How do I convert Standard atmosphere (atm) to Bar?

1 atm equals 1.01325 bar using SI-based conversion and precise factors.

What is the formula to convert Standard atmosphere (atm) to Bar?

This is a linear unit conversion using a constant factor between units.

How can I share a direct atm to bar result?

Use the shareable URL: https://measurecalc.com/convert/atmosphere-to-bar

Convert Standard atmosphere (atm) to Bar

Q: Is Standard atmosphere (atm) to Bar conversion exact?

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Category: Pressure

Value From To Precision

1.01325 bar

1 atm = 1.01325 bar

High-precision rounding: 6 decimals

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.

This converter calculates Standard atmosphere (atm) to Bar values by using the correct conversion rule for the Pressure category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.

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Quick conversion table

Handy values for Standard atmosphere (atm) to Bar. Click a value to open that exact result.

Standard atmosphere (atm)	Bar
1	1.01325
0.5	0.506625
2.5	2.533125
10	10.1325

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 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)?

1 Standard atmosphere (atm) equals 1.01325 Bar.

Is Standard atmosphere (atm) to Bar conversion exact?

Many unit conversions are exact by definition, while others use standardized conversion constants.

What is the fastest way to convert Standard atmosphere (atm) to Bar?

Enter a value in Standard atmosphere (atm), choose Bar as the target unit, and the calculator will instantly return the result.

Convert Standard atmosphere (atm) to other units

atm → pa Pascal (Pa)
atm → psi Pounds per square inch (psi)
atm → torr Torr

Convert other units to Bar

pa → bar Pascal (Pa)
psi → bar Pounds per square inch (psi)
torr → bar Torr