Definition:Millibar

Definition

The millibar is a metric unit of pressure.

It is defined as being:

The amount of pressure equal to exactly $100$ pascals.

It is usually used to measure the pressure of a gas.

Conversion Factors

\(\ds \)

\(\)

\(\ds 1\)

millibar

\(\ds \)

\(=\)

\(\ds 10^{-3}\)

bars

\(\ds \)

\(=\)

\(\ds 10^3\)

baryes

\(\ds \)

\(=\)

\(\ds 100\)

pascals

\(\ds \)

\(\approx\)

\(\ds 1 \cdotp 450377 \times 10^{-2}\)

pounds per square inch

Symbol

$\mathrm {mbar}$

The symbol for the millibar is $\mathrm {mbar}$.

The $\LaTeX$ code for \(\mathrm {mbar}\) is \mathrm {mbar} .

Historical Note

The millibar is still in use, in Europe at least, for meteorological purposes.

Linguistic Note on Milli-

The prefix milli- derives from the Latin mille, which means one thousand.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): bar
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): pressure
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): bar
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): pressure