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PSI to ATM Converter

A quick two-way psi ⇄ atm converter: type in either box, choose how many decimals you want and copy the answer with one click.

PSIFrom

psi

AtmospheresTo

atm

Decimal places

Step-by-step calculation

How to use the PSI to ATM Converter

Type a value in the PSI box. The atmospheres result appears instantly.
Going the other way? Type in the Atmospheres box, or press the ⇄ swap button.
Set the precision with the decimal places menu.
Check the working in the step-by-step box, then press Copy result or click any row in the tables below.

PSI to atmospheres formula

atm = psi ÷ 14.69594878

Take the value in pounds per square inch.
Divide it by 14.69594878 (the number of pounds per square inch in one atmosphere).

Example: 14.7 psi ÷ 14.69594878 = 1.00028 atm.

Reverse formula (atmospheres to pounds per square inch): psi = atm × 14.69594878. Example: 4.08276 atm × 14.69594878 = 60 psi.

Quick mental estimate: divide by about 15. For exact answers use the converter above.

psi to atm conversion table (1–100)

Click any row to load it into the converter.

PSI to atmospheres

PSI	Atmospheres
1 psi	0.068 atm
2 psi	0.1361 atm
3 psi	0.2041 atm
4 psi	0.2722 atm
5 psi	0.3402 atm
6 psi	0.4083 atm
7 psi	0.4763 atm
8 psi	0.5444 atm
9 psi	0.6124 atm
10 psi	0.6805 atm
11 psi	0.7485 atm
12 psi	0.8166 atm
13 psi	0.8846 atm
14 psi	0.9526 atm
15 psi	1.0207 atm
16 psi	1.0887 atm
17 psi	1.1568 atm
18 psi	1.2248 atm
19 psi	1.2929 atm
20 psi	1.3609 atm
21 psi	1.429 atm
22 psi	1.497 atm
23 psi	1.5651 atm
24 psi	1.6331 atm
25 psi	1.7011 atm
26 psi	1.7692 atm
27 psi	1.8372 atm
28 psi	1.9053 atm
29 psi	1.9733 atm
30 psi	2.0414 atm
31 psi	2.1094 atm
32 psi	2.1775 atm
33 psi	2.2455 atm
34 psi	2.3136 atm
35 psi	2.3816 atm
36 psi	2.4497 atm
37 psi	2.5177 atm
38 psi	2.5857 atm
39 psi	2.6538 atm
40 psi	2.7218 atm
41 psi	2.7899 atm
42 psi	2.8579 atm
43 psi	2.926 atm
44 psi	2.994 atm
45 psi	3.0621 atm
46 psi	3.1301 atm
47 psi	3.1982 atm
48 psi	3.2662 atm
49 psi	3.3343 atm
50 psi	3.4023 atm
51 psi	3.4703 atm
52 psi	3.5384 atm
53 psi	3.6064 atm
54 psi	3.6745 atm
55 psi	3.7425 atm
56 psi	3.8106 atm
57 psi	3.8786 atm
58 psi	3.9467 atm
59 psi	4.0147 atm
60 psi	4.0828 atm
61 psi	4.1508 atm
62 psi	4.2188 atm
63 psi	4.2869 atm
64 psi	4.3549 atm
65 psi	4.423 atm
66 psi	4.491 atm
67 psi	4.5591 atm
68 psi	4.6271 atm
69 psi	4.6952 atm
70 psi	4.7632 atm
71 psi	4.8313 atm
72 psi	4.8993 atm
73 psi	4.9674 atm
74 psi	5.0354 atm
75 psi	5.1034 atm
76 psi	5.1715 atm
77 psi	5.2395 atm
78 psi	5.3076 atm
79 psi	5.3756 atm
80 psi	5.4437 atm
81 psi	5.5117 atm
82 psi	5.5798 atm
83 psi	5.6478 atm
84 psi	5.7159 atm
85 psi	5.7839 atm
86 psi	5.852 atm
87 psi	5.92 atm
88 psi	5.988 atm
89 psi	6.0561 atm
90 psi	6.1241 atm
91 psi	6.1922 atm
92 psi	6.2602 atm
93 psi	6.3283 atm
94 psi	6.3963 atm
95 psi	6.4644 atm
96 psi	6.5324 atm
97 psi	6.6005 atm
98 psi	6.6685 atm
99 psi	6.7366 atm
100 psi	6.8046 atm

