Three equations. Hundreds of compounds. No compromise.
400+ compounds
Each with its own equation selection, coefficient set, and valid temperature range — no single-equation approximation applied across the board.
VaporCalc selects Antoine, Wagner, or Riedel per compound — whichever equation the source data supports. Every plot traces back to a peer-reviewed reference, visible in the UI.
A focused tool. Every feature earns its place.
Equation selection per compound
Peer-reviewed source references
Export-ready plots and tables
Antoine, Wagner, and Riedel equations are applied based on each compound's data quality and temperature range — not a blanket approximation.
Every compound entry cites its data source directly in the UI. You see the reference before you use the number — no guessing at provenance.
Output vapor pressure curves and tabular data in standard formats. Paste directly into reports or analysis workflows without reformatting.
Thermodynamic first principles, honestly applied
Coefficients are drawn from NIST, DIPPR, and peer-reviewed literature — not fitted to arbitrary datasets. Each compound's valid temperature range is enforced; the app will not extrapolate silently.
If a compound is outside the database or the requested range exceeds the equation's validity, VaporCalc says so. Repeatable results depend on knowing where the data ends.
Run your compounds. Verify the results.
Download VaporCalc, load a compound you know, and check the output against your reference data. The accuracy speaks for itself.