Ideal Gas Law Calculator

Calculate pressure, volume, temperature, or moles using PV = nRT

PV = nRT

Pressure x Volume = Moles x Gas Constant x Temperature

Solve For

Volume (V)

Moles (n)

Temperature (T)

Result Unit for Pressure

Standard Temperature and Pressure: 273.15 K (0°C), 1 atm

Oxygen (O₂)

Essential for respiration

32 g/mol

Molar Mass

Nitrogen (N₂)

78% of atmosphere

28 g/mol

Molar Mass

Carbon Dioxide (CO₂)

Greenhouse gas

44 g/mol

Molar Mass

Helium (He)

Noble gas, lighter than air

4 g/mol

Molar Mass

Hydrogen (H₂)

Lightest element

2 g/mol

Molar Mass

Molar Volume at STP: 1 mole of any ideal gas occupies 22.4 L at standard temperature and pressure.