In engineering and fluid mechanics, pressure is defined as force applied perpendicular to the surface of an object per unit area. The SI derived unit for pressure is the Pascal (Pa), defined as one newton per square meter (\(1 \text{ Pa} = 1 \text{ N/m}^2\)). Because the Pascal represents a very small amount of pressure, engineers frequently use the Megapascal (MPa) for practical applications.
The Megapascal is a decimal multiple of the Pascal, where the prefix 'mega' denotes a factor of one million. Therefore, \(1 \text{ MPa} = 10^6 \text{ Pa}\).
Pascal (Pa): Used in low-pressure systems, acoustics, and atmospheric science.
Megapascal (MPa): The standard unit for structural engineering, material strength (yield strength, tensile strength), and high-pressure hydraulic systems.
Megapascal to Pascal Conversion Reference Table
Megapascal (MPa)
Pascal (Pa)
0.1
100000
0.5
500000
1.0
1000000
2.0
2.0000e+06
5.0
5.0000e+06
10.0
1.0000e+07
20.0
2.0000e+07
50.0
5.0000e+07
100.0
1.0000e+08
500.0
5.0000e+08
1000.0
1.0000e+09
Conversion Example: 10 MPa to Pa
To convert pressure from Megapascals to Pascals, multiply the value by 1,000,000. The calculation is as follows:
The Pascal is an extremely small unit relative to the forces involved in structural materials. For example, the yield strength of structural steel is typically around 250 MPa. Expressing this as 250,000,000 Pa is cumbersome and prone to transcription errors in technical documentation.
Yes, they are numerically equivalent. Since 1 MPa is 1,000,000 N/m² and there are 1,000,000 mm² in a square meter, 1 MPa is exactly equal to 1 N/mm². This makes MPa a very convenient unit for calculating stress in mechanical design.
"On fait la science avec des faits, comme on fait une maison avec des pierres ; mais une accumulation de faits n'est pas plus une science qu'un tas de pierres n'est une maison." "Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house." — Henri Poincaré (French Mathematician, Theoretical Physicist & Mining Engineer)