Ideal Gas Law Calculator
Calculate pressure, volume, moles, or temperature using the ideal gas law PV = nRT.
Supports all four solve modes.
Pressure
Volume
Moles
Temperature
The Ideal Gas Law relates pressure, volume, temperature, and amount of gas:
PV = nRT
Where:
- P = Pressure (atm)
- V = Volume (liters)
- n = Amount of substance (moles)
- R = Gas constant = 0.08206 L·atm/(mol·K)
- T = Temperature (Kelvin)
Rearranged forms:
P = nRT / VV = nRT / Pn = PV / RTT = PV / nR
Common conditions:
- Standard Temperature and Pressure (STP): 273.15 K, 1 atm
- At STP, 1 mole of ideal gas occupies 22.414 liters
Temperature conversion: K = °C + 273.15