HPA and mb?

Question

i know that 1 is milibars, and the other is a hectopascal, but i was wondering if any1 knew the conversion rate between the two?

Answer 1

They are the same. The only conversion you would need would be with mmHg,(millimeters of mercury)

Answer 2

One pascal equals 0.01 millibar or 0.00001 bar.

When the change to scientific unit occurred in the 1960's many meteorologists preferred to keep using the magnitude they are used to and use a prefix "hecto" (h), meaning 100.

Therefore, 1 hectopascal (hPa) equals 100 Pa which equals 1 millibar. 100,000 Pa equals 1000 hPa which equals 1000 millibars. The end result is although the units we refer to in meteorology may be different, their numerical value remains the same. For example the standard pressure at sea-level is 1013.25 millibars and 1013.25 hPa.

http://www.srh.noaa.gov/jetstream/atmos/...