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MPa to PSI Converter

Convert megapascals to pounds per square inch in one step. Results update live in both directions, with a worked formula, nearby units and a 1–100 chart you can click.

Last updated: October 24, 2026

MegapascalsFrom

MPa

PSITo

psi

Decimal places

Step-by-step calculation

How to use the MPa to PSI Converter

Type a value in the Megapascals 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.

Megapascals to PSI formula

psi = MPa × 145.0377377

Take the value in megapascals.
Multiply it by 145.0377377 (the number of pounds per square inch in one megapascal).

Example: 30 MPa × 145.0377377 = 4,351.13 psi.

Reverse formula (pounds per square inch to megapascals): MPa = psi ÷ 145.0377377. Example: 5,801.51 psi ÷ 145.0377377 = 40 MPa.

Quick mental estimate: multiply by about 150. For exact answers use the converter above.

MPa to psi conversion table (1–100)

Click any row to load it into the converter.

Megapascals to PSI

Megapascals	PSI
1 MPa	145.04 psi
2 MPa	290.08 psi
3 MPa	435.11 psi
4 MPa	580.15 psi
5 MPa	725.19 psi
6 MPa	870.23 psi
7 MPa	1,015.26 psi
8 MPa	1,160.3 psi
9 MPa	1,305.34 psi
10 MPa	1,450.38 psi
11 MPa	1,595.42 psi
12 MPa	1,740.45 psi
13 MPa	1,885.49 psi
14 MPa	2,030.53 psi
15 MPa	2,175.57 psi
16 MPa	2,320.6 psi
17 MPa	2,465.64 psi
18 MPa	2,610.68 psi
19 MPa	2,755.72 psi
20 MPa	2,900.75 psi
21 MPa	3,045.79 psi
22 MPa	3,190.83 psi
23 MPa	3,335.87 psi
24 MPa	3,480.91 psi
25 MPa	3,625.94 psi
26 MPa	3,770.98 psi
27 MPa	3,916.02 psi
28 MPa	4,061.06 psi
29 MPa	4,206.09 psi
30 MPa	4,351.13 psi
31 MPa	4,496.17 psi
32 MPa	4,641.21 psi
33 MPa	4,786.25 psi
34 MPa	4,931.28 psi
35 MPa	5,076.32 psi
36 MPa	5,221.36 psi
37 MPa	5,366.4 psi
38 MPa	5,511.43 psi
39 MPa	5,656.47 psi
40 MPa	5,801.51 psi
41 MPa	5,946.55 psi
42 MPa	6,091.58 psi
43 MPa	6,236.62 psi
44 MPa	6,381.66 psi
45 MPa	6,526.7 psi
46 MPa	6,671.74 psi
47 MPa	6,816.77 psi
48 MPa	6,961.81 psi
49 MPa	7,106.85 psi
50 MPa	7,251.89 psi
51 MPa	7,396.92 psi
52 MPa	7,541.96 psi
53 MPa	7,687 psi
54 MPa	7,832.04 psi
55 MPa	7,977.08 psi
56 MPa	8,122.11 psi
57 MPa	8,267.15 psi
58 MPa	8,412.19 psi
59 MPa	8,557.23 psi
60 MPa	8,702.26 psi
61 MPa	8,847.3 psi
62 MPa	8,992.34 psi
63 MPa	9,137.38 psi
64 MPa	9,282.42 psi
65 MPa	9,427.45 psi
66 MPa	9,572.49 psi
67 MPa	9,717.53 psi
68 MPa	9,862.57 psi
69 MPa	10,007.6 psi
70 MPa	10,152.64 psi
71 MPa	10,297.68 psi
72 MPa	10,442.72 psi
73 MPa	10,587.75 psi
74 MPa	10,732.79 psi
75 MPa	10,877.83 psi
76 MPa	11,022.87 psi
77 MPa	11,167.91 psi
78 MPa	11,312.94 psi
79 MPa	11,457.98 psi
80 MPa	11,603.02 psi
81 MPa	11,748.06 psi
82 MPa	11,893.09 psi
83 MPa	12,038.13 psi
84 MPa	12,183.17 psi
85 MPa	12,328.21 psi
86 MPa	12,473.25 psi
87 MPa	12,618.28 psi
88 MPa	12,763.32 psi
89 MPa	12,908.36 psi
90 MPa	13,053.4 psi
91 MPa	13,198.43 psi
92 MPa	13,343.47 psi
93 MPa	13,488.51 psi
94 MPa	13,633.55 psi
95 MPa	13,778.59 psi
96 MPa	13,923.62 psi
97 MPa	14,068.66 psi
98 MPa	14,213.7 psi
99 MPa	14,358.74 psi
100 MPa	14,503.77 psi

