Pressure conversion

Convert Millibar to Standard atmosphere

1 millibar (mbar) equals 0.000986923267 standard atmosphere (atm). Enter any value below to convert from mbar to atm.

Enter a value and choose units. Results update instantly.

1 mbar = 0.0009869233 atm

All Pressure units

From 1 mbar
UnitValue
Pascal Pa 100
Kilopascal kPa 0.1
Megapascal MPa 0.0001
Bar bar 0.001
Millibar mbar 1
Standard atmosphere atm 0.0009869233
Pound per square inch psi 0.0145037738
Torr Torr 0.7500616827
Millimeter of mercury mmHg 0.7500615758
Inch of mercury inHg 0.0295299802
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Formula

mbar to atm conversion formula

Use this relationship for a direct conversion:

atm = mbar x 0.000986923267

Worked example

2 mbar = 0.0019738465 atm.

Conventional mercury-column units are not measurements adjusted for local temperature or gravity.

Quick reference

Millibar to Standard atmosphere table

Millibar (mbar)Standard atmosphere (atm)
0.010.0000098692
0.10.0000986923
10.0009869233
20.0019738465
50.0049346163
100.0098692327
250.0246730817
500.0493461633
1000.0986923267
1,0000.9869232667

From unit

About the millibar

Exactly 100 pascals.

Symbol: mbar

To unit

About the standard atmosphere

Exactly 101,325 pascals.

Symbol: atm

Keep converting

Related conversions

Standard atmosphere to MillibarReverse this conversion Millibar to Pascalmbar to PaMillibar to Kilopascalmbar to kPaMillibar to Megapascalmbar to MPaMillibar to Barmbar to barMillibar to Pound per square inchmbar to psiMillibar to Torrmbar to Torr

Source

Conversion standard

Definitions are checked against NIST SP 811: Pressure units. Calculations use full internal precision before display rounding.

View the complete pressure converter

Questions

mbar to atm FAQ

How do you convert millibar to standard atmosphere?

Use the formula atm = mbar x 0.000986923267. 1 millibar (mbar) equals 0.000986923267 standard atmosphere (atm).

Is the mbar to atm conversion exact?

Both unit definitions use exact factors. Only the displayed decimal may be rounded.