The Ideal Gas Law Calculator uses the equation PV = nRT to solve for pressure (P), volume (V), number of moles (n), or temperature (T) of an ideal gas. This fundamental equation in chemistry describes the behavior of ideal gases under various conditions.

1. Enter any three of the four variables: pressure (P), volume (V), number of moles (n), or temperature (T)
2. Select the appropriate units for pressure and volume
3. The calculator will automatically solve for the missing variable
4. Results are displayed with appropriate units and scientific notation when necessary

• P (Pressure): Force per unit area exerted by the gas
• V (Volume): Space occupied by the gas
• n (Moles): Amount of gas present
• T (Temperature): Absolute temperature in Kelvin
• R: Gas constant (value depends on units used)

• Chemical reactions involving gases
• Industrial process calculations
• Laboratory gas calculations
• Atmospheric pressure studies
• Chemical engineering design

The ideal gas law assumes:
• Gas particles have negligible volume
• No intermolecular forces between particles
• Perfectly elastic collisions
• Random motion of particles

Real gases deviate from ideal behavior at high pressures and low temperatures.