ideal gas law calculator

Calculate for:

Pressure (atm) P

Please enter a valid pressure.

Volume (Liters) V

Please enter a valid volume.

Moles (mol) n

Please enter a valid amount of moles.

Temperature (Kelvin) T

Please enter a valid temperature.

Understanding the Ideal Gas Law

The Ideal Gas Law is a fundamental equation in chemistry and physics that describes the behavior of an ideal gas. It relates the pressure, volume, temperature, and amount of gas (in moles) in a closed system.

The Formula: PV = nRT

The equation is typically written as:

PV = nRT

Where:

P stands for Pressure (usually in atmospheres, atm)
V stands for Volume (usually in Liters, L)
n stands for the number of Moles of gas (mol)
T stands for Temperature (must be in Kelvin, K)
R is the Ideal Gas Constant. For this calculator, we use 0.08206 L·atm/(mol·K).

How to Use This Calculator

Select the variable you wish to solve for from the dropdown menu (Pressure, Volume, Moles, or Temperature).
Enter the known values into the corresponding input fields.
Click the "Calculate" button to see the result.

Important Note on Temperature

When using the Ideal Gas Law, temperature must be in an absolute scale. If your temperature is in Celsius or Fahrenheit, you must convert it to Kelvin before entering it into the calculator.

To convert Celsius to Kelvin: K = °C + 273.15