millibar
Pressureexact by definition
The millibar is one thousandth of a bar, exactly 100 pascals, and therefore exactly one hectopascal. It remains the everyday pressure unit in aviation, marine forecasting and vacuum work, and North American weather reporting never really let go of it.
Watch out: Rough and medium vacuum is quoted in mbar across most of the world and in Torr in the United States. One millibar is 0.75 Torr, so the two scales are close enough to look interchangeable at a glance and are not.
| 1 | 0.1 |
One millibar in every pressure unit
| 1,000 | microbar (μbar) | |
| 1,000 | barye (Ba) | |
| 750.062 | millitorr (mTorr) | |
| 100 | pascal (Pa) | |
| 10.1972 | millimeter of water column (mmH₂O) | |
| 2.08854 | pound per square foot (lb/ft²) | |
| 1.01972 | centimeter of water column (cmH₂O) | |
| 1 | hectopascal (hPa) | |
| 1 | millibar (mbar)this unit | |
| 0.750062 | torr (Torr) | |
| 0.750062 | millimeter of mercury (mmHg) | |
| 0.401463 | inch of water column (in w.g.) | |
| 0.1 | kilopascal (kPa) | |
| 0.0334553 | foot of water column (ft H₂O) | |
| 0.02953 | inch of mercury (inHg) | |
| 0.0145038 | pound per square inch (psi) | |
| 0.0101972 | meter of water column (m H₂O) | |
| 0.01 | decibar (dbar) | |
| 0.00101972 | kilogram-force per square centimeter (kgf/cm²) | |
| 0.001 | bar (bar) | |
| 0.000986923 | atmosphere (atm) | |
| 0.0001 | megapascal (MPa) | |
| 0.0000145038 | kip per square inch (ksi) | |
| 1.00000e-07 | gigapascal (GPa) | |
| 1.45038e-08 | million pounds per square inch (Mpsi) |
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