## What is the equivalent air pressure in inches of mercury?

Standard sea-level pressure, by definition, equals 760 mm (29.92 inches) of mercury, 14.70 pounds per square inch, 1,013.25 × 103 dynes per square centimetre, 1,013.25 millibars, one standard atmosphere, or 101.325 kilopascals.

## What is an equivalent pressure of 29.60 in?

1002.4 100.2
Inches of Mercury (Hg) / MilliBars / kiloPascals
In HgmBkP
29.601002.4100.2
29.611002.7100.3
29.621003.1100.3
29.631003.4100.3
Apr 12, 2007

## What pressure in millibars is equivalent to 30 inches of mercury?

1015.92
Inches of Mercury to Millibar table
Inches of MercuryMillibar
27 inHg914.32
28 inHg948.19
29 inHg982.05
30 inHg1015.92

## How do you convert air pressure to millibars?

The conversion formula to convert inch of mercury (inHg) into millibar (mbar) over the atmospheric pressure range can be calculated as follows:
1. 1 mbar = 100 pascals (Pa)
2. 1 inHg = 3386.39 pascals (Pa)
3. mbar value x 100 Pa = inHg value x 3386.39 Pa.
4. mbar value = inHg value x 33.8639.

## What is the difference between millibars and inches of mercury?

CONVERTING MILLIBARS TO INCHES OF MERCURY. 1013.25 millibars is equal to 29.92 inches of mercury. These value are the average sea level pressure in each unit.

## What is meant by mbar?

Definition of millibar

: a unit of atmospheric pressure equal to ¹/₁₀₀₀ bar or 100 pascals.

## How is inches of mercury measured?

In the U.S., the common standard to measure rough vacuum is inches of mercury (“Hg), which can be measured in two different ways. One method is as “Hg gauge (“HgV), where the scale starts at 0″ Hg (atmospheric pressure) and goes up to 29.92″ Hg, which is perfect vacuum.

## Which is the metric equivalent of the millibar MB )?

millibar, unit of air pressure in the metric system, commonly used in meteorology, equal to 100 pascals, 1,000 dynes per square cm (about 0.0145 pounds per square inch), or slightly less than one-thousandth of a standard atmosphere.

## What is the lowest MB ever recorded?

955.0 mb
The lowest confirmed barometric pressure reading, 955.0 mb (28.20 inHg), for a non-tropical system in the continental United States (CONUS) was recorded during this storm at Canton, New York. This broke the record low of this type set by the January 1886 Blizzard.

## What does 30 inch mercury mean?

That means a glass tube, with its air pumped out and sealed at its upper end and placed in a dish of mercury at its lower (open) end, would have mercury pushed by air pressure up to a height of 29.92 inches in the tube. An air pressure of 30 inches means the mercury will have risen to a height of exactly 30 inches.

## How many feet is an inch of mercury?

Inches of mercury to Feet of water
1 Inches of mercury = 1.133 Feet of water10 Inches of mercury = 11.3295 Feet of water
2 Inches of mercury = 2.2659 Feet of water20 Inches of mercury = 22.6591 Feet of water
3 Inches of mercury = 3.3989 Feet of water30 Inches of mercury = 33.9886 Feet of water

## Where does inches of mercury come from?

The unit “inches of mercury” comes from the design of the first mercury barometer invented by Evangelista Torricelli in 1643. Recognizing that the atmosphere had weight, he placed a glass tube, in which the air had been removed, into a dish of mercury.

## What is meant by inches of mercury?

A common unit used in the measurement of atmospheric pressure. 1) One inch of mercury (in Hg) is defined as that pressure exerted by a 1-in. column of mercury at standard gravity and a temperature of 0°C: This is a unit recommended for meteorological use.

## How much does an inch of mercury weigh?

One cubic inch of mercury converted to pound equals to 0.49 lb.

## How many inches of mercury is a perfect vacuum?

The absolute pressure in inches of mercury indicates the inches of mercury vacuum that a perfect vacuum pump would be able to reach. Therefore, at 5,000 feet, elevation under standard atmospheric conditions, a perfect vacuum would be 24.89 inches of mercury, as compared to 29.92 inches of mercury at sea level.

## What is mercury pressure?

Inch of mercury (inHg and ″Hg) is a non-SI unit of measurement for pressure. It is used for barometric pressure in weather reports, refrigeration and aviation in the United States. It is the pressure exerted by a column of mercury 1 inch (25.4 mm) in height at the standard acceleration of gravity.

## What is the difference between inches of mercury and inches of water?

How many inch of mercury in 1 inch of water column? The answer is 0.073555912463681. We assume you are converting between inch of mercury [0 °C] and inch of water column. You can view more details on each measurement unit: inch of mercury or inch of water column The SI derived unit for pressure is the pascal.

## Why are some vacuum pressure expressed in inches of water and others in inches of mercury?

The gauge shows the difference between the mercury levels at atmospheric pressure and the best vacuum. The scale is usually shown as 0 to 30 inches of Hg on the Bourdon dial gauges.

## Why is pressure measured in mercury?

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference.