Convert Millibar to Atmospheres

Millibar → Atmospheres
mbar × 0.0009869233 = atm atm × 1013.25 = mbar

To convert millibar (mbar) to atmospheres (atm), multiply the millibar value by 0.0009869233. 1 mbar = 0.0009869233 atm, and 1 atm = 1013.25 mbar. The conversion is a linear scaling with no offset, so the same factor applies to any value.

Going the other way? Convert atm to mbar.

mbar to atm table
Millibar (mbar) Atmospheres (atm)
0.1 mbar 0.00009869233 atm
0.5 mbar 0.0004934616 atm
1 mbar 0.0009869233 atm
2 mbar 0.001973847 atm
5 mbar 0.004934616 atm
10 mbar 0.009869233 atm
20 mbar 0.01973847 atm
50 mbar 0.04934616 atm
100 mbar 0.09869233 atm
500 mbar 0.4934616 atm
1000 mbar 0.9869233 atm