This Ideal Gas Law Calculator calculates either the mass, volume, pressure or temperature of a gas sample if the gas type and the other variables are provided. Below the form you can discover more on this topic.

Instruction: Please select the gas name and input three fields from the four below!

Gas name:*
Pressure:*
Volume:*
Temperature:*
Mass:*

## How does this ideal gas law calculator work?

Initially affirmed by Émile Clapeyron in 1834 (as a combination of other two existing gas laws of Boyle, respectively Charles), the common form of the ideal gas law is P*V = N*R*T, while its molar expression is P*V = (m/M)*R*T. It is being used to approximate the behavior of various gases under specific conditions.

Where:

P = gas pressure

V = gas volume

T = gas temperature

R = the ideal gas constant equal to 8314.4621

m = mass

M = molar mass (please note that m/M represents the number of moles - N).

For each gas type from the drop down list, this ideal gas law calculator uses the molar masses from the periodic table of Mendeleev and requires three out of the 4 fields available (plus the gas name).

Depending on the given variables the following measurement units can be used at the data input within the form:

Pressure is by default set up to Pa but can be expressed using one of these units:

 From: To: Pa KPa 1000 Bar 100000 atm 101325.01 mmHg 133.32238157895 mbar 100

Volume is by default in m3

 From: To: m3 l 0.001 ml 0.000001 ft3 0.02831685 in3 0.00001638706

The temperature is by default in Kelvin but there are other two options: Celsius or Fahrenheit. The calculator will automatically convert it to Kelvin by using these conversion rules:

From °C to K = t°C + 273.15

From °F to K = (t°F + 459.67) * 5/9

Mass is in kg, while there are other 3 units available:

 From: To: Kg g 0.001 lbs 0.453592 ounce 0.0283495

22 Jun, 2015