Convert inches of mercury to torr

Explanation

From this page you can convert inches of mercury to torr (or inHg to Torr) simply, by using the application above.

In case you are wondering, to convert from inches of mercury to torr you need to multiply by 25.4. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 inHg≈25.4 Torr

inches of mercuryinHg

dimension	pressure
symbol	inHg
synonyms	conventional

The conventional inch of mercury (inHg) is a unit of pressure.

Definition of the inch of mercury

The conventional inch of mercury is defined using the density of mercury at 0 °C, 13595.1 kg/m³ and the standard gravity.

Value in terms of the SI

One conventional inch of mercury is approximately 3386.389 pascals.

NIST Guide to the SI, Appendix B.9

Equivalences

One conventional inch of mercury is equivalent to:

Other mercury units

inch of mercury	inHg	1
foot of mercury	ftHg	12
inch of mercury at 32 °F	-
inch of mercury at 60 °F	-

Related Conversions

torrTorr

dimension	pressure
symbol	Torr

The torr (Torr) a deprecated unit of pressure.

Definition of the torr

One torr is equal to ¹⁰¹³²⁵⁄₇₆₀ pascals.

The International System of Units 1^st edition p. 16

Equivalences

One torr is equivalent to:

History

The torr and millimeter of mercury were once exactly equivalent before their respective definitions diverged when the torr was redefined as 1/760 of the standard atmosphere. The two units are still very similar, one torr behing approximately equal to 0.999999858 millimeter of mercury.

The unit is named after Evangelista Torricelli, an Italian physicist who discovered the principle of the barometer.

Other torr units

millitorr	mTorr	0.001
torr	Torr	1
kilotorr	kTorr	1000
megatorr	MTorr	1 000 000