How many pascals are in 1 inHg?

One inch of mercury (inHg) equals exactly 3,386.389 pascals. This is based on the conventional definition: the pressure exerted by a 1-inch column of mercury at 32 °F (0 °C) under standard gravity (9.80665 m/s²) with mercury density 13,595.1 kg/m³.

What is standard atmospheric pressure in inHg?

Standard atmospheric pressure is 101,325 Pa, which equals 29.921 inHg. US aviation uses 29.92 inHg as the standard setting for altimeters at mean sea level.

What is a typical barometric pressure reading in inHg?

Fair weather typically shows 29.8–30.2 inHg (100,845–102,269 Pa). Readings above 30.2 inHg indicate high pressure (clear skies); below 29.6 inHg suggests a storm system approaching.

How do I convert kPa to inHg?

Multiply the kPa value by 0.295300. For example, 100 kPa × 0.295300 = 29.530 inHg. This tool does the calculation automatically when you select kPa as the input unit.

Is inHg the same as inches Hg or "Hg?

Yes. "inHg", "in. Hg", and the symbol '"Hg' all refer to the same unit — inches of mercury. In aviation altimetry, the unit is also sometimes written as "in. Hg" on physical gauges.

Pascals to inHg Converter

Name: Pascals to inHg Converter
Availability: InStock
Author: Nham Vu

Enter a pressure in Pa or kPa and get the equivalent in inches of mercury (inHg) instantly.

Pressure Converter

Input unit

Pa kPa

Value

inHg

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kPa (equivalent)

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Copied!

Quick Reference Table

Pascals (Pa)	inHg	Context

inHg	Pascals (Pa)	Context

1 inHg = 3,386.389 Pa • 1 kPa = 0.295300 inHg • 1 atm = 29.921 inHg = 101,325 Pa

Summary

Enter a pressure in Pa or kPa and get the equivalent in inches of mercury (inHg) instantly.

How it works

Select your input unit: Pa or kPa.
Type the pressure value into the input field.
The converter shows the equivalent in inHg instantly.
Click the swap button to convert inHg back to Pa.
Copy either result with the copy button next to each value.
Scroll down for a quick-reference table of common pressures.

Use cases

Convert barometric pressure from Pa (weather APIs) to inHg for US-standard weather displays.
Set an aviation altimeter: translate QNH in Pa to the inHg setting required by US aircraft.
Convert HVAC static pressure specs between Pa (SI) and inHg (US duct design standards).
Cross-check a pressure transducer output in Pa against an inHg-rated manometer.
Translate meteorological data published in Pa to the inHg scale used by US broadcasters.
Verify vacuum pump performance specs given in Pa against inHg-rated vacuum gauges.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu