How many pascals are in one atmosphere?

One standard atmosphere (1 atm) equals exactly 101,325 pascals (Pa). This is defined by international standard and represents the mean atmospheric pressure at sea level.

How do I convert pascals to atmospheres manually?

Divide the pascal value by 101,325. For example, 202,650 Pa ÷ 101,325 = 2 atm.

What is the difference between atm and Pa?

The pascal (Pa) is the SI unit of pressure, equal to one newton per square meter. The standard atmosphere (atm) is a non-SI unit defined as 101,325 Pa. Atmospheres are commonly used in chemistry, diving, and aviation where sea-level pressure is a natural reference point.

What is 1 kPa in atmospheres?

1 kPa (kilopascal) equals approximately 0.009869 atm, since 1 kPa = 1,000 Pa and 1 atm = 101,325 Pa.

What is 1 MPa in atmospheres?

1 MPa (megapascal) equals approximately 9.869 atm, since 1 MPa = 1,000,000 Pa and 1 atm = 101,325 Pa.

Pascals to Atmospheres Converter

Name: Pascals to Atmospheres Converter
Availability: InStock
Author: Nham Vu

Enter a pressure in pascals and get the standard atmosphere equivalent instantly — supports Pa, kPa, MPa, and GPa.

Converter

Pressure in pascals

Result in atmospheres (atm)

Reverse: atmospheres to pascals

Pressure in atm

Result in Pa

Reference Table

Pascals Atmospheres (atm)

1 Pa 0.0000098692

100 Pa 0.00098692

1,000 Pa (1 kPa) 0.0098692

10,000 Pa (10 kPa) 0.098692

101,325 Pa (1 atm) 1

200,000 Pa (200 kPa) 1.97385

500,000 Pa (500 kPa) 4.93462

1,000,000 Pa (1 MPa) 9.86923

10,000,000 Pa (10 MPa) 98.6923

100,000,000 Pa (100 MPa) 986.923

1,000,000,000 Pa (1 GPa) 9,869.23

Summary

Enter a pressure in pascals and get the standard atmosphere equivalent instantly — supports Pa, kPa, MPa, and GPa.

How it works

Select the pascal unit (Pa, kPa, MPa, or GPa) from the dropdown.
Enter the pressure value in the input field.
The atmosphere (atm) result appears instantly with no button press needed.
Use the reverse field to convert atmospheres back to pascals.
Click "Copy" next to any result to copy it to your clipboard.
Check the reference table for common pascal-to-atmosphere values.

Use cases

Convert laboratory gas pressures from Pa to atm for chemistry calculations.
Express diving depth pressures in atmospheres from pascal sensor readings.
Cross-check physics experiment results that mix Pa and atm units.
Convert meteorological pressure data from Pa to atm for analysis.
Verify autoclave or pressure vessel ratings expressed in different units.
Translate industrial process pressures to atm for international datasheets.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu