Convert MPa to Psi

Q: How many psi is 1 MPa?

145.038 psi. For quick estimates, use 1 MPa ≈ 145 psi.

Q: What is 30 MPa in psi?

30 MPa = 4,351 psi. This is typical compressive strength for standard structural concrete (C30 grade).

Q: What is the relationship between MPa, kPa, and bar?

1 MPa = 1,000 kPa = 10 bar. All three are metric and based on the pascal. MPa is used for high pressures, kPa for moderate pressures, bar for everyday industry.

1 MPa equals 145.038 psi.

Formula: psi = MPa × 145.038

MPa to Psi Converter

What Is a Megapascal?

The megapascal (MPa) is an SI-derived unit of pressure equal to 1,000,000 pascals (1,000 kPa or 10 bar). It is the standard unit in engineering for material properties — tensile strength, yield strength, and compressive strength are all reported in MPa. It is also used for hydraulic system pressures and concrete specifications.

What Is PSI?

PSI (lbf/in²) stands for pound-force per square inch. It is the primary pressure unit in the United States, used for tire pressure, hydraulic systems, water pressure, and compressed gas. One psi equals approximately 6,894.76 pascals.

MPa to PSI Formula

The conversion factor is:

psi = MPa × 145.038

Derived from: 1 psi = 6,894.757 Pa, so 1 MPa = 1,000,000 ÷ 6,894.757 ≈ 145.038 psi.

Worked Example

Convert 250 MPa (typical yield strength of structural steel) to psi:

Multiply: 250 × 145.038 = 36,260 psi

So 250 MPa ≈ 36,260 psi — a common specification for A36 structural steel.

Quick Estimation

1 MPa ≈ 145 psi. Multiply by 145 — or multiply by 150 and subtract 3%. Example: 10 MPa × 150 = 1,500 - 3% ≈ 1,450 psi (exact: 1,450.4).

Common MPa to PSI Conversions

MPa	PSI	Context
0.1 MPa	14.5 psi	≈ 1 atmosphere
0.7 MPa	101.5 psi	Industrial compressed air
1 MPa	145 psi	Water main pressure (high)
2 MPa	290 psi	Fire hose operating pressure
10 MPa	1,450 psi	Hydraulic jack / car lift
20 MPa	2,901 psi	Standard hydraulic system
30 MPa	4,351 psi	Concrete compressive strength (typical)
100 MPa	14,504 psi	High-performance concrete
250 MPa	36,260 psi	A36 structural steel yield strength
500 MPa	72,519 psi	High-strength steel / titanium alloy

Which Is Bigger: MPa or PSI?

A megapascal is about 145 times larger than a psi. One MPa = 145 psi. MPa is a large unit designed for engineering applications; psi is a smaller unit used for everyday pressures. Material strength values in MPa are compact numbers (250 MPa vs. 36,260 psi).

When You Need This Conversion

Material specifications: International standards (ISO, EN) specify material strength in MPa. US standards (ASTM, SAE) use psi. A36 steel: 250 MPa = 36,260 psi yield strength.
Hydraulics: European hydraulic equipment is rated in MPa (or bar); US systems use psi. A 20 MPa hydraulic pump = 2,901 psi.
Concrete testing: Concrete compressive strength is specified as 20-50 MPa internationally, or 2,900-7,250 psi in US construction.

Frequently Asked Questions

How many psi is 1 MPa?

145.038 psi. For quick estimates, use 1 MPa ≈ 145 psi.

How do I convert MPa to psi?

Multiply by 145.038. Example: 50 MPa × 145 = 7,252 psi.

What is 30 MPa in psi?

30 MPa = 4,351 psi. This is typical compressive strength for standard structural concrete (C30 grade).

How do I convert psi to MPa?

Divide by 145.038 — or multiply by 0.006895. Example: 5,000 psi ÷ 145 ≈ 34.5 MPa.

What is the relationship between MPa, kPa, and bar?

1 MPa = 1,000 kPa = 10 bar. All three are metric and based on the pascal. MPa is used for high pressures, kPa for moderate pressures, bar for everyday industry.

Common MPa to Psi Conversions

MPa to Psi (Part 1)

MPa	Psi	Actions
0.1 MPa	14.5038 psi
12 MPa	72.5189 psi
1 MPa	145.038 psi

MPa to Psi (Part 2)

MPa	Psi	Actions
2 MPa	290.075 psi
5 MPa	725.189 psi
10 MPa	1450.38 psi

MPa to psi Conversion Table

Reference table with common mpa to psi conversions. All values calculated with high precision.

MPa to Psi Table
0.0001 to 12

MPa	Psi	Actions
0.0001 MPa	0.0145038 psi
0.00025 MPa	0.0362594 psi
0.0005 MPa	0.0725189 psi
0.001 MPa	0.145038 psi
0.0025 MPa	0.362594 psi
0.005 MPa	0.725189 psi
0.01 MPa	1.45038 psi
0.025 MPa	3.62594 psi
0.05 MPa	7.25189 psi
0.1 MPa	14.5038 psi
14 MPa	36.2594 psi
12 MPa	72.5189 psi

MPa to Psi Table
1 to 100000

MPa	Psi	Actions
1 MPa	145.038 psi
2 12 MPa	362.594 psi
5 MPa	725.189 psi
10 MPa	1450.38 psi
25 MPa	3625.94 psi
50 MPa	7251.89 psi
100 MPa	14503.8 psi
250 MPa	36259.4 psi
500 MPa	72518.9 psi
1000 MPa	145038 psi
2500 MPa	362594 psi
5000 MPa	725189 psi
10000 MPa	1450380 psi
25000 MPa	3625940 psi
50000 MPa	7251890 psi
100000 MPa	1.45038 × 10⁷ psi

Psi to MPa Table
0.1 to 500

Psi	MPa	Actions
0.1 psi	0.000689476 MPa
14 psi	0.00172369 MPa
12 psi	0.00344738 MPa
1 psi	0.00689476 MPa
2 12 psi	0.0172369 MPa
5 psi	0.0344738 MPa
10 psi	0.0689476 MPa
25 psi	0.172369 MPa
50 psi	0.344738 MPa
100 psi	0.689476 MPa
250 psi	1.72369 MPa
500 psi	3.44738 MPa

Psi to MPa Table
1000 to 1 × 10⁸

Psi	MPa	Actions
1000 psi	6.89476 MPa
2500 psi	17.2369 MPa
5000 psi	34.4738 MPa
10000 psi	68.9476 MPa
25000 psi	172.369 MPa
50000 psi	344.738 MPa
100000 psi	689.476 MPa
250000 psi	1723.69 MPa
500000 psi	3447.38 MPa
1000000 psi	6894.76 MPa
2500000 psi	17236.9 MPa
5000000 psi	34473.8 MPa
10000000 psi	68947.6 MPa
2.5 × 10⁷ psi	172369 MPa
5 × 10⁷ psi	344738 MPa
1 × 10⁸ psi	689476 MPa

Looking for the reverse? Convert Psi to MPa

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Conversion factors verified against NIST, BIPM, ISO 80000-4 1 atm = 101 325 Pa by definition (BIPM). Last reviewed: March 2026

By Adilson Fernandes

Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.