Refrigerant PT Chart

Turn refrigerant pressure and temperature readings into a clear saturation reference. Refrigerant PT Chart helps HVAC/R technicians look up saturation temperature from pressure, or pressure from temperature, with separate liquid/bubble and vapor/dew results for blends.

Work with suction and liquid-line readings together. Enter each line pressure and pipe temperature to calculate superheat and subcooling using the appropriate saturation branch. Compare pipe temperatures and saturation values on visual scales, with signed results and visible units.

PRESSURE-TEMPERATURE REFERENCE
• Convert in both directions with psi, bar, kPa or MPa and Celsius or Fahrenheit.
• Choose gauge or absolute pressure and adjust the atmospheric reference manually.
• Explore a PT table and saturation chart with a cursor linked to the calculator.
• Compare bubble and dew values without hiding refrigerant glide in an average.

REFRIGERANTS CLOSE AT HAND
Search by refrigerant code or full name, mark favorites and return to recent choices. Included refrigerants: R22, R32, R134a, R290, R404A, R407A, R407C, R410A, R422D, R448A, R449A, R454B, R507A, R513A, R600a, R717, R744 and R1234yf.

KEEP AND SHARE YOUR CALCULATIONS
Save named records with original readings, units, pressure convention, atmospheric reference, results and dataset version. Search and select saved records, reopen their original snapshots, or explicitly recalculate as a new record. Share a CSV file or readable PDF report for the current calculation or selected records.

Each refrigerant has a model and valid data range, with no extrapolation. R454B is limited to 50 °C, R744 to 28 °C and R448A to -40 through 60 °C. Low-temperature model agreement limits for R448A and R513A pressure values are explained in their fluid details.

Use this reference calculator with readings you enter manually and equipment-specific design information. The phone does not measure pressure or pipe temperature, identify refrigerants, diagnose equipment or provide a universal charging target.