Ideal Gas Law Calculator
Solve PV = nRT effortlessly. Select what you want to find, enter your known values, and we'll handle the unit conversions automatically.
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The Ideal Gas Law (PV = nRT)
The Ideal Gas Law is the equation of state of a hypothetical ideal gas. It perfectly relates the four standard properties of a gas:
- P (Pressure): The force exerted by the gas. Standard pressure is 1 atm.
- V (Volume): The space the gas occupies. Usually measured in Liters (L).
- n (Moles): The amount of gas particles present.
- T (Temperature): The absolute temperature of the gas. This must be measured in Kelvin (K) for the math to work! (Our calculator converts Celsius and Fahrenheit to Kelvin for you behind the scenes).
- R (Gas Constant): The constant of proportionality. When using atm and Liters, $R = 0.08206$ L·atm/(mol·K).
Standard Temperature and Pressure (STP): At exactly 1 atm of pressure and 273.15 K (0°C), exactly 1 mole of any ideal gas will occupy 22.414 Liters of volume.