Ideal Gas Law Calculator (PV = nRT)
Variable Key
P= pressure (Pa)V= volume (m³)n= moles of gasR= gas constant = 8.314 J/(mol·K)T= temperature (Kelvin)
Ideal gas law
The fundamental relationship PV = nRT.
Solve for each variable
Rearrange for any unknown.
Find P
Find V
Find n
Find T
Combined gas law
Relates two states of the same gas sample.
Convert temperature
The gas law requires temperature in Kelvin.
P= pressure (Pa)
V= volume (m³)
n= moles of gas
R= gas constant = 8.314 J/(mol·K)
T= temperature (Kelvin)
The ideal gas law PV = nRT relates pressure (P), volume (V), moles (n), and temperature (T) of an ideal gas. R = 8.314 J/(mol·K) is the universal gas constant.
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Did You Know?
At standard conditions (0°C, 1 atm), 1 mole of any ideal gas occupies exactly 22.414 litres — the molar volume.
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