Refrigerant P-T Chart Calculator
Look up the saturation pressure or temperature for common refrigerants.
Result
118.8 psig
Usage examples
Checking refrigerant charge
Look up the saturation temperature for a pressure reading off your service port gauge to quickly check whether the system is operating in a normal range.
Getting ready to calculate superheat or subcooling
Find the saturation pressure matching the measured temperature on the suction or liquid line to use as a baseline for superheat or subcooling calculations.
Quickly estimating in the field without a gauge
Even with just a measured pipe surface temperature, estimate the expected saturation pressure for that refrigerant right away.
Frequently asked questions
Where does this data come from?
It's based on a saturation pressure table computed with CoolProp (an open-source thermodynamic properties library), cross-checked against two independent sources. Intermediate temperatures not in the table are computed via log-linear interpolation.
Why only R-410A, R-22, R-134a, and R-404A?
Only refrigerants with reliably cross-verifiable data are included. We chose a narrower scope over showing unverified numbers.
Why are the R-404A values approximate?
R-404A is a zeotropic blend, so its liquid (bubble point) and vapor (dew point) pressures differ slightly. This tool uses the average of the two to keep things simple — for precise superheat/subcooling work, consult a dedicated glide table.
Can I look up values below -40°F or above 140°F?
Currently only -40°F to 140°F (about -40°C to 60°C) is supported, which covers the range most commonly needed in everyday HVAC/refrigeration field work.