R134A PT chart is a standard table. Basically, this 134A PT chart tells you what is the pressure of R134A refrigerant at certain temperatures. The charts start at the low end (-49°F) and tell you the pressures all the way to the high end (150°F).
Example: What is the pressure of 134A freon at 85°F? You just chart the chart (found below) and you will see that at 85°F, the pressure of R134A is 95.2 psig (pounds per square inch gauge).

The pressures in the PT chart are expressed in psig or gauge pressure. That’s very practical; we always use a pressure gauge meter when measuring the pressure in refrigerant lines.
Note: R134A is chemically named 1,1,1,2-Tetrafluoroethane. For on-site use, we include a printable R134A PT chart in PDF form at the end of the article.
To help everybody out, we have explained some examples about what is the 134A pressure on 75°F, 80°F, 90°F, and 100°F days below the PT chart for R134A. It’s quite useful to check that out if you find the chart a bit confusing.
Here is the full R134A PT table:
134A Pressure Temperature Chart
Temperature (°F): | Temperature (°C): | Pressure (psig): |
-49°F | -45.0°C | 18.4 psig |
-48°F | -44.4°C | 18.0 psig |
-47°F | -43.9°C | 17.6 psig |
-46°F | -43.3°C | 17.3 psig |
-45°F | -42.8°C | 16.9 psig |
-44°F | -42.2°C | 16.5 psig |
-43°F | -41.7°C | 16.1 psig |
-42°F | -41.1°C | 15.7 psig |
-41°F | -40.6°C | 15.2 psig |
-40°F | -40.0°C | 14.8 psig |
-39°F | -39.4°C | 14.4 psig |
-38°F | -38.9°C | 13.9 psig |
-37°F | -38.3°C | 13.4 psig |
-36°F | -37.8°C | 13.0 psig |
-35°F | -37.2°C | 12.5 psig |
-34°F | -36.7°C | 12.0 psig |
-33°F | -36.1°C | 11.4 psig |
-32°F | -35.6°C | 10.9 psig |
-31°F | -35.0°C | 10.4 psig |
-30°F | -34.4°C | 9.8 psig |
-29°F | -33.9°C | 9.3 psig |
-28°F | -33.3°C | 8.7 psig |
-27°F | -32.8°C | 8.1 psig |
-26°F | -32.2°C | 7.5 psig |
-25°F | -31.7°C | 6.9 psig |
-24°F | -31.1°C | 6.3 psig |
-23°F | -30.6°C | 5.7 psig |
-22°F | -30.0°C | 5.0 psig |
-21°F | -29.4°C | 4.3 psig |
-20°F | -28.9°C | 3.7 psig |
-19°F | -28.3°C | 3.0 psig |
-18°F | -27.8°C | 2.3 psig |
-17°F | -27.2°C | 1.5 psig |
-16°F | -26.7°C | 0.8 psig |
-15°F | -26.1°C | 0.1 psig |
-14°F | -25.6°C | 0.4 psig |
-13°F | -25.0°C | 0.7 psig |
-12°F | -24.4°C | 1.1 psig |
-11°F | -23.9°C | 1.5 psig |
-10°F | -23.3°C | 1.9 psig |
-9°F | -22.8°C | 2.4 psig |
-8°F | -22.2°C | 2.8 psig |
-7°F | -21.7°C | 3.2 psig |
-6°F | -21.1°C | 3.6 psig |
-5°F | -20.6°C | 4.1 psig |
-4°F | -20.0°C | 4.6 psig |
-3°F | -19.4°C | 5.0 psig |
-2°F | -18.9°C | 5.5 psig |
-1°F | -18.3°C | 6.0 psig |
0°F | -17.8°C | 6.5 psig |
1°F | -17.2°C | 7.0 psig |
2°F | -16.7°C | 7.5 psig |
3°F | -16.1°C | 8.0 psig |
4°F | -15.6°C | 8.5 psig |
5°F | -15.0°C | 9.1 psig |
6°F | -14.4°C | 9.6 psig |
7°F | -13.9°C | 10.2 psig |
8°F | -13.3°C | 10.8 psig |
9°F | -12.8°C | 11.3 psig |
10°F | -12.2°C | 11.9 psig |
11°F | -11.7°C | 12.5 psig |
12°F | -11.1°C | 13.1 psig |
13°F | -10.6°C | 13.8 psig |
14°F | -10.0°C | 14.4 psig |
15°F | -9.4°C | 15.0 psig |
16°F | -8.9°C | 15.7 psig |
17°F | -8.3°C | 16.4 psig |
18°F | -7.8°C | 17.0 psig |
19°F | -7.2°C | 17.7 psig |
20°F | -6.7°C | 18.4 psig |
21°F | -6.1°C | 19.1 psig |
22°F | -5.6°C | 19.9 psig |
23°F | -5.0°C | 20.6 psig |
24°F | -4.4°C | 21.3 psig |
25°F | -3.9°C | 22.1 psig |
26°F | -3.3°C | 22.9 psig |
27°F | -2.8°C | 23.7 psig |
28°F | -2.2°C | 24.5 psig |
29°F | -1.7°C | 25.3 psig |