Atmospheres to PSI

Atmospheres	PSI
1 atm	14.6959 psi
2 atm	29.3919 psi
3 atm	44.0878 psi
4 atm	58.7838 psi
5 atm	73.4797 psi
6 atm	88.1757 psi
7 atm	102.8716 psi
8 atm	117.5676 psi
9 atm	132.2635 psi
10 atm	146.9595 psi
11 atm	161.6554 psi
12 atm	176.3514 psi
13 atm	191.0473 psi
14 atm	205.7433 psi
15 atm	220.4392 psi
16 atm	235.1352 psi
17 atm	249.8311 psi
18 atm	264.5271 psi
19 atm	279.223 psi
20 atm	293.919 psi
21 atm	308.6149 psi
22 atm	323.3109 psi
23 atm	338.0068 psi
24 atm	352.7028 psi
25 atm	367.3987 psi
26 atm	382.0947 psi
27 atm	396.7906 psi
28 atm	411.4866 psi
29 atm	426.1825 psi
30 atm	440.8785 psi
31 atm	455.5744 psi
32 atm	470.2704 psi
33 atm	484.9663 psi
34 atm	499.6623 psi
35 atm	514.3582 psi
36 atm	529.0542 psi
37 atm	543.7501 psi
38 atm	558.4461 psi
39 atm	573.142 psi
40 atm	587.838 psi
41 atm	602.5339 psi
42 atm	617.2298 psi
43 atm	631.9258 psi
44 atm	646.6217 psi
45 atm	661.3177 psi
46 atm	676.0136 psi
47 atm	690.7096 psi
48 atm	705.4055 psi
49 atm	720.1015 psi
50 atm	734.7974 psi
51 atm	749.4934 psi
52 atm	764.1893 psi
53 atm	778.8853 psi
54 atm	793.5812 psi
55 atm	808.2772 psi
56 atm	822.9731 psi
57 atm	837.6691 psi
58 atm	852.365 psi
59 atm	867.061 psi
60 atm	881.7569 psi
61 atm	896.4529 psi
62 atm	911.1488 psi
63 atm	925.8448 psi
64 atm	940.5407 psi
65 atm	955.2367 psi
66 atm	969.9326 psi
67 atm	984.6286 psi
68 atm	999.3245 psi
69 atm	1,014.0205 psi
70 atm	1,028.7164 psi
71 atm	1,043.4124 psi
72 atm	1,058.1083 psi
73 atm	1,072.8043 psi
74 atm	1,087.5002 psi
75 atm	1,102.1962 psi
76 atm	1,116.8921 psi
77 atm	1,131.5881 psi
78 atm	1,146.284 psi
79 atm	1,160.98 psi
80 atm	1,175.6759 psi
81 atm	1,190.3719 psi
82 atm	1,205.0678 psi
83 atm	1,219.7637 psi
84 atm	1,234.4597 psi
85 atm	1,249.1556 psi
86 atm	1,263.8516 psi
87 atm	1,278.5475 psi
88 atm	1,293.2435 psi
89 atm	1,307.9394 psi
90 atm	1,322.6354 psi
91 atm	1,337.3313 psi
92 atm	1,352.0273 psi
93 atm	1,366.7232 psi
94 atm	1,381.4192 psi
95 atm	1,396.1151 psi
96 atm	1,410.8111 psi
97 atm	1,425.507 psi
98 atm	1,440.203 psi
99 atm	1,454.8989 psi
100 atm	1,469.5949 psi

Common values

PSI	Atmospheres	Example
1 psi	0.07 atm	1 psi
14.7 psi	1 atm	Atmospheric pressure
20 psi	1.36 atm	20 psi
30 psi	2.04 atm	Car tyre (approx.)
32 psi	2.18 atm	32 psi
35 psi	2.38 atm	35 psi
40 psi	2.72 atm	Bike tyre (hybrid)
60 psi	4.08 atm	60 psi
80 psi	5.44 atm	Road bike tyre
100 psi	6.8 atm	100 psi
120 psi	8.17 atm	Air compressor
3,000 psi	204.14 atm	Scuba tank (approx.)

About PSI and atmospheres

PSI (psi). Pounds per square inch (psi) is a US customary pressure unit, used for tyre pressure, air compressors and plumbing. One psi is about 6,894.76 pascals.

Atmospheres (atm). The standard atmosphere is defined as exactly 101,325 pascals: average air pressure at sea level. It equals 14.696 psi, 1.01325 bar or 760 mmHg.

Frequently asked questions

1 pound per square inch equals how many atmospheres?

One pound per square inch equals 0.068046 atmospheres. Looking at it the other way, one atmosphere is 14.6959 pounds per square inch.

How do you convert pounds per square inch to atmospheres?

Divide the number of pounds per square inch by 14.69594878. For example, 14.7 psi ÷ 14.69594878 = 1.00028 atm.

What is 60 pounds per square inch in atmospheres?

60 psi is 4.08276 atm.

How do I convert atmospheres back to pounds per square inch?

Multiply by 14.69594878, or press the ⇄ swap button above. For example, 4.08276 atm × 14.69594878 = 60 psi.

How many mmHg are in one atmosphere?

Exactly 760 mmHg, which equals 101.325 kPa or 14.696 psi. This is also the definition of the torr: 1 atm = 760 torr.

What is the difference between psi and psig?

psig is gauge pressure (above the surrounding air), which is what tyre gauges show; psia is absolute pressure. Atmospheric pressure at sea level is about 14.7 psi, 1.013 bar or 101.3 kPa.

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