R-32 PT chart

R-32 (difluoromethane) is a single-component refrigerant, classed A2L (lower flammability), used in many newer ductless and ducted systems. As a pure fluid it has one saturation pressure at each temperature.

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-32 saturation pressure by temperature, gauge pressure at sea level
°F	°C	psig	kPa gauge
−40	−40.0	11.0	76
−39	−39.4	11.7	81
−38	−38.9	12.4	85
−37	−38.3	13.0	90
−36	−37.8	13.7	95
−35	−37.2	14.4	100
−34	−36.7	15.2	105
−33	−36.1	15.9	110
−32	−35.6	16.6	115
−31	−35.0	17.4	120
−30	−34.4	18.2	125
−29	−33.9	19.0	131
−28	−33.3	19.8	136
−27	−32.8	20.6	142
−26	−32.2	21.5	148
−25	−31.7	22.3	154
−24	−31.1	23.2	160
−23	−30.6	24.1	166
−22	−30.0	25.0	172
−21	−29.4	25.9	178
−20	−28.9	26.8	185
−19	−28.3	27.8	191
−18	−27.8	28.7	198
−17	−27.2	29.7	205
−16	−26.7	30.7	212
−15	−26.1	31.7	219
−14	−25.6	32.8	226
−13	−25.0	33.8	233
−12	−24.4	34.9	241
−11	−23.9	36.0	248
−10	−23.3	37.1	256
−9	−22.8	38.2	264
−8	−22.2	39.4	271
−7	−21.7	40.5	280
−6	−21.1	41.7	288
−5	−20.6	42.9	296
−4	−20.0	44.2	304
−3	−19.4	45.4	313
−2	−18.9	46.7	322
−1	−18.3	47.9	331
0	−17.8	49.3	340
1	−17.2	50.6	349
2	−16.7	51.9	358
3	−16.1	53.3	367
4	−15.6	54.7	377
5	−15.0	56.1	387
6	−14.4	57.5	397
7	−13.9	59.0	407
8	−13.3	60.5	417
9	−12.8	62.0	427
10	−12.2	63.5	438
11	−11.7	65.0	448
12	−11.1	66.6	459
13	−10.6	68.2	470
14	−10.0	69.8	481
15	−9.4	71.4	493
16	−8.9	73.1	504
17	−8.3	74.8	516
18	−7.8	76.5	528
19	−7.2	78.3	540
20	−6.7	80.0	552
21	−6.1	81.8	564
22	−5.6	83.6	577
23	−5.0	85.5	589
24	−4.4	87.3	602
25	−3.9	89.2	615
26	−3.3	91.1	628
27	−2.8	93.1	642
28	−2.2	95.1	655
29	−1.7	97.1	669
30	−1.1	99.1	683
31	−0.6	101.2	697
32	0.0	103.2	712
33	0.6	105.3	726
34	1.1	107.5	741
35	1.7	109.7	756
36	2.2	111.9	771
37	2.8	114.1	787
38	3.3	116.3	802
39	3.9	118.6	818
40	4.4	121.0	834
41	5.0	123.3	850
42	5.6	125.7	867
43	6.1	128.1	883
44	6.7	130.5	900
45	7.2	133.0	917
46	7.8	135.5	934
47	8.3	138.0	952
48	8.9	140.6	969
49	9.4	143.2	987
50	10.0	145.8	1006
51	10.6	148.5	1024
52	11.1	151.2	1043
53	11.7	153.9	1061
54	12.2	156.7	1081
55	12.8	159.5	1100
56	13.3	162.4	1119
57	13.9	165.2	1139
58	14.4	168.1	1159
59	15.0	171.1	1179
60	15.6	174.0	1200
61	16.1	177.1	1221
62	16.7	180.1	1242
63	17.2	183.2	1263
64	17.8	186.3	1285
65	18.3	189.5	1306
66	18.9	192.7	1328
67	19.4	195.9	1351
68	20.0	199.2	1373
69	20.6	202.5	1396
70	21.1	205.8	1419
71	21.7	209.2	1442
72	22.2	212.6	1466
73	22.8	216.1	1490
74	23.3	219.6	1514
75	23.9	223.2	1539
76	24.4	226.7	1563
77	25.0	230.4	1588
78	25.6	234.0	1614
79	26.1	237.7	1639
80	26.7	241.5	1665
81	27.2	245.3	1691
82	27.8	249.1	1718
83	28.3	253.0	1744
84	28.9	256.9	1771
85	29.4	260.9	1799
86	30.0	264.9	1826
87	30.6	268.9	1854
88	31.1	273.0	1882
89	31.7	277.1	1911
90	32.2	281.3	1940
91	32.8	285.5	1969
92	33.3	289.8	1998
93	33.9	294.1	2028
94	34.4	298.5	2058
95	35.0	302.9	2089
96	35.6	307.4	2119
97	36.1	311.9	2150
98	36.7	316.4	2182
99	37.2	321.0	2213
100	37.8	325.7	2245
101	38.3	330.4	2278
102	38.9	335.1	2311
103	39.4	339.9	2344
104	40.0	344.8	2377
105	40.6	349.6	2411
106	41.1	354.6	2445
107	41.7	359.6	2479
108	42.2	364.6	2514
109	42.8	369.7	2549
110	43.3	374.9	2585
111	43.9	380.1	2621
112	44.4	385.3	2657
113	45.0	390.7	2693
114	45.6	396.0	2730
115	46.1	401.4	2768
116	46.7	406.9	2806
117	47.2	412.4	2844
118	47.8	418.0	2882
119	48.3	423.7	2921
120	48.9	429.3	2960
121	49.4	435.1	3000
122	50.0	440.9	3040
123	50.6	446.8	3080
124	51.1	452.7	3121
125	51.7	458.7	3162
126	52.2	464.7	3204
127	52.8	470.8	3246
128	53.3	477.0	3289
129	53.9	483.2	3332
130	54.4	489.5	3375
131	55.0	495.8	3419
132	55.6	502.2	3463
133	56.1	508.7	3507
134	56.7	515.2	3552
135	57.2	521.8	3598
136	57.8	528.5	3644
137	58.3	535.2	3690
138	58.9	542.0	3737
139	59.4	548.8	3784
140	60.0	555.8	3832
141	60.6	562.8	3880
142	61.1	569.8	3929
143	61.7	576.9	3978
144	62.2	584.1	4028
145	62.8	591.4	4078
146	63.3	598.7	4128
147	63.9	606.2	4179
148	64.4	613.6	4231
149	65.0	621.2	4283
150	65.6	628.8	4336

Reading the chart

Each row is the pressure at which R-32 boils or condenses at that temperature. A negative gauge pressure is a vacuum.
R-32 is a single-component refrigerant, so liquid and vapor saturate at the same pressure.
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.