R-1234yf PT Chart

R-1234yf saturation pressure, −40 to 150 °F−40 to 65 °C. Used in automotive A/C.

How to use ↓

Safety class A2LSingle component (HFO)No glideNo glide

PT lookup

Step 1 Refrigerant

Step 2 I know the

Temperature Pressure

Step 3 Temperature

°F°C

Type a temperature to see the saturation pressure.

R-1234yf pressure temperature table

Below 0 psig: inches of mercury vacuum. Highlighted: 40 °F and 100 °F.Negative kPa = vacuum. Highlighted: 4 °C and 38 °C.

R-1234yf saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Pressure psig
-40	11.6 inHg
-39	11.1 inHg
-38	10.5 inHg
-37	10.0 inHg
-36	9.5 inHg
-35	8.9 inHg
-34	8.4 inHg
-33	7.8 inHg
-32	7.2 inHg
-31	6.6 inHg
-30	6.0 inHg
-29	5.4 inHg
-28	4.8 inHg
-27	4.1 inHg
-26	3.5 inHg
-25	2.8 inHg
-24	2.1 inHg
-23	1.4 inHg
-22	0.7 inHg
-21	0.0
-20	0.4
-19	0.7
-18	1.1
-17	1.5
-16	1.9
-15	2.3
-14	2.7
-13	3.1
-12	3.5
-11	4.0
-10	4.4
-9	4.8
-8	5.3
-7	5.8
-6	6.2
-5	6.7
-4	7.2
-3	7.7
-2	8.2
-1	8.7
0	9.2
1	9.7
2	10.3
3	10.8
4	11.4
5	11.9
6	12.5
7	13.1
8	13.7
9	14.3
10	14.9
11	15.5
12	16.2
13	16.8
14	17.5
15	18.1
16	18.8
17	19.5
18	20.2
19	20.9
20	21.6
21	22.3
22	23.1
23	23.8
24	24.6
25	25.4
26	26.2
27	27.0
28	27.8
29	28.6
30	29.4
31	30.3
32	31.1
33	32.0
34	32.9
35	33.8
36	34.7
37	35.6
38	36.5
39	37.5
40	38.4
41	39.4
42	40.4
43	41.4
44	42.4
45	43.4
46	44.5
47	45.5
48	46.6
49	47.7
50	48.8
51	49.9
52	51.0
53	52.2
54	53.3
55	54.5
56	55.7
57	56.9
58	58.1
59	59.3
60	60.6
61	61.8
62	63.1
63	64.4
64	65.7
65	67.1
66	68.4
67	69.8
68	71.1
69	72.5
70	74.0
71	75.4
72	76.8
73	78.3
74	79.8
75	81.3
76	82.8
77	84.3
78	85.9
79	87.4
80	89.0
81	90.6
82	92.3
83	93.9
84	95.6
85	97.3
86	99.0
87	100.7
88	102.4
89	104.2
90	106.0
91	107.8
92	109.6
93	111.4
94	113.3
95	115.2
96	117.1
97	119.0
98	120.9
99	122.9
100	124.9
101	126.9
102	128.9
103	131.0
104	133.0
105	135.1
106	137.2
107	139.4
108	141.5
109	143.7
110	145.9
111	148.1
112	150.4
113	152.7
114	155.0
115	157.3
116	159.6
117	162.0
118	164.4
119	166.8
120	169.2
121	171.7
122	174.2
123	176.7
124	179.2
125	181.8
126	184.4
127	187.0
128	189.7
129	192.3
130	195.0
131	197.7
132	200.5
133	203.3
134	206.1
135	208.9
136	211.7
137	214.6
138	217.5
139	220.5
140	223.4
141	226.4
142	229.4
143	232.5
144	235.6
145	238.7
146	241.8
147	245.0
148	248.2
149	251.4
150	254.7

