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Ideal Gas Law Calculator

Calculate pressure, volume, moles, or temperature using the ideal gas law equation PV = nRT.

Gas Properties
Enter any 3 values to calculate the 4th
Ideal Gas Law

Ideal Gas Law:

PV = nRT

Where: P = pressure, V = volume, n = moles, R = gas constant, T = temperature

Gas Constant (R):

  • • 0.08206 L·atm/(mol·K)
  • • 8.314 J/(mol·K)
  • • 62.36 L·mmHg/(mol·K)

Standard Conditions:

  • • STP: 0°C (273.15 K), 1 atm
  • • 1 mole of gas = 22.4 L at STP
  • • Room temp: ~25°C (298 K)

Assumptions:

  • • Gas particles have no volume
  • • No intermolecular forces
  • • Elastic collisions only
  • • Works best at high T, low P

Applications:

  • • Gas storage calculations
  • • Chemical reaction yields
  • • Atmospheric studies
  • • Engineering design
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