make your conversions quickly.

FAQs on Free Ideal Gas Law Calculator

1. How do you calculate n in PV=nRT?

To find the number of moles n we can rearrange the equation i.e. n = PV/RT

2. What is the value of Ideal Gas Constant?

Ideal Gas Constant Value R is given by R = 8.3144626 J/(mol·K).

3. What is the formula of Ideal Gas Law?

Ideal Gas Law Formula is given by the equation PV = nRT.

4. How to use the Ideal Gas Law Calculator?

Just provide any of the 3 inputs in the allotted fields of the Ideal Gas Law Calculator and tap on the calculate button to get the unknown parameter in the Ideal Gas Law Equation PV = nRT.