R-1234yf saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Pressure kPa
-40	-39.1
-39	-36.0
-38	-32.8
-37	-29.5
-36	-26.0
-35	-22.4
-34	-18.7
-33	-14.8
-32	-10.8
-31	-6.7
-30	-2.4
-29	2.1
-28	6.7
-27	11.4
-26	16.3
-25	21.4
-24	26.7
-23	32.1
-22	37.8
-21	43.6
-20	49.5
-19	55.7
-18	62.1
-17	68.6
-16	75.4
-15	82.4
-14	89.6
-13	96.9
-12	104.6
-11	112.4
-10	120.5
-9	128.8
-8	137.3
-7	146.1
-6	155.1
-5	164.3
-4	173.9
-3	183.6
-2	193.7
-1	204.0
0	214.6
1	225.4
2	236.5
3	248.0
4	259.7
5	271.7
6	284.0
7	296.6
8	309.5
9	322.8
10	336.3
11	350.2
12	364.4
13	378.9
14	393.8
15	409.0
16	424.6
17	440.5
18	456.8
19	473.5
20	490.5
21	507.9
22	525.7
23	543.9
24	562.4
25	581.4
26	600.7
27	620.5
28	640.7
29	661.3
30	682.3
31	703.7
32	725.6
33	748.0
34	770.7
35	794.0
36	817.7
37	841.8
38	866.5
39	891.6
40	917.1
41	943.2
42	969.8
43	996.9
44	1024.5
45	1052.6
46	1081.2
47	1110.3
48	1140.0
49	1170.2
50	1201.0
51	1232.4
52	1264.2
53	1296.7
54	1329.7
55	1363.4
56	1397.6
57	1432.4
58	1467.8
59	1503.9
60	1540.5
61	1577.8
62	1615.7
63	1654.3
64	1693.5
65	1733.4

Back to the lookup ↑

R-1234yf PT Chart

°F / psig · Safety class A2L · Single component (HFO)

refrigerantptchart.com

°F	psig
-40	11.6"
-39	11.1"
-38	10.5"
-37	10.0"
-36	9.5"
-35	8.9"
-34	8.4"
-33	7.8"
-32	7.2"
-31	6.6"
-30	6.0"
-29	5.4"
-28	4.8"
-27	4.1"
-26	3.5"
-25	2.8"
-24	2.1"
-23	1.4"
-22	0.7"
-21	0.0
-20	0.4
-19	0.7
-18	1.1
-17	1.5
-16	1.9
-15	2.3
-14	2.7
-13	3.1
-12	3.5
-11	4.0
-10	4.4
-9	4.8
-8	5.3
-7	5.8
-6	6.2
-5	6.7
-4	7.2
-3	7.7
-2	8.2
-1	8.7
0	9.2
1	9.7
2	10.3
3	10.8
4	11.4
5	11.9
6	12.5
7	13.1

°F	psig
8	13.7
9	14.3
10	14.9
11	15.5
12	16.2
13	16.8
14	17.5
15	18.1
16	18.8
17	19.5
18	20.2
19	20.9
20	21.6
21	22.3
22	23.1
23	23.8
24	24.6
25	25.4
26	26.2
27	27.0
28	27.8
29	28.6
30	29.4
31	30.3
32	31.1
33	32.0
34	32.9
35	33.8
36	34.7
37	35.6
38	36.5
39	37.5
40	38.4
41	39.4
42	40.4
43	41.4
44	42.4
45	43.4
46	44.5
47	45.5
48	46.6
49	47.7
50	48.8
51	49.9
52	51.0
53	52.2
54	53.3
55	54.5

°F	psig
56	55.7
57	56.9
58	58.1
59	59.3
60	60.6
61	61.8
62	63.1
63	64.4
64	65.7
65	67.1
66	68.4
67	69.8
68	71.1
69	72.5
70	74.0
71	75.4
72	76.8
73	78.3
74	79.8
75	81.3
76	82.8
77	84.3
78	85.9
79	87.4
80	89.0
81	90.6
82	92.3
83	93.9
84	95.6
85	97.3
86	99.0
87	100.7
88	102.4
89	104.2
90	106.0
91	107.8
92	109.6
93	111.4
94	113.3
95	115.2
96	117.1
97	119.0
98	120.9
99	122.9
100	124.9
101	126.9
102	128.9
103	131.0

