Kelvin

Print a P–T chart for a refrigerant

Download a one-page A4 pressure–temperature chart for any refrigerant with a public table, in kPa and bar gauge.

Training and classes · Updated 7 Oct 2026

Every refrigerant with a public table has a printable pressure–temperature chart: one A4 PDF to print, pin up or keep on a phone. The charts need no account.

Get a chart

  1. 1

    Open Refrigeration tools and find the refrigerant under Printable P–T charts.

  2. 2

    Choose its chart in the P–T chart column. It opens as a PDF to print or save.

  3. 3

    Calculate in the same row opens the superheat and subcooling calculator on that refrigerant.

Each refrigerant's own page links its chart too, as Download printable P–T chart (PDF).

What a chart shows

  • Every 2 K row of the refrigerant's table against pressure in kPa gauge and bar gauge.
  • For a blend, the bubble and dew pressures side by side.
  • Its safety class, GWP and ODP, with their sources.
  • Where CoolProp left rows of the table unsolved, a line saying so. Those rows are left out, not filled in by interpolation.

The figures are the refrigerant page's own, computed with CoolProp. Gauge pressures are taken against a standard atmosphere, as in the superheat and subcooling calculator.

Note

R-448A and R-450A have no chart: CoolProp can't form them, and Kelvin holds no other source it may republish. The figures must be verified by a qualified professional before they're relied on.