R-410A PT chart

R-410A is a near-azeotropic blend of R-32 and R-125 used in most U.S. air conditioners and heat pumps built from 2010 until the move to lower-GWP refrigerants. Its dew and bubble points differ by only about 0.2 °F, so the chart lists both: use the dew-point column for superheat and the bubble-point column for subcooling.

Gauge pressures at sea level (14.696 psia). At altitude a gauge reads higher for the same temperature — use the PT calculator with your elevation. Generated with CoolProp 8.0.0 on 2026-10-25; how it was checked.

R-410A saturation pressure by temperature, gauge pressure at sea level, dew point and bubble point
°F	°C	psig, dew (vapor)	psig, bubble (liquid)	kPa gauge
−40	−40.0	10.7	10.8	74
−39	−39.4	11.3	11.4	78
−38	−38.9	12.0	12.1	83
−37	−38.3	12.6	12.7	87
−36	−37.8	13.3	13.4	92
−35	−37.2	14.0	14.1	97
−34	−36.7	14.7	14.8	102
−33	−36.1	15.5	15.6	107
−32	−35.6	16.2	16.3	112
−31	−35.0	16.9	17.1	117
−30	−34.4	17.7	17.8	122
−29	−33.9	18.5	18.6	127
−28	−33.3	19.3	19.4	133
−27	−32.8	20.1	20.2	139
−26	−32.2	20.9	21.0	144
−25	−31.7	21.8	21.9	150
−24	−31.1	22.6	22.7	156
−23	−30.6	23.5	23.6	162
−22	−30.0	24.4	24.5	168
−21	−29.4	25.3	25.4	174
−20	−28.9	26.2	26.3	181
−19	−28.3	27.1	27.3	187
−18	−27.8	28.1	28.2	194
−17	−27.2	29.0	29.2	200
−16	−26.7	30.0	30.2	207
−15	−26.1	31.0	31.2	214
−14	−25.6	32.0	32.2	221
−13	−25.0	33.1	33.2	228
−12	−24.4	34.1	34.3	235
−11	−23.9	35.2	35.4	243
−10	−23.3	36.3	36.5	250
−9	−22.8	37.4	37.6	258
−8	−22.2	38.5	38.7	266
−7	−21.7	39.7	39.9	274
−6	−21.1	40.8	41.0	282
−5	−20.6	42.0	42.2	290
−4	−20.0	43.2	43.4	298
−3	−19.4	44.4	44.6	306
−2	−18.9	45.7	45.9	315
−1	−18.3	46.9	47.2	324
0	−17.8	48.2	48.4	332
1	−17.2	49.5	49.7	341
2	−16.7	50.8	51.1	351
3	−16.1	52.2	52.4	360
4	−15.6	53.5	53.8	369
5	−15.0	54.9	55.2	379
6	−14.4	56.3	56.6	388
7	−13.9	57.8	58.0	398
8	−13.3	59.2	59.5	408
9	−12.8	60.7	60.9	418
10	−12.2	62.2	62.4	429
11	−11.7	63.7	63.9	439
12	−11.1	65.2	65.5	450
13	−10.6	66.8	67.1	460
14	−10.0	68.4	68.6	471
15	−9.4	70.0	70.3	482
16	−8.9	71.6	71.9	494
17	−8.3	73.3	73.5	505
18	−7.8	74.9	75.2	517
19	−7.2	76.6	76.9	528
20	−6.7	78.4	78.7	540
21	−6.1	80.1	80.4	552
22	−5.6	81.9	82.2	565
23	−5.0	83.7	84.0	577
24	−4.4	85.5	85.8	590
25	−3.9	87.4	87.7	602
26	−3.3	89.2	89.6	615
27	−2.8	91.1	91.5	628
28	−2.2	93.1	93.4	642
29	−1.7	95.0	95.4	655
30	−1.1	97.0	97.4	669
31	−0.6	99.0	99.4	683
32	0.0	101.1	101.4	697
33	0.6	103.1	103.5	711
34	1.1	105.2	105.6	725
35	1.7	107.3	107.7	740
36	2.2	109.5	109.9	755
37	2.8	111.7	112.1	770
38	3.3	113.9	114.3	785
39	3.9	116.1	116.5	800
40	4.4	118.4	118.8	816
41	5.0	120.7	121.1	832
42	5.6	123.0	123.4	848
43	6.1	125.3	125.8	864
44	6.7	127.7	128.2	880
45	7.2	130.1	130.6	897
46	7.8	132.6	133.0	914
47	8.3	135.0	135.5	931
48	8.9	137.5	138.0	948
49	9.4	140.1	140.6	966
50	10.0	142.6	143.1	983
51	10.6	145.2	145.8	1001
52	11.1	147.9	148.4	1020
53	11.7	150.5	151.1	1038
54	12.2	153.2	153.8	1057
55	12.8	156.0	156.5	1075
56	13.3	158.7	159.3	1094
