ucUnitCloudInternational unit matrix

Convert

Atmosphere to bar

bar, psi and atm appear in different fields. Tyre, weather and lab values need context.

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Convert units with formula, context and precision

UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

From1 atm
Result1.01325 bar
Factor1 atm = 1.01325 bar
Source basisBIPM SI Brochure · NIST Guide to SI Appendix B.8

Examples

011 atm = 1.01325 bar

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

bar, psi and atm appear in different fields. Tyre, weather and lab values need context.

03Base unit: Pa

1 atm = 101,325 Pa. Then the value is converted through the base unit Pa into bar.

Table

Atmospherebar
11.01325
22.0265
55.06625

Formula

1 atm = 101,325 Pa. Then the value is converted through the base unit Pa into bar.

Sources

BIPM SI BrochureSI base units, prefixes and official SI context.NIST Guide to SI Appendix B.8Alphabetical conversion factors including pressure and force units.

Related conversions

bar to psibar → psiPressurepsi to barpsi → barPressureKilopascal to psikPa → psiPressure

Search and practice paths

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view
psiTyre pressure, bar and psi
Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources current as of May 2026. Pressure. Source basis: BIPM SI Brochure · NIST Guide to SI Appendix B.8.

Common questions

What is the factor for Atmosphere to bar?

1 atm = 1.01325 bar

Which formula does Atmosphere to bar use?

1 atm = 101,325 Pa. Then the value is converted through the base unit Pa into bar.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.