R410A PT Chart: -60°F To +155°F Pressure Temperature Chart

R410A is one of the most commonly used refrigerants. It’s patented by Honeywell, and known under several other names such as “AZ-20”, “Genetron R410A”, “Puron”, and so on. It’s the preferred freon for residential air conditioners, replacing the older R22 according to the Montreal Protocol and subsequently phasing out of R22.

To properly use it, you need an R410A PT chart (we also provide you with a printable PDF R410A PT chart at the end of the article). This is a pressure-temperature chart that specifies the saturation pressure for R410A at any given temperature. The R410A PT chart can be used to answer questions like:

What are normal operating pressures for 410A?

What is the pressure of r410a at 72 degrees Fahrenheit?

What should gauge read for 410A?

You can also use the R-410A PT chart to adequately calculate the superheat, total superheat, and subcooling temperatures.

Below you will find two charts: 410A chart for degrees Fahrenheit (°F) and 410A chart for degrees Celsius (°C).

Here is the full 410A PT chart for a liquid state measured on a liquid line at the service valve (after the chart, you can also find useful R410A PT examples and graphs):

410A PT Chart For Degrees Of Fahrenheit (°F)

Temperature (°F) Pressure (psig)
-60 °F 0.9 psig
-55 °F 1.8 psig
-50 °F 4.3 psig
-45 °F 7.0 psig
-40 °F 10.1 psig
-35 °F 13.5 psig
-30 °F 17.2 psig
-25 °F 21.4 psig
-20 °F 25.9 psig
-18 °F 27.8 psig
-16 °F 29.7 psig
-14 °F 31.8 psig
-12 °F 33.9 psig
-10 °F 36.1 psig
-8 °F 38.4 psig
-6 °F 40.7 psig
-4 °F 43.1 psig
-2 °F 45.6 psig
0 °F 48.2 psig
1 °F 49.5 psig
2 °F 50.9 psig
3 °F 52.2 psig
4 °F 53.6 psig
5 °F 55.0 psig
6 °F 56.4 psig
7 °F 57.9 psig
8 °F 59.3 psig
9 °F 60.8 psig
10 °F 62.3 psig
11 °F 63.9 psig
12 °F 65.4 psig
13 °F 67.0 psig
14 °F 68.6 psig
15 °F 70.2 psig
16 °F 71.9 psig
17 °F 73.5 psig
18 °F 40.9 psig
19 °F 77.0 psig
20 °F 78.7 psig
21 °F 80.5 psig
22 °F 82.3 psig
23 °F 84.1 psig
24 °F 85.9 psig
25 °F 87.8 psig
26 °F 89.7 psig
27 °F 91.6 psig
28 °F 93.5 psig
29 °F 95.5 psig
30 °F 97.5 psig
31 °F 99.5 psig
32 °F 101.6 psig
33 °F 103.6 psig
34 °F 105.7 psig
35 °F 107.9 psig
36 °F 110.0 psig
37 °F 112.2 psig
38 °F 114.4 psig
39 °F 116.7 psig
40 °F 118.9 psig
41 °F 121.2 psig
42 °F 123.6 psig
43 °F 125.9 psig
44 °F 128.3 psig
45 °F 130.7 psig
46 °F 133.2 psig
47 °F 135.6 psig
48 °F 138.2 psig
49 °F 140.7 psig
50 °F 143.3 psig
55 °F 156.6 psig
60 °F 170.7 psig
65 °F 185.7 psig
70 °F 201.5 psig
75 °F 218.2 psig
80 °F 235.9 psig
90 °F 274.3 psig
95 °F 295.0 psig
100 °F 316.9 psig
105 °F 339.9 psig
110 °F 364.1 psig
115 °F 389.6 psig
120 °F 416.4 psig
125 °F 444.5 psig
130 °F 474.0 psig
135 °F 505.0 psig
140 °F 537.6 psig
145 °F 571.7 psig
150 °F 607.6 psig
155 °F 645.2 psig

You can see that this R410A pressure chart includes high and low side pressures at temperatures ranging from -60 °F to 155 °F. Higher temperature equates to higher pressure.

Here are 4 examples of how you can use this chart:

Example 1: What is the pressure of r410a at 72 degrees Fahrenheit? We can see that at 72°F, the R410A pressure is 208,4 psig.

Example 2: What are 410A pressures on an 85 degree day?

The operating pressure of 410A on an 85 degree day is 254.6 psig.

Example 3: What are 410A pressures on a 70 degree day?

The operating pressure of 410A on a 70 degree day is 201.5 psig.

Example 4: What are 410A pressures on a 65 degree day?

The operating pressure of 410A on 65-degree day is 185.7 psig.

R410A Pressure-Temperature Chart For Degrees Of Celsius (°C)

