R-410A pressure-temperature chart

Gauge pressure at sea level. Liquid (bubble) pressure is the one to use for subcooling and vapor (dew) pressure for superheat.

°F and psig°C and kPa

R-410A saturation pressure by temperature, °F and psig
°F	Liquid (bubble) psig	Vapor (dew) psig
-40	10.8	10.7
-39	11.4	11.3
-38	12.1	12.0
-37	12.7	12.6
-36	13.4	13.3
-35	14.1	14.0
-34	14.8	14.7
-33	15.6	15.5
-32	16.3	16.2
-31	17.1	16.9
-30	17.8	17.7
-29	18.6	18.5
-28	19.4	19.3
-27	20.2	20.1
-26	21.0	20.9
-25	21.9	21.8
-24	22.7	22.6
-23	23.6	23.5
-22	24.5	24.4
-21	25.4	25.3
-20	26.3	26.2
-19	27.3	27.1
-18	28.2	28.1
-17	29.2	29.0
-16	30.2	30.0
-15	31.2	31.0
-14	32.2	32.0
-13	33.2	33.1
-12	34.3	34.1
-11	35.4	35.2
-10	36.5	36.3
-9	37.6	37.4
-8	38.7	38.5
-7	39.9	39.7
-6	41.0	40.8
-5	42.2	42.0
-4	43.4	43.2
-3	44.6	44.4
-2	45.9	45.7
-1	47.2	46.9
0	48.4	48.2
1	49.7	49.5
2	51.1	50.8
3	52.4	52.2
4	53.8	53.5
5	55.2	54.9
6	56.6	56.3
7	58.0	57.8
8	59.5	59.2
9	60.9	60.7
10	62.4	62.2
11	63.9	63.7
12	65.5	65.2
13	67.1	66.8
14	68.6	68.4
15	70.3	70.0
16	71.9	71.6
17	73.5	73.3
18	75.2	74.9
19	76.9	76.6
20	78.7	78.4
21	80.4	80.1
22	82.2	81.9
23	84.0	83.7
24	85.8	85.5
25	87.7	87.4
26	89.6	89.2
27	91.5	91.1
28	93.4	93.1
29	95.4	95.0
30	97.4	97.0
31	99.4	99.0
32	101.4	101.1
33	103.5	103.1
34	105.6	105.2
35	107.7	107.3
36	109.9	109.5
37	112.1	111.7
38	114.3	113.9
39	116.5	116.1
40	118.8	118.4
41	121.1	120.6
42	123.4	123.0
43	125.8	125.3
44	128.2	127.7
45	130.6	130.1
46	133.0	132.6
47	135.5	135.0
48	138.0	137.5
49	140.6	140.1
50	143.1	142.6
51	145.8	145.2
52	148.4	147.9
53	151.1	150.5
54	153.8	153.2
55	156.5	156.0
56	159.3	158.7
57	162.1	161.5
58	164.9	164.4
59	167.8	167.2
60	170.7	170.1
61	173.7	173.1
62	176.6	176.0
63	179.6	179.0
64	182.7	182.1
65	185.8	185.1
66	188.9	188.3
67	192.0	191.4
68	195.2	194.6
69	198.5	197.8
70	201.7	201.1
71	205.0	204.4
72	208.4	207.7
73	211.8	211.1
74	215.2	214.5
75	218.6	217.9
76	222.1	221.4
77	225.7	224.9
78	229.2	228.5
79	232.9	232.1
80	236.5	235.7
81	240.2	239.4
82	243.9	243.2
83	247.7	246.9
84	251.5	250.7
85	255.4	254.6
86	259.3	258.5
87	263.2	262.4
88	267.2	266.4
89	271.3	270.4
90	275.3	274.5
91	279.5	278.6
92	283.6	282.7
93	287.8	286.9
94	292.1	291.2
95	296.4	295.4
96	300.7	299.8
97	305.1	304.1
98	309.5	308.6
99	314.0	313.0
100	318.5	317.6
101	323.1	322.1
102	327.7	326.7
103	332.4	331.4
104	337.1	336.1
105	341.9	340.8
106	346.7	345.7
107	351.6	350.5
108	356.5	355.4
109	361.4	360.4
110	366.5	365.4
111	371.5	370.4
112	376.6	375.5
113	381.8	380.7
114	387.0	385.9
115	392.3	391.2
116	397.6	396.5
117	403.0	401.9
118	408.4	407.3
119	413.9	412.8
120	419.5	418.3
121	425.1	423.9
122	430.7	429.6
123	436.4	435.3
124	442.2	441.0
125	448.0	446.8
126	453.9	452.7
127	459.9	458.7
128	465.9	464.7
129	471.9	470.7
130	478.0	476.8
131	484.2	483.0
132	490.5	489.3
133	496.8	495.6
134	503.1	501.9
135	509.5	508.4
136	516.0	514.9
137	522.6	521.4
138	529.2	528.0
139	535.9	534.7
140	542.6	541.5
141	549.4	548.3
142	556.3	555.2
143	563.3	562.2
144	570.3	569.2
145	577.4	576.3
146	584.5	583.5
147	591.8	590.8
148	599.1	598.1
149	606.4	605.5
150	613.9	613.0

