# Inch of mercury conversions

pressure conversions » inch of mercury conversionsThe inch of mercury conversion selector above selects the pressure/stress measurement unit to convert to starting from inches of mercury (inHg). To make a conversion starting from a unit of pressure other than inch of mercury, simply click on the "Reset" button.

## What is inch of mercury?

The **inch of mercury** is a non-SI unit of pressure equal to about 3,386.389 pascals (1 inHg = 3,386.389 Pa), the SI derived unit of pressure. It is also equal to 33.86389 hectopascals (hPa), or 3.386389 kilopascals (kPa), or about 0.0334172218 atmospheres (atm), or 0.0338639 bars (bar), or 25.4 millimeters of mercury at 0 °C (mmHg), or 13.5951 inches of water at 4 °C (inH2O), or 0.491098 pounds per square inch (psi), or 70.7181 pounds per square foot (psf) or 25.4 torr (Torr).

The inches of mercury is the pressure applied by a column of mercury one inch high at 0 °C in a gravitational field.

The inch of mercury unit is used in the United States and Canada for barometric pressure in aviation and weather reports.

*Notes:*

(i) The SI is an abbreviation for the International System of Units

(ii) The density of mercury at 0 °C is approximately 13.5951 g/cm3

(iii) According to the General Conference on Weight and Measures, the standard gravity is 9.80665 m/s² (or 32.1740 ft/s²)

*Symbol:*

inHg

*Plural:*

inches of mercury

## Inch of mercury conversions: direct access

A compehensive list with conversions from inches of mercury to other (metric, imperial, or customary) pressure and stress measurement units is displayed below.

- inch of mercury to atmosphere (standard) (inHg to atm)
- inch of mercury to atmosphere (technical) (inHg to at)
- inch of mercury to bar (inHg to bar)
- inch of mercury to barye (inHg to Ba)
- inch of mercury to centibar (inHg to cbar)
- inch of mercury to centimeter of mercury (inHg to cmHg)
- inch of mercury to centimeter of water (inHg to cmH2O)
- inch of mercury to decibar (inHg to dbar)
- inch of mercury to dyne per square centimeter (inHg to dyn/cm²)
- inch of mercury to gigabar (inHg to Gbar)
- inch of mercury to gigapascal (inHg to GPa)
- inch of mercury to hectopascal (inHg to hPa)
- inch of mercury to inch of water (inHg to inH2O)
- inch of mercury to kilobar (inHg to kbar)
- inch of mercury to kilogram-force per square centimeter (inHg to kgf/cm²)
- inch of mercury to kilogram-force per square millimeter (inHg to kgf/mm²)
- inch of mercury to kilopascal (inHg to kPa)
- inch of mercury to kip per square inch (inHg to ksi)
- inch of mercury to megabar (inHg to Mbar)
- inch of mercury to megapascal (inHg to MPa)
- inch of mercury to millibar (inHg to mbar)
- inch of mercury to millimeter of mercury (inHg to mmHg)
- inch of mercury to millimeter of water (inHg to mmH2O)
- inch of mercury to millipascal (inHg to mPa)
- inch of mercury to newton per square meter (inHg to N/m²)
- inch of mercury to newton per square millimeter (inHg to N/mm²)
- inch of mercury to pascal (inHg to Pa)
- inch of mercury to pieze (inHg to pz)
- inch of mercury to pound per square foot (inHg to psf)
- inch of mercury to pound per square inch (inHg to psi)
- inch of mercury to torr (inHg to Torr)