57	13.9	161.5	162.1	1114
58	14.4	164.4	164.9	1133
59	15.0	167.2	167.8	1153
60	15.6	170.1	170.7	1173
61	16.1	173.1	173.7	1193
62	16.7	176.0	176.6	1214
63	17.2	179.0	179.6	1234
64	17.8	182.1	182.7	1255
65	18.3	185.1	185.8	1277
66	18.9	188.3	188.9	1298
67	19.4	191.4	192.0	1320
68	20.0	194.6	195.2	1342
69	20.6	197.8	198.5	1364
70	21.1	201.1	201.7	1386
71	21.7	204.4	205.0	1409
72	22.2	207.7	208.4	1432
73	22.8	211.1	211.8	1455
74	23.3	214.5	215.2	1479
75	23.9	217.9	218.6	1502
76	24.4	221.4	222.1	1527
77	25.0	224.9	225.7	1551
78	25.6	228.5	229.2	1575
79	26.1	232.1	232.9	1600
80	26.7	235.7	236.5	1625
81	27.2	239.4	240.2	1651
82	27.8	243.2	243.9	1676
83	28.3	246.9	247.7	1702
84	28.9	250.7	251.5	1729
85	29.4	254.6	255.4	1755
86	30.0	258.5	259.3	1782
87	30.6	262.4	263.2	1809
88	31.1	266.4	267.2	1837
89	31.7	270.4	271.3	1864
90	32.2	274.5	275.3	1892
91	32.8	278.6	279.5	1921
92	33.3	282.7	283.6	1949
93	33.9	286.9	287.8	1978
94	34.4	291.2	292.1	2007
95	35.0	295.4	296.4	2037
96	35.6	299.8	300.7	2067
97	36.1	304.1	305.1	2097
98	36.7	308.6	309.5	2128
99	37.2	313.0	314.0	2158
100	37.8	317.6	318.5	2189
101	38.3	322.1	323.1	2221
102	38.9	326.7	327.7	2253
103	39.4	331.4	332.4	2285
104	40.0	336.1	337.1	2317
105	40.6	340.8	341.9	2350
106	41.1	345.7	346.7	2383
107	41.7	350.5	351.6	2417
108	42.2	355.4	356.5	2450
109	42.8	360.4	361.4	2485
110	43.3	365.4	366.5	2519
111	43.9	370.4	371.5	2554
112	44.4	375.5	376.6	2589
113	45.0	380.7	381.8	2625
114	45.6	385.9	387.0	2661
115	46.1	391.2	392.3	2697
116	46.7	396.5	397.6	2734
117	47.2	401.9	403.0	2771
118	47.8	407.3	408.4	2808
119	48.3	412.8	413.9	2846
120	48.9	418.3	419.5	2884
121	49.4	423.9	425.1	2923
122	50.0	429.6	430.7	2962
123	50.6	435.3	436.4	3001
124	51.1	441.0	442.2	3041
125	51.7	446.8	448.0	3081
126	52.2	452.7	453.9	3121
127	52.8	458.7	459.9	3162
128	53.3	464.7	465.9	3204
129	53.9	470.7	471.9	3245
130	54.4	476.8	478.0	3288
131	55.0	483.0	484.2	3330
132	55.6	489.3	490.5	3373
133	56.1	495.6	496.8	3417
134	56.7	501.9	503.1	3461
135	57.2	508.4	509.5	3505
136	57.8	514.9	516.0	3550
137	58.3	521.4	522.6	3595
138	58.9	528.0	529.2	3641
139	59.4	534.7	535.9	3687
140	60.0	541.5	542.6	3734
141	60.6	548.3	549.4	3781
142	61.1	555.2	556.3	3828
143	61.7	562.2	563.3	3876
144	62.2	569.2	570.3	3925
145	62.8	576.3	577.4	3974
146	63.3	583.5	584.5	4023
147	63.9	590.8	591.8	4073
148	64.4	598.1	599.1	4124
149	65.0	605.5	606.4	4175
150	65.6	613.0	613.9	4227

Reading the chart

Each row is the pressure at which R-410A boils or condenses at that temperature. A negative gauge pressure is a vacuum.
R-410A is a blend, so the vapor (dew-point) and liquid (bubble-point) pressures differ slightly. Use the dew column with suction readings and the bubble column with liquid-line readings.
To work out superheat or subcooling from your readings, use the Superheat and Subcooling Calculator.
Charge equipment to the manufacturer’s procedure and targets. Only certified technicians may handle refrigerant.