Convert psi to mpa

Convert Pound per square inch (psi) to Megapascal (MPa) instantly.

From

Formula

value × 0.00689475729317

Sample	Converted
1 psi	0.006895 MPa
5 psi	0.034474 MPa
10 psi	0.068948 MPa
100 psi	0.689476 MPa
1,000 psi	6.894757 MPa

About psi to MPa

Convert pounds per square inch to megapascals by dividing the psi value by about 145.03773773. This is useful when high customary pressure values need to be compared with SI engineering specifications.

Psi appears often in equipment ratings, while MPa appears often in engineering and material specifications.

This conversion is useful when high-pressure values need to cross from customary units into SI design language.

A value of 10,000 psi is about 68.9476 MPa.

Use MPa for high-pressure engineering comparisons and psi for matching US customary gauges or manuals.

For safety-related work, use the full conversion factor rather than a rough estimate.

The conversion does not change gauge pressure into absolute pressure; preserve that source context.

Why Convert psi to MPa

High-pressure equipment may be rated in psi while engineering calculations use MPa.

Converting psi to MPa makes those values easier to compare in SI-based design and analysis.

This is common for hydraulics, pressure vessels, material ratings, and mechanical specifications.

High-Pressure Unit

MPa keeps large pressure values compact.

One MPa is about 145.0377 psi.

That means psi values in the thousands can become manageable MPa numbers.

Engineering Caution

Pressure ratings can be safety-critical.

Use exact conversion factors and original manufacturer specifications when possible.

Do not round aggressively near an operating limit.

Pound per square inch

Definition: Pound per square inch is a pressure unit based on one pound-force applied over one square inch.

History/Origin: Psi became common in US customary pressure measurement and remains widely used on gauges and equipment labels.

Current use: psi is used for tires, compressors, hydraulics, pneumatics, pressure gauges, industrial equipment, and service documentation.

Megapascal

Definition: A megapascal is an SI pressure unit equal to one million pascals.

History/Origin: MPa became common in engineering because high pressure and stress values are easier to read at the million-pascal scale.

Current use: MPa is used in materials engineering, hydraulics, pressure vessels, mechanical design, structural analysis, and industrial specifications.

Pound per square inch to Megapascal Conversion Table

Pound per square inch [psi]	Megapascal [MPa]
0.01 psi	0.000069 MPa
0.1 psi	0.000689 MPa
1 psi	0.006895 MPa
2 psi	0.01379 MPa
5 psi	0.034474 MPa
10 psi	0.068948 MPa
20 psi	0.137895 MPa
50 psi	0.344738 MPa
100 psi	0.689476 MPa

How to Convert Pound per square inch to Megapascal

1 psi = 0.006895 MPa

1 MPa = 145.037738 psi

Formula: value × 0.00689475729317

Example: 15 psi = 0.103421 MPa

Start with the pressure value in psi.
Use about 145.03773773 psi for each MPa.
Divide the psi value by 145.03773773.
Use MPa as the converted result.

Precision note: Use 1 MPa = 145.03773773 psi. Preserve precision for pressure ratings, design checks, and safety limits.

Common Use Cases for psi to MPa

Converting hydraulic or pressure-vessel ratings from psi into MPa.
Comparing psi equipment data with material or engineering specifications.
Preparing high-pressure values for SI-based design calculations.
Translating US customary pressure documents into metric engineering units.

FAQ

How many psi are in one MPa?

One MPa is about 145.03773773 psi.

How many MPa is 3000 psi?

3000 psi is about 20.68427188 MPa.

When should I use MPa instead of kPa?

Use MPa for high pressure or stress values where kPa numbers would be large.