Overview
What Is the Ideal Gas Law?
The Ideal Gas Law (PV=nRT) relates pressure, volume, moles, and temperature of an ideal gas, a fundamental chemistry equation.
Calculate gas properties using PV=nRT.
PV = nRT (R = 0.0821 L·atm/mol·K)
The Ideal Gas Law (PV=nRT) relates pressure, volume, moles, and temperature of an ideal gas, a fundamental chemistry equation.
Useful for gas law problems in general chemistry coursework.
Input pressure, volume, moles, or temperature - leaving one blank.
The missing variable updates automatically.
PV = nRT, where P is pressure, V is volume, n is moles, R is the gas constant, and T is temperature in Kelvin.
Pressure in atmospheres, volume in liters, moles, and temperature in Kelvin, matching R = 0.0821 L·atm/(mol·K).
The gas law requires absolute temperature - Celsius or Fahrenheit would give incorrect results since they don't start at absolute zero.
A theoretical gas that perfectly follows this equation - real gases approximate this behavior under normal conditions but deviate at extremes.
Yes, given any three values, you can solve for the fourth.
No, calculations happen entirely in your browser.
It works well as an approximation for most gases under normal conditions - behavior deviates at very high pressure or low temperature.
Predicting gas behavior in chemical reactions, engineering applications, and general chemistry problem-solving.
Add 273.15 to your Celsius temperature.
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