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ATM to PSI Converter

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

AtmospheresFrom

atm

PSITo

psi

Decimal places

Step-by-step calculation

How to use the ATM to PSI Converter

Type a value in the Atmospheres box. The PSI result appears instantly.
Going the other way? Type in the PSI 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.

Atmospheres to PSI formula

psi = atm × 14.69594878

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

Example: 1 atm × 14.69594878 = 14.6959 psi.

Reverse formula (pounds per square inch to atmospheres): atm = psi ÷ 14.69594878. Example: 44.0878 psi ÷ 14.69594878 = 3 atm.

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

atm to psi conversion table (1–100)

Click any row to load it into the converter.

Atmospheres to PSI

Atmospheres	PSI
1 atm	14.7 psi
2 atm	29.39 psi
3 atm	44.09 psi
4 atm	58.78 psi
5 atm	73.48 psi
6 atm	88.18 psi
7 atm	102.87 psi
8 atm	117.57 psi
9 atm	132.26 psi
10 atm	146.96 psi
11 atm	161.66 psi
12 atm	176.35 psi
13 atm	191.05 psi
14 atm	205.74 psi
15 atm	220.44 psi
16 atm	235.14 psi
17 atm	249.83 psi
18 atm	264.53 psi
19 atm	279.22 psi
20 atm	293.92 psi
21 atm	308.61 psi
22 atm	323.31 psi
23 atm	338.01 psi
24 atm	352.7 psi
25 atm	367.4 psi
26 atm	382.09 psi
27 atm	396.79 psi
28 atm	411.49 psi
29 atm	426.18 psi
30 atm	440.88 psi
31 atm	455.57 psi
32 atm	470.27 psi
33 atm	484.97 psi
34 atm	499.66 psi
35 atm	514.36 psi
36 atm	529.05 psi
37 atm	543.75 psi
38 atm	558.45 psi
39 atm	573.14 psi
40 atm	587.84 psi
41 atm	602.53 psi
42 atm	617.23 psi
43 atm	631.93 psi
44 atm	646.62 psi
45 atm	661.32 psi
46 atm	676.01 psi
47 atm	690.71 psi
48 atm	705.41 psi
49 atm	720.1 psi
50 atm	734.8 psi
51 atm	749.49 psi
52 atm	764.19 psi
53 atm	778.89 psi
54 atm	793.58 psi
55 atm	808.28 psi
56 atm	822.97 psi
57 atm	837.67 psi
58 atm	852.37 psi
59 atm	867.06 psi
60 atm	881.76 psi
61 atm	896.45 psi
62 atm	911.15 psi
63 atm	925.84 psi
64 atm	940.54 psi
65 atm	955.24 psi
66 atm	969.93 psi
67 atm	984.63 psi
68 atm	999.32 psi
69 atm	1,014.02 psi
70 atm	1,028.72 psi
71 atm	1,043.41 psi
72 atm	1,058.11 psi
73 atm	1,072.8 psi
74 atm	1,087.5 psi
75 atm	1,102.2 psi
76 atm	1,116.89 psi
77 atm	1,131.59 psi
78 atm	1,146.28 psi
79 atm	1,160.98 psi
80 atm	1,175.68 psi
81 atm	1,190.37 psi
82 atm	1,205.07 psi
83 atm	1,219.76 psi
84 atm	1,234.46 psi
85 atm	1,249.16 psi
86 atm	1,263.85 psi
87 atm	1,278.55 psi
88 atm	1,293.24 psi
89 atm	1,307.94 psi
90 atm	1,322.64 psi
91 atm	1,337.33 psi
92 atm	1,352.03 psi
93 atm	1,366.72 psi
94 atm	1,381.42 psi
95 atm	1,396.12 psi
96 atm	1,410.81 psi
97 atm	1,425.51 psi
98 atm	1,440.2 psi
99 atm	1,454.9 psi
100 atm	1,469.59 psi

