What is an attopascal?

An attopascal (aPa) is an SI derived unit of pressure equal to 10^-18 pascal, representing extremely low force per unit area often used in astrophysics and ultra-high vacuum research.

What does standard atmosphere measure?

Standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals, roughly the average atmospheric pressure at sea level, used in chemistry, diving, and engineering.

Why convert attopascal to standard atmosphere?

Converting attopascal values to standard atmosphere helps compare very low pressures from specialized scientific contexts to a commonly recognized pressure unit.

Convert Attopascal (aPa) to Standard Atmosphere (atm) Easily

Quickly convert pressure values from attopascal (aPa), an extremely small SI unit of pressure, to the standard atmosphere (atm), the widely used reference pressure at sea level.

Attopascal [aPa]

Standard atmosphere [atm]

Please check your input. It must be a valid numeric value.

Attopascal [aPa] to Standard atmosphere [atm] Conversion Table

Attopascal [aPa]	Standard atmosphere [atm]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Attopascal [aPa] to Standard atmosphere [atm] Conversion Table
Attopascal [aPa]	Standard atmosphere [atm]

Explore More Pressure Units Converter

What Is This Tool?

This converter allows you to translate pressure measurements from attopascal, suitable for very low pressure scales in astrophysics and ultra-high vacuum research, into the standard atmosphere unit, commonly used in laboratories, diving, and engineering.

How to Use This Tool?

Enter the pressure value in attopascal you want to convert
Select attopascal [aPa] as the input unit and standard atmosphere [atm] as the output unit
Click the convert button to see the equivalent pressure in standard atmospheres
Use the converted value for reporting or comparison in relevant scientific or engineering contexts

Key Features

Converts pressure values from attopascal (aPa) to standard atmosphere (atm)
Browser-based and easy to use with no installation required
Supports scientific applications involving extremely low pressures
Provides results based on the precise conversion factor 1 aPa = 9.8692326671601e-24 atm

Examples

1 attopascal (aPa) converts to approximately 9.8692326671601e-24 standard atmospheres (atm)
10 attopascals equal about 9.8692326671601e-23 standard atmospheres

Common Use Cases

Expressing extremely low pressures in astrophysics and space physics
Describing residual gas pressures in ultra-high vacuum experiments
Translating theoretical pressure values close to the 10^-18 pascal scale
Reporting laboratory gas and vacuum pressures in physical chemistry
Applying reference pressures for engineering and diving calculations

Tips & Best Practices

Ensure your measurement instruments can detect pressures at the attopascal scale before converting
Use this tool to facilitate comparison between extremely low pressure values and standard conditions
Recognize that converted values may be extremely small and approach zero for practical purposes
Apply conversions primarily in scientific fields where ultra-low pressures are relevant

Limitations

Converted values from attopascal to standard atmosphere are extremely close to zero due to scale differences
Measurements must be highly precise and sensitive to make meaningful conversions
Not suitable for common atmospheric or general engineering pressure calculations

Frequently Asked Questions

What is an attopascal?: An attopascal (aPa) is an SI derived unit of pressure equal to 10^-18 pascal, representing extremely low force per unit area often used in astrophysics and ultra-high vacuum research.
What does standard atmosphere measure?: Standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals, roughly the average atmospheric pressure at sea level, used in chemistry, diving, and engineering.
Why convert attopascal to standard atmosphere?: Converting attopascal values to standard atmosphere helps compare very low pressures from specialized scientific contexts to a commonly recognized pressure unit.

Key Terminology

Attopascal (aPa): An SI derived unit representing extremely low pressure equal to 10^-18 pascal, used in astrophysics and ultra-high vacuum research.
Standard atmosphere (atm): A pressure unit defined as exactly 101,325 pascals, representative of average atmospheric pressure at sea level.

Quick Knowledge Check

What scale of pressure does the attopascal measure?

Typical atmospheric pressures

Extremely small pressures at approximately 10^-18 pascal scale

High vacuum pressures around one pascal

What is the exact definition of one standard atmosphere?

Exactly 1 pascal

Exactly 101,325 pascals

Approximately 10 pascals

In which fields is converting from attopascal to standard atmosphere most relevant?

Astrophysics and ultra-high vacuum science

Everyday weather forecasting

Residential water pressure systems

Share Us

Similar Calculators

Online Thermal Resistance Units Converter Online Surface Current Density Units Converter Online Volume Units Converter Online Volume Dry Units Converter Online Weight and Mass Units Converter