Convert inches of mercury to pascals

1 inHg=3,386.39Pa

Use the converter below to change any inches of mercury value into pascals instantly — with formula, conversion table, and real-world examples.

You have

Equals

3,386.39

Conversion formula

Forward

pascals = inches of mercury × 3,386.39

Reverse

inches of mercury = pascals × 0.0002953

Example: 10 inHg × 3,386.39 = 33,863.89 Pa.

About both units

From

Inch of Mercury

inHg

The inch of mercury equals about 3386 Pa. Used in US barometers, US aviation altimeter settings and some engineering. Standard sea-level pressure: 29.92 inHg.

Real-world: Sea-level standard: 29.92 inHg. Mountain pass at 3000 m: ~21 inHg. US aviation QNH given in inHg.

Read full inch of mercury reference →

Pascal

The pascal is the SI unit of pressure — one newton per square metre. Named after Blaise Pascal. 1 Pa is a very small pressure; atmospheric pressure is about 101,325 Pa. Pressure readings in engineering are usually in kPa or MPa.

Real-world: Atmospheric pressure: 101,325 Pa. Conversation level: 0.001 Pa sound pressure. Truck tyre: 900,000 Pa.

Read full pascal reference →

Inch of Mercury to Pascal conversion table

Common inches of mercury to pascals values for quick reference.

Inch of Mercury (inHg)	Pascal (Pa)
1 inHg	3,386.39 Pa
5 inHg	16,931.95 Pa
10 inHg	33,863.89 Pa
25 inHg	84,659.73 Pa
50 inHg	169,319.45 Pa
100 inHg	338,638.9 Pa
200 inHg	677,277.8 Pa
500 inHg	1,693,194.5 Pa
1,000 inHg	3,386,389 Pa
5,000 inHg	16,931,945 Pa

Tips & common mistakes

Quick tips

1 inHg ≈ 3386 Pa ≈ 33.86 mbar.
29.92 inHg = 1013.25 mbar = 1 atm.
US pilots use inHg; European pilots use hPa (mbar).

Avoid these

Confusing inHg with mmHg — factor of 25.4.
Mixing US and European altimeter units on a single flight plan.
Using inHg on scientific papers — prefer Pa.

Frequently asked questions

How many pascals in a inch of mercury?

One inch of mercury equals 3,386.39 pascals.

How do I convert inches of mercury to pascals?

Multiply the inch of mercury value by 3,386.39 to get the equivalent in pascals.

What is 100 inches of mercury in pascals?

100 inches of mercury equals 338,638.9 pascals.

Is a inch of mercury bigger than a pascal?

Yes. 1 inch of mercury equals 3,386.39 pascals, so one inch of mercury is larger.

How to convert inches of mercury to pascals without a calculator?

Multiply by 3,386.39 for a quick estimate; use a calculator for precise results.

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