CO₂ density & viscosity calculator
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Enter the stream pressure, temperature and impurity contents. The page works out CO₂ density from the Span-Wagner (1996) reference equation and viscosity from Fenghour et al. (1998), with a Kay's-rule correction for the impurities — the same correlations the CO₂ trapping calculator uses, so you can carry the conditions straight over.
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CO₂ density & viscosity from pressure, temperature and purity
| CO₂ purity | 100.00 mol% | 100 minus the typed impurities |
| CO₂ density | 669.5 kg/m³ | Span-Wagner 1996 (NIST reference EOS) |
| CO₂ viscosity | 0.0532 cp | Fenghour et al. 1998 (pure CO₂; impurity effect not corrected) |
| Mixture molecular weight | 44.01 g/mol |
- Density from the Span-Wagner (1996) reference EOS and viscosity from Fenghour et al. (1998) — the same correlations the CO₂ trapping calculator uses. Valid 44–350 °F, 725–7,250 psi.
- 100 mol% CO₂ — no impurity correction applied.
- Use these conditions on the CO₂ trapping calculator: its reservoir temperature and pressure boxes drive the same density and viscosity.
Use these conditions in the trapping calculator
Carries your temperature and pressure over; the trapping calculator works out the same density and viscosity from them.