30°F | -1.1°C | 26.1 psig |
31°F | -0.6°C | 26.9 psig |
32°F | 0°C | 27.8 psig |
33°F | 0.6°C | 28.6 psig |
34°F | 1.1°C | 29.5 psig |
35°F | 1.7°C | 30.4 psig |
36°F | 2.2°C | 31.3 psig |
37°F | 2.8°C | 32.2 psig |
38°F | 3.3°C | 33.1 psig |
39°F | 3.9°C | 34.1 psig |
40°F | 4.4°C | 35.0 psig |
41°F | 5.0°C | 36.0 psig |
42°F | 5.6°C | 37.0 psig |
43°F | 6.1°C | 38.0 psig |
44°F | 6.7°C | 39.0 psig |
45°F | 7.2°C | 40.1 psig |
46°F | 7.8°C | 41.1 psig |
47°F | 8.3°C | 42.2 psig |
48°F | 8.9°C | 43.2 psig |
49°F | 9.4°C | 44.3 psig |
50°F | 10.0°C | 45.4 psig |
51°F | 10.6°C | 46.6 psig |
52°F | 11.1°C | 47.7 psig |
53°F | 11.7°C | 48.9 psig |
54°F | 12.2°C | 50.0 psig |
55°F | 12.8°C | 51.2 psig |
56°F | 13.3°C | 52.4 psig |
57°F | 13.9°C | 53.6 psig |
58°F | 14.4°C | 54.9 psig |
59°F | 15.0°C | 56.1 psig |
60°F | 15.6°C | 57.4 psig |
61°F | 16.1°C | 58.7 psig |
62°F | 16.7°C | 60.0 psig |
63°F | 17.2°C | 61.3 psig |
64°F | 17.8°C | 62.7 psig |
65°F | 18.3°C | 64.0 psig |
66°F | 18.9°C | 65.4 psig |
67°F | 19.4°C | 66.8 psig |
68°F | 20.0°C | 68.2 psig |
69°F | 20.6°C | 69.7 psig |
70°F | 21.1°C | 71.1 psig |
71°F | 21.7°C | 72.6 psig |
72°F | 22.2°C | 74.1 psig |
73°F | 22.8°C | 75.6 psig |
74°F | 23.3°C | 77.1 psig |
75°F | 23.9°C | 78.7 psig |
76°F | 24.4°C | 80.2 psig |
77°F | 25.0°C | 81.8 psig |
78°F | 25.6°C | 83.4 psig |
79°F | 26.1°C | 85.0 psig |
80°F | 26.7°C | 86.7 psig |
81°F | 27.2°C | 88.4 psig |
82°F | 27.8°C | 90.0 psig |
83°F | 28.3°C | 91.8 psig |
84°F | 29.4°C | 93.5 psig |
85°F | 30.0°C | 95.2 psig |
86°F | 30.6°C | 97.0 psig |
87°F | 31.1°C | 98.8 psig |
88°F | 31.7°C | 100.6 psig |
89°F | 31.7°C | 102.5 psig |
90°F | 32.2°C | 104.3 psig |
91°F | 32.8°C | 106.2 psig |
92°F | 33.3°C | 108.1 psig |
93°F | 33.9°C | 110.0 psig |
94°F | 34.4°C | 112.0 psig |
95°F | 35.0°C | 114.0 psig |
96°F | 35.6°C | 115.9 psig |
97°F | 36.1°C | 118.0 psig |
98°F | 36.7°C | 120.0 psig |
99°F | 37.2°C | 122.1 psig |
100°F | 37.8°C | 124.2 psig |
105°F | 40.6°C | 135.0 psig |
110°F | 43.3°C | 146.4 psig |
115°F | 46.1°C | 158.4 psig |
120°F | 48.9°C | 171.2 psig |
125°F | 51.7°C | 184.6 psig |
130°F | 54.4°C | 198.7 psig |
135°F | 57.2°C | 213.6 psig |
140°F | 60.0°C | 229.2 psig |
145°F | 62.8°C | 245.7 psig |
150°F | 65.6°C | 262.9 psig |
Here are some examples of how to read this chart:
What Is The Pressure Of R134A On 75 Degree Day?
You simply check the table above and see that the pressure of R134A on a 75-degree day is 78.7 psig.
What Is The Pressure Of R134A On 80 Degree Day?
You simply check the table above and see that the pressure of R134A on a 80-degree day is 86.7 psig.
What Is The Pressure Of R134A On 90 Degree Day?
You simply check the table above and see that the pressure of R134A on a 90-degree day is 104.3 psig.
What Is The Pressure Of R134A On 100 Degree Day?
You simply check the table above and see that the pressure of R134A on a 100-degree day is 124.2 psig.
R134A PT Chart PDF (Printable PDF For On-Site Use)
As promised, you can get the printable PDF version of the R134A PT chart here if you need it on-site:
All in all, you can now figure out what psi pressure does a 134A refrigerant have at all temperatures. You can check similar tables for:
Thank you for this chart. So that I can fallow the standard pressure for every temperature that I need. For repairing any kind of refrigeration using 134a prion.