Bar
The bar is a metric pressure unit equal to exactly 100,000 pascals, slightly below one standard atmosphere.
Bars are common in European tire pressure gauges, scuba diving, and industrial compressed-air systems.
Bar to Standard Atmosphere
Convert bar to standard atmosphere instantly. Type in either field — results update live.
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Pressure Bar Standard Atmosphere
1 bar = 0.9869232667 standard atmospheres
Unit
Unit
Conversion table
Selected bar values converted to atm using the exact factor from this tool.
| bar | atm |
|---|---|
| 0.01 | 0.0098692327 |
| 0.1 | 0.0986923267 |
| 1 | 0.9869232667 |
| 2 | 1.9738465334 |
| 3 | 2.9607698001 |
| 5 | 4.9346163336 |
| 10 | 9.8692326672 |
| 20 | 19.7384653343 |
| 50 | 49.3461633358 |
| 100 | 98.6923266716 |
| 1,000 | 986.923266716 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 bar = 0.9869232667 atm
1 atm = 1.01325 bar
To convert bar to standard atmosphere, multiply by 0.9869232667.
To convert standard atmosphere to bar, multiply by 1.01325.
Example: convert 10 bar to atm
10 × 0.9869232667 = 9.8692326672 atm
About these units
Short background on the units used in this conversion.
Standard Atmosphere (atm)
The standard atmosphere (atm) is defined as exactly 101,325 pascals — average sea-level atmospheric pressure.
Atmospheres compare scuba tank fills, describe laboratory reference pressure, and normalize gas volumes.
Frequently asked questions
How many standard atmospheres are in one bar?
One bar equals 0.9869232667 standard atmospheres. Multiply your bars value by 0.9869232667 to convert to standard atmospheres.
What is the conversion formula?
atm = bar × 0.9869232667The reverse is
bar = atm × 1.01325, using the same exact factors as this converter.Is this Bar to Standard Atmosphere converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All bar conversions
Jump to any pressure conversion starting from bar — including the reverse direction and every other unit in our dataset.
standard atmosphere (atm) → bar
bar → pascal (Pa)bar → kilopascal (kPa)bar → megapascal (MPa)bar → pound per square inch (psi) (psi)bar → hectopascal (hPa)bar → millibar (mbar)bar → torrbar → millimeter mercury (0°c) (mmHg)bar → newton per square meter (N/m²)bar → kip per square inch (ksi) (ksi)bar → exapascal (EPa)bar → petapascal (PPa)bar → terapascal (TPa)bar → gigapascal (GPa)bar → dekapascal (daPa)bar → decipascal (dPa)bar → centipascal (cPa)bar → millipascal (mPa)bar → micropascal (µPa)bar → nanopascal (nPa)bar → picopascal (pPa)bar → femtopascal (fPa)bar → attopascal (aPa)bar → newton per square centimeter (N/cm²)bar → newton per square millimeter (N/mm²)bar → kilonewton per square meter (kN/m²)bar → microbar (µbar)bar → dyne per square centimeter (dyn/cm²)bar → kilogram-force per square meter (kgf/m²)bar → kilogram-force per square centimeter (kgf/cm²)bar → kilogram-force per square millimeter (kgf/mm²)bar → gram-force per square centimeter (gf/cm²)bar → ton-force (short) per square foot (tonf/ft²)bar → ton-force (short) per square inch (tonf/in²)bar → ton-force (long) per square foot (long tonf/ft²)bar → ton-force (long) per square inch (long tonf/in²)bar → kip-force per square inch (kip/in²)bar → pound-force per square foot (lbf/ft²)bar → pound-force per square inch (lbf/in²)bar → poundal per square foot (pdl/ft²)bar → centimeter mercury (0°c) (cmHg)bar → inch mercury (32°f) (inHg)bar → inch mercury (60°f) (inHg)bar → centimeter water (4°c) (cmH₂O)bar → millimeter water (4°c) (mmH₂O)bar → inch water (4°c) (inAq)bar → foot water (4°c) (ftAq)bar → inch water (60°f) (inAq)bar → foot water (60°f) (ftAq)bar → atmosphere technical (at)