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.
Standard Atmosphere to Bar
Convert standard atmosphere to bar instantly. Type in either field — results update live.
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Pressure Standard Atmosphere Bar
1 standard atmosphere = 1.01325 bars
Unit
Unit
Conversion table
Selected atm values converted to bar using the exact factor from this tool.
| atm | bar |
|---|---|
| 0.01 | 0.0101325 |
| 0.1 | 0.101325 |
| 1 | 1.01325 |
| 2 | 2.0265 |
| 3 | 3.03975 |
| 5 | 5.06625 |
| 10 | 10.1325 |
| 20 | 20.265 |
| 50 | 50.6625 |
| 100 | 101.325 |
| 1,000 | 1,013.25 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 atm = 1.01325 bar
1 bar = 0.9869232667 atm
To convert standard atmosphere to bar, multiply by 1.01325.
To convert bar to standard atmosphere, multiply by 0.9869232667.
Example: convert 10 atm to bar
10 × 1.01325 = 10.1325 bar
About these units
Short background on the units used in this conversion.
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.
Frequently asked questions
How many bars are in one standard atmosphere?
One standard atmosphere equals 1.01325 bars. Multiply your standard atmospheres value by 1.01325 to convert to bars.
What is the conversion formula?
bar = atm × 1.01325The reverse is
atm = bar × 0.9869232667, using the same exact factors as this converter.Is this Standard Atmosphere to Bar converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All standard atmosphere conversions
Jump to any pressure conversion starting from standard atmosphere — including the reverse direction and every other unit in our dataset.
bar → standard atmosphere (atm)
standard atmosphere (atm) → pascal (Pa)standard atmosphere (atm) → kilopascal (kPa)standard atmosphere (atm) → megapascal (MPa)standard atmosphere (atm) → pound per square inch (psi) (psi)standard atmosphere (atm) → hectopascal (hPa)standard atmosphere (atm) → millibar (mbar)standard atmosphere (atm) → torrstandard atmosphere (atm) → millimeter mercury (0°c) (mmHg)standard atmosphere (atm) → newton per square meter (N/m²)standard atmosphere (atm) → kip per square inch (ksi) (ksi)standard atmosphere (atm) → exapascal (EPa)standard atmosphere (atm) → petapascal (PPa)standard atmosphere (atm) → terapascal (TPa)standard atmosphere (atm) → gigapascal (GPa)standard atmosphere (atm) → dekapascal (daPa)standard atmosphere (atm) → decipascal (dPa)standard atmosphere (atm) → centipascal (cPa)standard atmosphere (atm) → millipascal (mPa)standard atmosphere (atm) → micropascal (µPa)standard atmosphere (atm) → nanopascal (nPa)standard atmosphere (atm) → picopascal (pPa)standard atmosphere (atm) → femtopascal (fPa)standard atmosphere (atm) → attopascal (aPa)standard atmosphere (atm) → newton per square centimeter (N/cm²)standard atmosphere (atm) → newton per square millimeter (N/mm²)standard atmosphere (atm) → kilonewton per square meter (kN/m²)standard atmosphere (atm) → microbar (µbar)standard atmosphere (atm) → dyne per square centimeter (dyn/cm²)standard atmosphere (atm) → kilogram-force per square meter (kgf/m²)standard atmosphere (atm) → kilogram-force per square centimeter (kgf/cm²)standard atmosphere (atm) → kilogram-force per square millimeter (kgf/mm²)standard atmosphere (atm) → gram-force per square centimeter (gf/cm²)standard atmosphere (atm) → ton-force (short) per square foot (tonf/ft²)standard atmosphere (atm) → ton-force (short) per square inch (tonf/in²)standard atmosphere (atm) → ton-force (long) per square foot (long tonf/ft²)standard atmosphere (atm) → ton-force (long) per square inch (long tonf/in²)standard atmosphere (atm) → kip-force per square inch (kip/in²)standard atmosphere (atm) → pound-force per square foot (lbf/ft²)standard atmosphere (atm) → pound-force per square inch (lbf/in²)standard atmosphere (atm) → poundal per square foot (pdl/ft²)standard atmosphere (atm) → centimeter mercury (0°c) (cmHg)standard atmosphere (atm) → inch mercury (32°f) (inHg)standard atmosphere (atm) → inch mercury (60°f) (inHg)standard atmosphere (atm) → centimeter water (4°c) (cmH₂O)standard atmosphere (atm) → millimeter water (4°c) (mmH₂O)standard atmosphere (atm) → inch water (4°c) (inAq)standard atmosphere (atm) → foot water (4°c) (ftAq)standard atmosphere (atm) → inch water (60°f) (inAq)standard atmosphere (atm) → foot water (60°f) (ftAq)standard atmosphere (atm) → atmosphere technical (at)