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STP Calculator
Calculate gas volume or moles at Standard Temperature and Pressure
Standards:
• Traditional STP: 0 °C (273.15 K), 1 atm → Molar Volume = 22.414 L/mol
• IUPAC STP: 0 °C (273.15 K), 1 bar → Molar Volume = 22.711 L/mol
• Traditional STP: 0 °C (273.15 K), 1 atm → Molar Volume = 22.414 L/mol
• IUPAC STP: 0 °C (273.15 K), 1 bar → Molar Volume = 22.711 L/mol
Calculation Parameters
Calculation Results
⚠️ Gas volume calculations at STP assume ideal gas behavior. Real gases (especially under high pressure or near condensation points) deviate from ideal molar volumes due to intermolecular forces and molecular volume [cite: "Calculators Tools - Correct"].