Calculate gas properties, molar volumes, and conversions at Standard Temperature and Pressure conditions. Perfect for chemistry students, researchers, and professionals.
Standard Temperature and Pressure (STP) Conditions
Temperature
273.15 K (0°C)
Pressure
1 atm (101.325 kPa)
Molar Volume
22.414 L/mol
Gas Constant
0.08206 L·atm/(mol·K)
Volume ↔ Moles Calculator
Calculation Results
Explanation
Mass ↔ Moles Calculator
Calculation Results
Explanation
Gas Density Calculator
Density Results
Explanation
📊 Common Gas Properties at STP
Hydrogen (H₂)
2.02 g/mol
0.090 g/L
Oxygen (O₂)
32.00 g/mol
1.429 g/L
Nitrogen (N₂)
28.01 g/mol
1.250 g/L
Carbon Dioxide (CO₂)
44.01 g/mol
1.964 g/L
Methane (CH₄)
16.04 g/mol
0.716 g/L
Ammonia (NH₃)
17.03 g/mol
0.760 g/L
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