Ideal Gas Law Calculator
Relate pressure, volume, moles, and temperature.
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Formula
PV = nRT
Ideal gas law uses R = 8.314 J/(mol·K). Real gases deviate at high pressure or low temperature.
Worked example
1 mol at STP-like conditions (273.15 K, 0.0224 m³) gives P ≈ 101325 Pa (1 atm).
Where this can give the wrong answer
- Temperature must be in kelvin.
- Very high P or low T need van der Waals corrections.
- Volume in m³ — 0.0224 m³ = 22.4 L.
FAQ
- 0.082057 L·atm/(mol·K) is common in textbooks; this calculator uses SI Pa·m³.