Convert Standard atmosphere (atm) to Bar
Category: Pressure
1 atm = 1.01325 bar
Precision: 6 decimals; very small non-zero results use significant digits.
How to convert standard atmosphere (atm) to bar
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.
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Quick conversion table
Handy values for Standard atmosphere (atm) to Bar. Click a value to calculate that result.
| Standard atmosphere (atm) | Bar |
|---|---|
| 1.01325 | |
| 0.506625 | |
| 2.533125 | |
| 10.1325 |
Conversion formula
Use the following formula:
Bar ≈ Standard atmosphere (atm) × 1.01325
Convert pressure from Standard atmosphere (atm) to Bar using a fixed unit ratio. Round only the final result.
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 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.
Frequently asked questions
How many Bar are in one Standard atmosphere (atm)?
Is Standard atmosphere (atm) to Bar conversion exact?
What is the fastest way to convert Standard atmosphere (atm) to Bar?
Convert Standard atmosphere (atm) to other units
- atm → psi Pounds per square inch (psi)