Convert Standard atmosphere (atm) (atm) to Bar (bar)
Category: Pressure
1 atm = 1.01325 bar
High-precision rounding: 6 decimals
How to convert standard atmosphere (atm) to bar
We convert by pivoting through the SI base unit for Pressure and applying exact factors where applicable.
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Quick conversion table
Handy values for Standard atmosphere (atm) → Bar. Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Comparing gauge pressure (psig) with absolute pressure (psia/hPa) without converting reference.
- Mixing bar with atm (1 atm = 1.01325 bar).
Unit facts
- Standard atmosphere (atm): Standard atmosphere is exactly 101,325 Pa; reference pressure in chemistry and physics.
- Bar: One bar is exactly 100,000 Pa; convenient near-atmospheric unit used in meteorology and diving.
About Pressure
Pressure is force per unit area. Pascals (and kPa, hPa) are SI, while bar and psi are widely used in engineering and scuba. Conversions must respect absolute vs gauge references when comparing values.
About Standard atmosphere (atm)
Standard atmosphere (atm)
Exactly 101,325 Pa. Reference pressure for chemistry and gas laws; useful for normalizing conditions.
History: A conventional unit set for convenience in calculations and comparative tables.
About Bar
Bar
Equals 100,000 Pa (exact). Handy engineering unit near mean sea-level pressure (≈1.01325 bar).
History: Introduced by early 20th-century meteorologists; remains popular in scuba, hydraulics, and weather.
Related conversions from atm
- atm → pa Pascal (Pa)
- atm → psi Pounds per square inch (psi)
- atm → torr Torr
Related conversions to bar
- pa → bar Pascal (Pa)
- psi → bar Pounds per square inch (psi)
- torr → bar Torr