Convert atmospheres to megapascals

1 atm=0.1013MPa

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

You have

Equals

0.10132

Conversion formula

Forward

megapascals = atmospheres × 0.1013

Reverse

atmospheres = megapascals × 9.86923

Example: 10 atm × 0.1013 = 1.01325 MPa.

About both units

From

Atmosphere

atm

The standard atmosphere equals 101,325 pascals exactly — defined by CGPM in 1954. Represents average sea-level atmospheric pressure. Used in chemistry, aviation and engineering as a reference pressure.

Real-world: Sea-level pressure: 1 atm. Mount Everest summit: ~0.33 atm. Submarine at 100 m: ~11 atm.

Read full atmosphere 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 →

Atmosphere to Megapascal conversion table

Common atmospheres to megapascals values for quick reference.

Atmosphere (atm)	Megapascal (MPa)
1 atm	0.1013 MPa
5 atm	0.5066 MPa
10 atm	1.01325 MPa
25 atm	2.53313 MPa
50 atm	5.06625 MPa
100 atm	10.1325 MPa
200 atm	20.265 MPa
500 atm	50.6625 MPa
1,000 atm	101.325 MPa
5,000 atm	506.625 MPa

Tips & common mistakes

Quick tips

1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi.
Note: atm ≠ bar. Close but not identical.
Modern SI prefers pascals; atm is a legacy reference.

Avoid these

Using 1 atm = 1 bar exactly — off by 1.3%.
Confusing standard atm with technical atmosphere (98,066.5 Pa) or atmosphere-absolute in diving.
Applying 1 atm outside sea level without correction.

Frequently asked questions

How many megapascals in a atmosphere?

One atmosphere equals 0.1013 megapascals.

How do I convert atmospheres to megapascals?

Multiply the atmosphere value by 0.1013 to get the equivalent in megapascals.

What is 100 atmospheres in megapascals?

100 atmospheres equals 10.1325 megapascals.

Is a atmosphere bigger than a megapascal?

No. 1 atmosphere equals 0.1013 megapascals, so one atmosphere is smaller.

How to convert atmospheres to megapascals without a calculator?

Multiply by 0.1 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

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