inches of mercury (inHg)

inches of mercury as a conversion hub: 7 direct pairs, all with the exact factor on the page.

Definition1 inHg = 3.386389 kPa exactly

CategoryPressure Converter

Pairs from here7

Pressure Converter

—

inches of mercury converted to every other unit

inHg	kPa	bar	psi	atm	mmHg	hPa	MPa
1 inHg	3.386389	0.03386389	0.4911542	0.03342106	25.400003	33.86389	0.003386389
2 inHg	6.772778	0.06772778	0.9823084	0.06684212	50.800005	67.72778	0.006772778
5 inHg	16.931945	0.16931945	2.455771	0.1671053	127	169.319	0.01693195
10 inHg	33.86389	0.3386389	4.911542	0.33421061	254	338.639	0.03386389
20 inHg	67.72778	0.6772778	9.823084	0.66842122	508	677.278	0.06772778
50 inHg	169.319	1.693194	24.55771	1.671053	1,270	1,693.19	0.16931945
100 inHg	338.639	3.386389	49.11542	3.342106	2,540	3,386.39	0.3386389

All conversions starting from inHg

inHg to kPa inHg to bar inHg to psi inHg to atm inHg to mmHg inHg to hPa inHg to MPa

Questions

How do I convert from inches of mercury?

Pick the target unit from the table on this page, or open the dedicated pair page — each one carries a converter, a table of common values and the exact factor.

Is inches of mercury exact or approximate?

The factor shown (1 inHg = 3.386389 kPa) is fixed by definition, so conversions are exact rather than measured.

What is inches of mercury used for?

inches of mercury as used in practical measurements