Atm to Pascals Converter
Convert pressure from standard atmospheres (atm) to pascals (Pa). One standard atmosphere is defined as exactly 101,325 pascals, so the calculator multiplies your atm value by 101,325. It also shows the equivalent in kilopascals for convenience.
Formula
P(Pa) = P(atm) × 101,325
- One standard atmosphere (atm) is defined as exactly 101,325 pascals.
- To convert atm to pascals, multiply by 101,325; to go the other way, divide pascals by 101,325.
- 1 atm also equals 101.325 kPa, 1.01325 bar or about 14.696 psi.
- The pascal (Pa) is the SI unit of pressure, equal to one newton per square metre.
Example: 1 atm
Inputs
- Pressure (atm): 1
One standard atmosphere converts to 1 × 101,325 = 101,325 Pa, which is 101.325 kPa.
Frequently asked questions
How many pascals are in one atmosphere?
Exactly 101,325 pascals. The standard atmosphere is defined as this value, so the conversion is exact.
How do I convert atm to pascals?
Multiply the pressure in atmospheres by 101,325. For example, 2 atm = 202,650 Pa.
What is the relationship between atm and kPa?
1 atm equals 101.325 kPa, because there are 1,000 pascals in a kilopascal.
Is the pascal an SI unit?
Yes. The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre.
Is standard atmosphere the same as atmospheric pressure?
Not always. Standard atmosphere is a fixed reference of 101,325 Pa, whereas actual atmospheric pressure varies with weather and altitude.