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How many millibars are in an inch?

Updated: 8/9/2023
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12y ago

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33.8637526

1 Bar is an arbitrary "standard atmospheric pressure" which is roughly 29 and a half inches of Mercury. If you multiply the inches-of-mercury value by 33.8637526 you get the pressure in millibars

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15y ago
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12y ago

The prefix "milli-" means "one-thousandth". Just as a millimetre is a thousandth of a metre, a millilitre is a thousandth of a litre, a millipascal is a thousandth of a pascal, so is a millibar a thousandth of a bar.

You will never have to ask the meaning of a word starting with "milli-" ever again.

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13y ago

29.92" Hg = 1013.25 mb

1" Hg = 1013.25/29.92 = 33.8653 mb (rounded)

Doesn't matter where it is. It's just a straightforward numerical conversion.

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13y ago

One inch of mercury is equal to: 33.9 millibars.

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12y ago

None. The two are separate units of measurement. One is barometric pressure, the other is a unit of length.

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13y ago

There are 33.87 millibars in an inch, therefore there are 1016.1 millibars in thirty inches.

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14y ago

30 inches of mercury is 1,020 millibars.

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6y ago

998.98 millibars.

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Q: How many millibars are in an inch?
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