Standard atmosphere = 101 325 Pa
- Symbol
- atm
- Value
- 101 325
- Unit
- Pa
- Uncertainty
- exact (by definition)
- Copy-ready
101325
Exactly 101 325 pascals by definition. Sea-level pressure varies around it by a few percent with the weather.
NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.
Practical reference values
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UsePhysics. "Standard atmosphere — 101 325 Pa." UsePhysics.com. https://usephysics.com/reference/standard-atmosphere. Value from the 2022 CODATA adjustment (NIST). Accessed [date].