Constant and units
R = 0.0821 L·atm/(mol·K) — when P is in atm, V in litres, T in Kelvin.
The calculator converts all entered units to atm, L, K internally before solving.
Ideal gas law calculator (PV = nRT)
Pick the variable to solve for. Pressure, volume, amount of substance and temperature relate by PV = nRT, where R = 0.0821 L·atm/(mol·K).
mol
Pressure
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