How many bars are in 1 mmhg?

1 mmhg equals 0.0013332239 bars, using the exact defined conversion factor rather than an estimate.

How do I convert mmhg to bar?

Multiply the mmhg value by 0.001333223874. The converter above does this instantly to whatever precision you set.

How do I convert bar back to mmhg?

Use the reverse factor: 1 bar equals 750.0615758 mmhgs. You can also use the swap control in the converter above to flip the direction instantly.

mmHg (mmHg) is a unit of pressure.

Is the mmhg to bar conversion exact?

Yes. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

mmHgs to Bars Converter

Q: What is a bar?

Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.

About Converting mmHgs to Bars

mmHg and Bar both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Millimeters of mercury at standard gravity, and a bar is exactly 100,000 pascals.

Formula

bars = mmhgs × 0.00133322387415

This factor comes from each unit's defined relationship to the category's base unit: 1 mmhg equals 133.322387415 base units, and 1 bar equals 100000 base units, so dividing one by the other gives the direct mmhg-to-bar factor of 0.00133322387415.

Simple example

1 mmHg × 0.001333223874 = 0.0013332239 bar

1 mmhg = 0.0013332239 bars.

Real-world example

35 mmHg × 0.001333223874 = 0.0466628356 bar

35 mmhgs = 0.0466628356 bars.

Conversion table

mmHg (mmHg)	Bar (bar)
1 mmHg	0.0013332239 bar
5 mmHg	0.0066661194 bar
10 mmHg	0.0133322387 bar
25 mmHg	0.0333305969 bar
50 mmHg	0.0666611937 bar
100 mmHg	0.1333223874 bar

Reverse conversion: Bar to mmHg

0.0013332239 bar × 750.0615758 = 1.000000019 mmHg

0.0013332239 bars = 1.000000019 mmhgs.

mmhgs = bars × 750.061575846

For a page dedicated to this direction, see Bar to mmHg.

Understanding the mmHg (mmHg)

Millimeters of mercury at standard gravity.

Understanding the Bar

Bar (bar) measures pressure. A bar is defined as exactly 100,000 pascals, close to (but distinct from) one standard atmosphere (101,325 Pa). It is classified as a Non-SI metric unit accepted for use with SI.

Where it's used: Widely used in Europe and most of the world for tire pressure, weather, and industrial pressure

Uses of the Bar today

Tire pressure specifications outside the US
Meteorology (weather maps commonly use millibars, hPa)
Industrial and hydraulic pressure ratings in metric-system countries

History of the Bar

The bar was proposed by Norwegian meteorologist Vilhelm Bjerknes around 1906 as a convenient round pressure unit close to atmospheric pressure, derived from the CGS unit system (one bar equals one million dynes per square centimeter).

Though not an SI unit, the bar remains in wide practical use, particularly in meteorology (as the millibar, now more often written as the equivalent hectopascal) and in tire and hydraulic pressure specifications across most of the world.

Historical origin. Bar was not the invention of a single named person; it developed through the process described above.

Bar — sources

BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the bar among accepted non-SI pressure units.

mmHgs to Bars Converter — mmHg to bar

Pressure Converter