R-410A saturation pressure by temperature, °C and kPa
°C	Liquid (bubble) kPa	Vapor (dew) kPa
-40	74	74
-39	82	82
-38	91	90
-37	99	99
-36	108	108
-35	118	117
-34	127	126
-33	137	136
-32	147	147
-31	158	157
-30	169	168
-29	180	179
-28	192	191
-27	204	203
-26	216	215
-25	229	228
-24	242	241
-23	256	255
-22	270	269
-21	285	283
-20	299	298
-19	315	313
-18	330	329
-17	347	345
-16	363	362
-15	380	379
-14	398	396
-13	416	414
-12	435	433
-11	454	452
-10	473	471
-9	493	491
-8	514	512
-7	535	533
-6	557	555
-5	579	577
-4	602	600
-3	626	623
-2	650	647
-1	674	672
0	699	697
1	725	723
2	752	749
3	779	776
4	806	804
5	835	832
6	864	861
7	894	890
8	924	921
9	955	952
10	987	983
11	1,019	1,016
12	1,053	1,049
13	1,087	1,083
14	1,121	1,118
15	1,157	1,153
16	1,193	1,189
17	1,230	1,226
18	1,268	1,264
19	1,307	1,302
20	1,346	1,342
21	1,386	1,382
22	1,427	1,423
23	1,469	1,465
24	1,512	1,507
25	1,556	1,551
26	1,600	1,595
27	1,646	1,641
28	1,692	1,687
29	1,740	1,734
30	1,788	1,782
31	1,837	1,831
32	1,887	1,881
33	1,938	1,932
34	1,990	1,984
35	2,043	2,037
36	2,097	2,091
37	2,153	2,146
38	2,209	2,202
39	2,266	2,259
40	2,324	2,317
41	2,384	2,377
42	2,444	2,437
43	2,506	2,498
44	2,569	2,561
45	2,632	2,625
46	2,697	2,690
47	2,764	2,756
48	2,831	2,823
49	2,900	2,892
50	2,970	2,962
51	3,041	3,033
52	3,113	3,105
53	3,187	3,179
54	3,262	3,254
55	3,339	3,330
56	3,416	3,408
57	3,495	3,487
58	3,576	3,568
59	3,658	3,650
60	3,741	3,734
61	3,826	3,819
62	3,913	3,905
63	4,001	3,994
64	4,090	4,083
65	4,181	4,175

You're free to reuse this chart's numbers under CC BY 4.0. Just credit Pocket HVAC and link back to this page.

From pockethvac.com/r410a-pt-chart/. Each row is solved at its exact temperature with CoolProp 8.0.0. Free to reuse under CC BY 4.0.

What is an R-410A PT chart?

An R-410A PT chart lists the pressure R-410A boils and condenses at for each temperature. At 40°F that's 118.4 psig on the vapor (dew) side and 118.8 psig on the liquid (bubble) side, only 0.4 psi apart because its glide is so small. You'll also see R-410A sold as Puron (Carrier's name for it), Freon 410A, Forane 410A, Genetron AZ-20 and Klea 410A.

Anywhere liquid and vapor are together in a system, like inside the evaporator and condenser coils, the pressure and temperature are locked together, so one tells you the other. On the job, the chart turns gauge readings into saturation temperatures: the suction pressure gives the temperature the evaporator is boiling at, and the liquid line pressure gives the temperature the condenser is condensing at. Compare those with your line temperatures and you have superheat and subcooling.

R-410A is a blend of R-32 and R-125, and it's nonflammable (safety class A1). It replaced R-22 in new home air conditioners and heat pumps, and it's now being replaced itself by R-454B and R-32 in new equipment.

How it's calculated

Absolute pressure = gauge pressure + 14.696 psi (101.325 kPa, one standard atmosphere)
Saturation data: R-410A: CoolProp 8.0.0, R410A
Between table points (every 0.5 °C): ln(pressure) is interpolated linearly in 1 ÷ absolute temperature
Blends have separate liquid (bubble) and vapor (dew) curves
Glide = dew temperature − bubble temperature at the same pressure
Printed chart rows are solved by CoolProp at each exact temperature

Sources

If a number doesn't match your chart, email me what you entered and what you expected, and I'll check it against the source. You can also read how the numbers are checked.

Checked by Paul Williams · Updated October 31, 2026

Questions

What is the R-410A pressure at 40°F?

At 40°F, R-410A saturates at 118.4 psig on the vapor (dew) side and 118.8 psig on the liquid (bubble) side. At 100°F it's 317.6 psig vapor and 318.5 psig liquid.

Why are there two columns for R-410A?

R-410A is a blend of R-32 and R-125, 50/50 by weight. Blends boil over a small temperature range called glide, so the liquid and vapor pressures differ. For R-410A the glide is only about 0.2°F, so the two columns stay within about 1 psi of each other. Use the vapor column for superheat and the liquid column for subcooling.

How accurate is this chart?

It comes from NIST's equation of state for R-410A (Lemmon, 2003) through CoolProp. It matches Arkema's Forane 410A tables, which use NIST REFPROP, to within 0.15 psi on every row from -40 to 150°F.

R-410A PT Chart