Convert attopascal to pascal

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Attopascal

The attopascal (symbol: aPa) is a unit of pressure equal to 10⁻¹⁸ pascals, formed by applying the SI prefix atto- to the pascal. It is the smallest named SI-prefixed pascal unit in common use and represents pressures far below anything currently achievable in laboratory vacuum systems. One attopascal equals 10⁻¹⁸ N/m². 


Pascal

The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre (N/m²). It was adopted by the General Conference on Weights and Measures in 1971 and named after the French mathematician and physicist Blaise Pascal. Standard atmospheric pressure is approximately 101,325 Pa, and it is widely used in science, engineering, and meteorology. 


Attopascal to Pascal conversion table
AttopascalPascalPascalAttopascal
11E-1811E+18
22E-1822E+18
33E-1833E+18
55E-1855E+18
101E-17101E+19
202E-17202E+19
252.5E-17252.5E+19
505E-17505E+19
1001E-161001E+20
2502.5E-162502.5E+20
5005E-165005E+20
10001E-1510001E+21
How to convert Attopascal to Pascal

1 aPa = 1E-18 Pa. To convert any value, multiply it by 1E-18. For example, 25 aPa = 2.5E-17 Pa.

Frequently asked questions
How many Pa are there in one aPa?
One aPa is equal to 1E-18 Pa.
How do you convert Attopascal to Pascal?
Multiply the value in Attopascal by 1E-18 to get the result in Pascal.
How much is 25 aPa in Pa?
25 aPa is equal to 2.5E-17 Pa.
How do you convert Pascal back to Attopascal?
Divide by the same factor: multiply the value in Pascal by 1E+18 to get Attopascal.

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