Convert psi to megapascals

1 psi=0.006895MPa

Use the converter below to change any psi value into megapascals instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.0068948

Conversion formula

Forward

megapascals = psi × 0.006895

Reverse

psi = megapascals × 145.038

Example: 10 psi × 0.006895 = 0.06895 MPa.

About both units

From

Pound per Square Inch

psi

Pounds per square inch equals approximately 6895 Pa. It is the dominant pressure unit in the US — tyre pressures, plumbing, compressed air. Standard US tyre pressure: 32–35 psi.

Real-world: US tyre: 32–35 psi. Water supply: 40–60 psi. SCUBA tank: 3000 psi. Car AC system: 30–200 psi.

Read full pound per square inch reference →

Megapascal

MPa

The megapascal equals 1,000,000 pascals or 10 bar. Used for high-pressure engineering — hydraulic systems, material strength, concrete compression tests. 1 MPa is roughly the pressure of a 100-tonne weight on 1 m².

Real-world: Concrete compressive strength: 20–60 MPa. Hydraulic press: 30–70 MPa. Steel yield strength: 250+ MPa.

Read full megapascal reference →

Pound per Square Inch to Megapascal conversion table

Common psi to megapascals values for quick reference.

Pound per Square Inch (psi)	Megapascal (MPa)
1 psi	0.006895 MPa
5 psi	0.03447 MPa
10 psi	0.06895 MPa
25 psi	0.1724 MPa
50 psi	0.3447 MPa
100 psi	0.6895 MPa
200 psi	1.37895 MPa
500 psi	3.44738 MPa
1,000 psi	6.89476 MPa
5,000 psi	34.4738 MPa

Tips & common mistakes

Quick tips

1 psi ≈ 6.9 kPa = 0.069 bar.
14.7 psi = 1 atm = 1.01 bar.
Most US pressure gauges show psi.

Avoid these

Setting a European tyre at 35 bar instead of 35 psi — disaster.
Confusing psi (gauge) with psia (absolute).
Using psi in scientific papers — prefer Pa or MPa.

Frequently asked questions

How many megapascals in a pound per square inch?

One pound per square inch equals 0.006895 megapascals.

How do I convert psi to megapascals?

Multiply the pound per square inch value by 0.006895 to get the equivalent in megapascals.

What is 100 psi in megapascals?

100 psi equals 0.6895 megapascals.

Is a pound per square inch bigger than a megapascal?

No. 1 pound per square inch equals 0.006895 megapascals, so one pound per square inch is smaller.

How to convert psi to megapascals without a calculator?

Multiply by 0.01 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

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