PSI to atmospheres

PSI	Atmospheres
1 psi	0.07 atm
2 psi	0.14 atm
3 psi	0.2 atm
4 psi	0.27 atm
5 psi	0.34 atm
6 psi	0.41 atm
7 psi	0.48 atm
8 psi	0.54 atm
9 psi	0.61 atm
10 psi	0.68 atm
11 psi	0.75 atm
12 psi	0.82 atm
13 psi	0.88 atm
14 psi	0.95 atm
15 psi	1.02 atm
16 psi	1.09 atm
17 psi	1.16 atm
18 psi	1.22 atm
19 psi	1.29 atm
20 psi	1.36 atm
21 psi	1.43 atm
22 psi	1.5 atm
23 psi	1.57 atm
24 psi	1.63 atm
25 psi	1.7 atm
26 psi	1.77 atm
27 psi	1.84 atm
28 psi	1.91 atm
29 psi	1.97 atm
30 psi	2.04 atm
31 psi	2.11 atm
32 psi	2.18 atm
33 psi	2.25 atm
34 psi	2.31 atm
35 psi	2.38 atm
36 psi	2.45 atm
37 psi	2.52 atm
38 psi	2.59 atm
39 psi	2.65 atm
40 psi	2.72 atm
41 psi	2.79 atm
42 psi	2.86 atm
43 psi	2.93 atm
44 psi	2.99 atm
45 psi	3.06 atm
46 psi	3.13 atm
47 psi	3.2 atm
48 psi	3.27 atm
49 psi	3.33 atm
50 psi	3.4 atm
51 psi	3.47 atm
52 psi	3.54 atm
53 psi	3.61 atm
54 psi	3.67 atm
55 psi	3.74 atm
56 psi	3.81 atm
57 psi	3.88 atm
58 psi	3.95 atm
59 psi	4.01 atm
60 psi	4.08 atm
61 psi	4.15 atm
62 psi	4.22 atm
63 psi	4.29 atm
64 psi	4.35 atm
65 psi	4.42 atm
66 psi	4.49 atm
67 psi	4.56 atm
68 psi	4.63 atm
69 psi	4.7 atm
70 psi	4.76 atm
71 psi	4.83 atm
72 psi	4.9 atm
73 psi	4.97 atm
74 psi	5.04 atm
75 psi	5.1 atm
76 psi	5.17 atm
77 psi	5.24 atm
78 psi	5.31 atm
79 psi	5.38 atm
80 psi	5.44 atm
81 psi	5.51 atm
82 psi	5.58 atm
83 psi	5.65 atm
84 psi	5.72 atm
85 psi	5.78 atm
86 psi	5.85 atm
87 psi	5.92 atm
88 psi	5.99 atm
89 psi	6.06 atm
90 psi	6.12 atm
91 psi	6.19 atm
92 psi	6.26 atm
93 psi	6.33 atm
94 psi	6.4 atm
95 psi	6.46 atm
96 psi	6.53 atm
97 psi	6.6 atm
98 psi	6.67 atm
99 psi	6.74 atm
100 psi	6.8 atm

Common values

Atmospheres	PSI	Example
0.33 atm	4.85 psi	Summit of Everest (approx.)
0.5 atm	7.35 psi	Half an atmosphere
1 atm	14.7 psi	Sea level
2 atm	29.39 psi	2 atm (10 m underwater)
3 atm	44.09 psi	3 atm
5 atm	73.48 psi	5 atm
10 atm	146.96 psi	10 atm
100 atm	1,469.59 psi	100 atm

About atmospheres and PSI

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.

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.

Frequently asked questions

1 atmosphere equals how many pounds per square inch?

One atmosphere equals 14.6959 pounds per square inch.

How do you convert atmospheres to pounds per square inch?

Multiply the number of atmospheres by 14.69594878. For example, 1 atm × 14.69594878 = 14.6959 psi.

What is 3 atmospheres in pounds per square inch?

3 atm is 44.0878 psi.

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

Divide by 14.69594878, or press the ⇄ swap button above. For example, 44.0878 psi ÷ 14.69594878 = 3 atm.

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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