Convert inches of mercury to bars

1 inHg=0.03386bar

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

You have

Equals

0.033864

Conversion formula

Forward

bars = inches of mercury × 0.03386

Reverse

inches of mercury = bars × 29.53

Example: 10 inHg × 0.03386 = 0.3386 bar.

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 →

Bar

bar

The bar equals 100,000 pascals — slightly less than one atmosphere (1.01325 bar). It is a convenient unit for everyday pressures: tyre pressures, diving depth, weather fronts. Common in European engineering.

Real-world: Car tyre: 2.0–2.5 bar. SCUBA at 10 m depth: 2 bar absolute. Fire hose: 5–7 bar.

Read full bar reference →

Inch of Mercury to Bar conversion table

Common inches of mercury to bars values for quick reference.

Inch of Mercury (inHg)	Bar (bar)
1 inHg	0.03386 bar
5 inHg	0.1693 bar
10 inHg	0.3386 bar
25 inHg	0.8466 bar
50 inHg	1.69319 bar
100 inHg	3.38639 bar
200 inHg	6.77278 bar
500 inHg	16.9319 bar
1,000 inHg	33.8639 bar
5,000 inHg	169.319 bar

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 bars in a inch of mercury?

One inch of mercury equals 0.03386 bars.

How do I convert inches of mercury to bars?

Multiply the inch of mercury value by 0.03386 to get the equivalent in bars.

What is 100 inches of mercury in bars?

100 inches of mercury equals 3.38639 bars.

Is a inch of mercury bigger than a bar?

No. 1 inch of mercury equals 0.03386 bars, so one inch of mercury is smaller.

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

Multiply by 0.03 for a quick estimate; use a calculator for precise results.

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Convert inches of mercury to bars

🧮 Conversion formula