Value Of R In Atm

In physics, the gas constant is defined as the product of pressure and volume. It is denoted by R and expressed as energy per temperature increase per mole. The value of gas constant at atm is constant. But the value of gas constant can be expressed using various units. It is also known as ideal gas constant or universal gas constant or molar constant.

Value Of Gas Constant

The value of R at atm that is at standard atmospheric pressure is R = 8.3144598 J.mol-1.K-1.

Value Of R

The value of R can be expressed in multiple units. The table given below is comprised of the list of values of R in diverse units.

Values of R




8.3144598 × 103


8.3144598 × 10-2





1.9872036 × 10-3


8.2057338 × 10-5




Gas Constant Formula

The above values are calculated using the ideal gas equation as follows:

PV = nRT

\(\begin{array}{l}\Rightarrow R=\frac{PV}{nT}\end{array} \)


  • P is the pressure of the ideal gas.
  • V is the volume of the ideal gas.
  • T is the temperature.
  • n is the number of the ideal gas

Hope you have learnt the value of R at atm, along with the list of the values of R in various other units.

Physics Related Topics:

Frequently Asked Questions – FAQs

What is the formula to calculate the specific gas constant?

\(\begin{array}{l}R_{specific}=\frac{R}{M}\end{array} \)
where, R is the gas constant and M is the molar mass of the gas.

What is the value of Gas constant (R)?

The gas constant value is given by R = 8.3144598(48) J⋅mol^−1⋅K^−1.

Write the formula for an ideal gas equation.

The ideal gas equation is given by PV=nRT.

What is a gas constant also known as?

Gas constant is also known as ideal gas constant or molar gas constant or universal gas constant.

The ideal gas constant is the combination of which laws?

The ideal gas constant is the combination of:
  • Boyle’s law
  • Charle’s law
  • Gay-Lussac’s law
  • Avogadro’s number

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