Temperature (°C) Pressure (barA) Pressure (barg) Pressure (psig)
-70 °C 0,36 barA -0,66 barg -9,52 psig
-68 °C 0,40 barA -0,61 barg -8,85 psig
-66 °C 0,45 barA -0,56 barg -8,10 psig
-64 °C 0,51 barA -0,50 barg -7,27 psig
-62 °C 0,57 barA -0,44 barg -6,37 psig
-60 °C 0,64 barA -0,37 barg -5,37 psig
-58 °C 0,72 barA -0,30 barg -4,29 psig
-56 °C 0,80 barA -0,21 barg -3,10 psig
-54 °C 0,89 barA -0,12 barg -1,81 psig
-52 °C 0,98 barA -0,03 barg -0,41 psig
-50 °C 1,09 barA 0,08 barg 1,11 psig
-48 °C 1,20 barA 0,19 barg 2,76 psig
-46 °C 1,33 barA 0,31 barg 4,54 psig
-44 °C 1,46 barA 0,45 barg 6,46 psig
-42 °C 1,60 barA 0,59 barg 8,53 psig
-40 °C 1,76 barA 0,74 barg 10,76 psig
-38 °C 1,92 barA 0,91 barg 13,15 psig
-36 °C 2,10 barA 1,08 barg 15,71 psig
-34 °C 2,29 barA 1,27 barg 18,45 psig
-32 °C 2,49 barA 1,47 barg 21,38 psig
-30 °C 2,70 barA 1,69 barg 24,51 psig
-28 °C 2,93 barA 1,92 barg 27,84 psig
-26 °C 3,18 barA 2,16 barg 31,38 psig
-24 °C 3,44 barA 2,42 barg 35,16 psig
-22 °C 3,71 barA 2,70 barg 39,16 psig
-20 °C 4,01 barA 2,99 barg 43,41 psig
-18 °C 4,32 barA 3,30 barg 47,91 psig
-16 °C 4,65 barA 3,63 barg 52,67 psig
-14 °C 4,99 barA 3,98 barg 57,70 psig
-12 °C 5,36 barA 4,35 barg 63,02 psig
-10 °C 5,75 barA 4,73 barg 68,63 psig
-8 °C 6,15 barA 5,14 barg 74,54 psig
-6 °C 6,58 barA 5,57 barg 80,76 psig
-4 °C 7,03 barA 6,02 barg 87,31 psig
-2 °C 7,51 barA 6,50 barg 94,19 psig
0 °C 8,01 barA 6,99 barg 101,42 psig
2 °C 8,53 barA 7,52 barg 109,00 psig
4 °C 9,08 barA 8,07 barg 116,95 psig
6 °C 9,65 barA 8,64 barg 125,28 psig
8 °C 10,25 barA 9,24 barg 133,99 psig
10 °C 10,88 barA 9,87 barg 143,13 psig
12 °C 11,54 barA 10,53 barg 152,66 psig
14 °C 12,23 barA 11,22 barg 162,63 psig
16 °C 12,95 barA 11,93 barg 173,03 psig
18 °C 13,70 barA 12,68 barg 183,89 psig
20 °C 14,48 barA 13,48 barg 195,21 psig
22 °C 15,29 barA 14,28 barg 207,02 psig
24 °C 16,14 barA 15,13 barg 219,31 psig
26 °C 17,02 barA 16,01 barg 232,10 psig
28 °C 17,94 barA 16,93 barg 245,41 psig
30 °C 18,89 barA 17,88 barg 259,26 psig
32 °C 19,89 barA 18,87 barg 273,66 psig
34 °C 20,92 barA 19,91 barg 288,62 psig
36 °C 21,99 barA 20,98 barg 304,15 psig
38 °C 23,10 barA 22,09 barg 320,49 psig
40 °C 24,26 barA 23,24 barg 337,02 psig
42 °C 25,45 barA 24,44 barg 354,29 psig
44 °C 26,70 barA 25,68 barg 372,42 psig
46 °C 27,99 barA 26,97 barg 391,09 psig
48 °C 29,32 barA 28,31 barg 410,47 psig
50 °C 30,71 barA 29,69 barg 430,55 psig
52 °C 32,14 barA 31,13 barg 451,34 psig
54 °C 33,63 barA 32,61 barg 472,90 psig
56 °C 35,17 barA 34,16 barg 495,25 psig
58 °C 36,76 barA 35,75 barg 518,39 psig
60 °C 38,42 barA 37,41 barg 542,37 psig
62 °C 40,13 barA 39,12 barg 567,24 psig
64 °C 41,91 barA 40,90 barg 593,02 psig
66 °C 43,75 barA 42,74 barg 619,74 psig
68 °C 45,67 barA 44,66 barg 647,5 psig
70 °C 47,65 barA 46,64 barg 676,28 psig

As you can, the pressure at a specific temperature is usually given in 3 different units:

  • barA. Known as “absolute pressure“; pressure against a perfect vacuum. It’s calculated as Gauge Pressure + Atmospheric Pressure. The standard atmospheric pressure of 101,3 Pa or 14,7 psi is used. Hence, the barA unit is equal to Gauge Pressure + 14,7 psi.
  • barg. Used to describe R410A gauge pressure; it’s commonly referred to as “2-bar gauge pressure” in HVAC literature.
  • psig. Pounds Per Square Inch (psig) is most commonly used to express pressure levels at a specific temperature for R410A refrigerant. In universal units, 1 psi equals to about 6895 N/m2.

Usually you can get these R410A PT charts with every R410A refrigerant. For some people, using a graph instead of a chart is easier. Here is the Celsius-to-barA graph for R410A:

R410A PT Graph (Celsius-to-barA)

If you’re more comfortable using degrees Fahrenheit, you can also use a Fahrenheit-to-barA graph:

Hopefully these two graphs will help some people to figure out the saturation points for the R410A refrigerant.

R410A PT Chart PDF (Printable PDF For On-Site Use)

As promised, you can get the printable PDF version of the R410A PT chart here if you need it on-site. In the US, you will need this pressure chart in degrees Fahrenheit:

In the rest of the world (Europe, Asia, and so on), you will need this pressure chart in degrees Celsius:

You can print these two charts and carry them along, consulting them when needed. You can check these PT charts for other refrigerants as well:

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