R-32 pressure-temperature chart

Gauge pressure at sea level. R-32 is a single-component refrigerant, so liquid and vapor saturate at the same pressure.

°F and psig°C and kPa

R-32 saturation pressure by temperature, °F and psig
°F	psig
-40	11.0
-39	11.7
-38	12.4
-37	13.0
-36	13.7
-35	14.4
-34	15.2
-33	15.9
-32	16.6
-31	17.4
-30	18.2
-29	19.0
-28	19.8
-27	20.6
-26	21.5
-25	22.3
-24	23.2
-23	24.1
-22	25.0
-21	25.9
-20	26.8
-19	27.8
-18	28.7
-17	29.7
-16	30.7
-15	31.7
-14	32.8
-13	33.8
-12	34.9
-11	36.0
-10	37.1
-9	38.2
-8	39.4
-7	40.5
-6	41.7
-5	42.9
-4	44.2
-3	45.4
-2	46.7
-1	47.9
0	49.3
1	50.6
2	51.9
3	53.3
4	54.7
5	56.1
6	57.5
7	59.0
8	60.5
9	62.0
10	63.5
11	65.0
12	66.6
13	68.2
14	69.8
15	71.4
16	73.1
17	74.8
18	76.5
19	78.3
20	80.0
21	81.8
22	83.6
23	85.5
24	87.3
25	89.2
26	91.1
27	93.1
28	95.1
29	97.1
30	99.1
31	101.1
32	103.2
33	105.3
34	107.5
35	109.7
36	111.9
37	114.1
38	116.3
39	118.6
40	121.0
41	123.3
42	125.7
43	128.1
44	130.5
45	133.0
46	135.5
47	138.0
48	140.6
49	143.2
50	145.8
51	148.5
52	151.2
53	153.9
54	156.7
55	159.5
56	162.4
57	165.2
58	168.1
59	171.1
60	174.0
61	177.1
62	180.1
63	183.2
64	186.3
65	189.5
66	192.7
67	195.9
68	199.2
69	202.5
70	205.8
71	209.2
72	212.6
73	216.1
74	219.6
75	223.2
76	226.7
77	230.4
78	234.0
79	237.7
80	241.5
81	245.3
82	249.1
83	253.0
84	256.9
85	260.9
86	264.9
87	268.9
88	273.0
89	277.1
90	281.3
91	285.5
92	289.8
93	294.1
94	298.5
95	302.9
96	307.4
97	311.9
98	316.4
99	321.0
100	325.7
101	330.4
102	335.1
103	339.9
104	344.8
105	349.6
106	354.6
107	359.6
108	364.6
109	369.7
110	374.9
111	380.1
112	385.3
113	390.7
114	396.0
115	401.4
116	406.9
117	412.4
118	418.0
119	423.6
120	429.3
121	435.1
122	440.9
123	446.8
124	452.7
125	458.7
126	464.7
127	470.8
128	477.0
129	483.2
130	489.5
131	495.8
132	502.2
133	508.7
134	515.2
135	521.8
136	528.5
137	535.2
138	542.0
139	548.8
140	555.8
141	562.8
142	569.8
143	576.9
144	584.1
145	591.4
146	598.7
147	606.2
148	613.6
149	621.2
150	628.8

R-32 saturation pressure by temperature, °C and kPa
°C	kPa
-40	76
-39	84
-38	93
-37	102
-36	111
-35	120
-34	130
-33	140
-32	150
-31	161
-30	172
-29	184
-28	195
-27	208
-26	220
-25	233
-24	247
-23	260
-22	275
-21	289
-20	304
-19	320
-18	336
-17	352
-16	369
-15	387
-14	405
-13	423
-12	442
-11	461
-10	481
-9	502
-8	523
-7	544
-6	567
-5	589
-4	613
-3	636
-2	661
-1	686
0	712
1	738
2	765
3	793
4	821
5	850
6	880
7	910
8	941
9	973
10	1,006
11	1,039
12	1,073
13	1,108
14	1,143
15	1,179
16	1,217
17	1,255
18	1,293
19	1,333
20	1,373
21	1,415
22	1,457
23	1,500
24	1,544
25	1,588
26	1,634
27	1,681
28	1,728
29	1,777
30	1,826
31	1,877
32	1,928
33	1,981
34	2,034
35	2,089
36	2,144
37	2,201
38	2,258
39	2,317
40	2,377
41	2,438
42	2,500
43	2,563
44	2,628
45	2,693
46	2,760
47	2,828
48	2,898
49	2,968
50	3,040
51	3,113
52	3,187
53	3,263
54	3,340
55	3,419
56	3,498
57	3,580
58	3,662
59	3,746
60	3,832
61	3,919
62	4,008
63	4,098
64	4,190
65	4,283

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/r32-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-32 PT chart?

An R-32 PT chart lists the pressure R-32 boils and condenses at for each temperature. At 40°F that's 121.0 psig, a little higher than R-410A's 118.4. R-32 is a single-component refrigerant, so there's one pressure for each temperature, and it's sold as Forane 32, Genetron 32 and Klea 32.

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-32 is a single-component refrigerant with a lower global warming potential than R-410A, and it's one of the two main refrigerants replacing R-410A in new home systems. It's also an ingredient in both R-410A and R-454B. It's mildly flammable (safety class A2L), so check that your recovery machine and leak detector are rated for A2L refrigerants.

How it's calculated

Absolute pressure = gauge pressure + 14.696 psi (101.325 kPa, one standard atmosphere)
Saturation data: R-32: CoolProp 8.0.0, R32
Between table points (every 0.5 °C): ln(pressure) is interpolated linearly in 1 ÷ absolute temperature
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-32 pressure at 40°F?

R-32's saturation pressure at 40°F is 121.0 psig. At 100°F it's 325.7 psig.

How does R-32 compare to R-410A?

R-32 runs a little higher: 121.0 psig at 40°F against 118.4 psig for R-410A vapor, and 325.7 psig at 100°F against 317.6. R-32 is an A2L (mildly flammable) refrigerant, so it's only for equipment designed for it.

Why is there only one pressure column?

R-32 is a single compound, not a blend, so it has no glide: it boils and condenses at one temperature for a given pressure. The same saturation temperature is used for superheat and subcooling.

R-32 PT Chart