In 1 pascals there are 0.00000986923 atmospheres. Meanwhile in 1 atmospheres there are 101,325 pascals. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Atmospheres to Pascals calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert pascals (Pa) to atmospheres (atm), divide the pressure in pascals by 101,325. This works because 1 atm = 101,325 Pa.
Formula:
Example:
This Pa to atm conversion is common in chemistry, physics, and diving, where pressure is often shown in atmospheres instead of pascals.
Divide the pressure in pascals by 101,325.
Formula:
atm = Pa ÷ 101,325
Example:
202,650 Pa ÷ 101,325 = 2 atm
1 atm = 101,325 Pa (exact by definition).
This value is also close to standard sea-level air pressure.
1 Pa = 0.00000986923 atm (about 9.86923 × 10⁻⁶ atm).
This shows how small a pascal is compared to an atmosphere.
An atmosphere (atm) is a standard pressure unit based on average sea-level air pressure. It was set to match that common reference point, and the exact value is 101,325 Pa.
Pa is common in science and engineering. atm is common in chemistry, gas laws, and lab work.
100,000 Pa ÷ 101,325 = 0.986923 atm (about 0.987 atm).
101,325 Pa ÷ 101,325 = 1 atm.
1,000,000 Pa ÷ 101,325 = 9.86923 atm (about 9.87 atm).
Multiply the pressure in atmospheres by 101,325.
Formula:
Pa = atm × 101,325
Example:
2 atm × 101,325 = 202,650 Pa
Often, yes. Many pressure values are given in kilopascals (kPa).
kPa to atm: atm = kPa ÷ 101.325
Standard atmospheric pressure is:
You may also see it written as 101.325 kPa.
It depends on your need.
Rounding too early can change results in later steps.
In most real cases, pressure values are not negative. Absolute pressure starts at zero (a vacuum). Negative values can appear with gauge pressure, where zero is set to local air pressure.
If you see a negative Pa value, check if the pressure is gauge or absolute.
Atmospheres are common in:
Pascals are common in:
Use 100,000 Pa as a rough stand-in for 1 atm.
For exact work, use 101,325 Pa per atm.
The Calculate Box tool to convert pascals to atmospheres uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a pascals value in the box and have it instantly converted to atmospheres.