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CO₂ Weight → Volume Conversion

Select state & conditions, enter weight, and get volume in L / m³ / ft³ / gal.






Typical approximate densities (kg/L): −20 °C ≈ 1.10 · 0 °C ≈ 0.94 · 20 °C ≈ 0.77. Actual density varies with temperature & pressure inside cylinders.

Liters
 
Cubic meters (m³)
 
Cubic feet (ft³)
 
US gallons
 

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Assumptions: Gas at STP uses 22.414 L/mol at 0 °C, 1 atm. NTP uses 24.045 L/mol at 20 °C, 1 atm. Custom gas uses the ideal gas law (R = 8.314462618 kPa·L·mol⁻¹·K⁻¹). Molar mass of CO₂ = 44.0095 g/mol.

Liquid: Volume = mass / density. Default density 0.77 kg/L (≈20 °C). Adjust as needed for your temperature/pressure.

Engineering disclaimer: Real CO₂ deviates from ideal at higher pressures/near critical region. For compliance-critical calcs, use NIST data or an EOS (Span–Wagner) with exact T/P.



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Co2 Weight to Volume Conversion

Weight of Liquid or Gas Volume of Liquid at 300 psig Volume of Gas at 70° (21°C) and 1 atm
lb kg L gal cf m3
1.000 0.454 0.447 0.118 8.743 0.248
2.205 1.000 0.9852 0.261 19.278 0.5458
2.238 1.015 1.001 0.264 19.566 0.554
8.470 3.842 3.789 1.001 74.050 2.097
11.440 5.189 5.118 1.352 100.016 2.832
4.039 1.832 1.807 0.447 35.31 1.000
Enter numbers in boxes below for conversion values.