PSI to megapascals

PSI	Megapascals
1 psi	0.01 MPa
2 psi	0.01 MPa
3 psi	0.02 MPa
4 psi	0.03 MPa
5 psi	0.03 MPa
6 psi	0.04 MPa
7 psi	0.05 MPa
8 psi	0.06 MPa
9 psi	0.06 MPa
10 psi	0.07 MPa
11 psi	0.08 MPa
12 psi	0.08 MPa
13 psi	0.09 MPa
14 psi	0.1 MPa
15 psi	0.1 MPa
16 psi	0.11 MPa
17 psi	0.12 MPa
18 psi	0.12 MPa
19 psi	0.13 MPa
20 psi	0.14 MPa
21 psi	0.14 MPa
22 psi	0.15 MPa
23 psi	0.16 MPa
24 psi	0.17 MPa
25 psi	0.17 MPa
26 psi	0.18 MPa
27 psi	0.19 MPa
28 psi	0.19 MPa
29 psi	0.2 MPa
30 psi	0.21 MPa
31 psi	0.21 MPa
32 psi	0.22 MPa
33 psi	0.23 MPa
34 psi	0.23 MPa
35 psi	0.24 MPa
36 psi	0.25 MPa
37 psi	0.26 MPa
38 psi	0.26 MPa
39 psi	0.27 MPa
40 psi	0.28 MPa
41 psi	0.28 MPa
42 psi	0.29 MPa
43 psi	0.3 MPa
44 psi	0.3 MPa
45 psi	0.31 MPa
46 psi	0.32 MPa
47 psi	0.32 MPa
48 psi	0.33 MPa
49 psi	0.34 MPa
50 psi	0.34 MPa
51 psi	0.35 MPa
52 psi	0.36 MPa
53 psi	0.37 MPa
54 psi	0.37 MPa
55 psi	0.38 MPa
56 psi	0.39 MPa
57 psi	0.39 MPa
58 psi	0.4 MPa
59 psi	0.41 MPa
60 psi	0.41 MPa
61 psi	0.42 MPa
62 psi	0.43 MPa
63 psi	0.43 MPa
64 psi	0.44 MPa
65 psi	0.45 MPa
66 psi	0.46 MPa
67 psi	0.46 MPa
68 psi	0.47 MPa
69 psi	0.48 MPa
70 psi	0.48 MPa
71 psi	0.49 MPa
72 psi	0.5 MPa
73 psi	0.5 MPa
74 psi	0.51 MPa
75 psi	0.52 MPa
76 psi	0.52 MPa
77 psi	0.53 MPa
78 psi	0.54 MPa
79 psi	0.54 MPa
80 psi	0.55 MPa
81 psi	0.56 MPa
82 psi	0.57 MPa
83 psi	0.57 MPa
84 psi	0.58 MPa
85 psi	0.59 MPa
86 psi	0.59 MPa
87 psi	0.6 MPa
88 psi	0.61 MPa
89 psi	0.61 MPa
90 psi	0.62 MPa
91 psi	0.63 MPa
92 psi	0.63 MPa
93 psi	0.64 MPa
94 psi	0.65 MPa
95 psi	0.66 MPa
96 psi	0.66 MPa
97 psi	0.67 MPa
98 psi	0.68 MPa
99 psi	0.68 MPa
100 psi	0.69 MPa

Common values

Megapascals	PSI	Example
0.1 MPa	14.5 psi	About 1 atmosphere
1 MPa	145.04 psi	1 MPa
10 MPa	1,450.38 psi	10 MPa
20 MPa	2,900.75 psi	C20 concrete
30 MPa	4,351.13 psi	C30 concrete
40 MPa	5,801.51 psi	C40 concrete
70 MPa	10,152.64 psi	Water jet / hydraulics
250 MPa	36,259.43 psi	Mild steel yield
400 MPa	58,015.1 psi	Structural steel tensile

About megapascals and PSI

Megapascals (MPa). The megapascal (MPa) is one million pascals, about 145 psi. Material strengths (concrete 25–40 MPa, steel 250+ MPa) and hydraulic pressures use MPa.

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

What is 1 megapascal in pounds per square inch?

One megapascal equals 145.038 pounds per square inch.

How do you convert megapascals to pounds per square inch?

Multiply the number of megapascals by 145.0377377. For example, 30 MPa × 145.0377377 = 4,351.13 psi.

What is 40 megapascals in pounds per square inch?

40 MPa is 5,801.51 psi (c40 concrete).

How much is 250 megapascals in pounds per square inch?

250 megapascals equals 36,259.4 pounds per square inch.

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

Divide by 145.0377377, or press the ⇄ swap button above. For example, 5,801.51 psi ÷ 145.0377377 = 40 MPa.

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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