°F	psig
104	133.0
105	135.1
106	137.2
107	139.4
108	141.5
109	143.7
110	145.9
111	148.1
112	150.4
113	152.7
114	155.0
115	157.3
116	159.6
117	162.0
118	164.4
119	166.8
120	169.2
121	171.7
122	174.2
123	176.7
124	179.2
125	181.8
126	184.4
127	187.0
128	189.7
129	192.3
130	195.0
131	197.7
132	200.5
133	203.3
134	206.1
135	208.9
136	211.7
137	214.6
138	217.5
139	220.5
140	223.4
141	226.4
142	229.4
143	232.5
144	235.6
145	238.7
146	241.8
147	245.0
148	248.2
149	251.4
150	254.7

Italic " = inches of mercury vacuum. Bold rows: 40 °F and 100 °F. Reference only: always verify with the manufacturer’s data and your gauges.

R-1234yf PT Chart

°C / kPa (gauge) · Safety class A2L · Single component (HFO)

refrigerantptchart.com

°C	kPa
-40	-39.1
-39	-36.0
-38	-32.8
-37	-29.5
-36	-26.0
-35	-22.4
-34	-18.7
-33	-14.8
-32	-10.8
-31	-6.7
-30	-2.4
-29	2.1
-28	6.7
-27	11.4
-26	16.3
-25	21.4
-24	26.7
-23	32.1
-22	37.8
-21	43.6
-20	49.5
-19	55.7
-18	62.1
-17	68.6
-16	75.4
-15	82.4
-14	89.6
-13	96.9
-12	104.6
-11	112.4
-10	120.5
-9	128.8
-8	137.3
-7	146.1
-6	155.1
-5	164.3

°C	kPa
-4	173.9
-3	183.6
-2	193.7
-1	204.0
0	214.6
1	225.4
2	236.5
3	248.0
4	259.7
5	271.7
6	284.0
7	296.6
8	309.5
9	322.8
10	336.3
11	350.2
12	364.4
13	378.9
14	393.8
15	409.0
16	424.6
17	440.5
18	456.8
19	473.5
20	490.5
21	507.9
22	525.7
23	543.9
24	562.4
25	581.4
26	600.7
27	620.5
28	640.7
29	661.3
30	682.3
31	703.7

°C	kPa
32	725.6
33	748.0
34	770.7
35	794.0
36	817.7
37	841.8
38	866.5
39	891.6
40	917.1
41	943.2
42	969.8
43	996.9
44	1024.5
45	1052.6
46	1081.2
47	1110.3
48	1140.0
49	1170.2
50	1201.0
51	1232.4
52	1264.2
53	1296.7
54	1329.7
55	1363.4
56	1397.6
57	1432.4
58	1467.8
59	1503.9
60	1540.5
61	1577.8
62	1615.7
63	1654.3
64	1693.5
65	1733.4

Negative kPa = vacuum. Bold rows: 4 °C and 38 °C. Reference only: always verify with the manufacturer’s data and your gauges.

How to use

Choose Temperature or Pressure and type the number. The answer shows straight away.
Blends show two values: use vapor (dew) for superheat and liquid (bubble) for subcooling.
Tap °C · kPa for metric. Below 0 psig, pressure is in inches of mercury (inHg) vacuum.
Press Print pocket chart for a one-page chart (Letter or A4) for the van or the tool bag.

About this R-1234yf chart

This R-1234yf pressure temperature chart gives the saturation pressure for every degree, in psig with °F or kPa (gauge) with °C. Below 0 psig the °F table shows inches of mercury (inHg) vacuum.

Source: manufacturer and supplier charts (Chemours, A-Gas). Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-1234yf pressure at 40 °F?

38.4 psig at saturation, from the table above.

What is the R-1234yf pressure at 100 °F?

124.9 psig at saturation.

Does R-1234yf have glide?

No. R-1234yf is a single-component refrigerant, so one saturation pressure works for both superheat and subcooling.

R-1234yf PT Chart

PT lookup

R-1234yf pressure temperature table

How to use

About this R-1234yf chart

FAQ

Related