Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mmHg | 1.33322e-06 bar | |
| 0.01 mmHg | 1.33322e-05 bar | |
| 0.1 mmHg | 0.000133322 bar | |
| 1 mmHg | 0.00133322 bar | |
| 5 mmHg | 0.0066661 bar | |
| 10 mmHg | 0.0133322 bar | |
| 50 mmHg | 0.066661 bar | |
| 100 mmHg | 0.133322 bar | |
| 1000 mmHg | 1.33322 bar |
Formula: Bar = mmHg × 0.001333
Multiply any mmhg value by 0.001333 to get bar.
Reverse: mmHg = Bar × 750.1
Common mmhg values — factor: 1 mmHg = 0.001333 bar
| mmHg (mmHg) | Bar (bar) | Context |
|---|---|---|
| 1 mmHg | 0.001333 bar | Very low / ophthalmic |
| 5 mmHg | 0.006666 bar | Low IOP |
| 10 mmHg | 0.01333 bar | Diastolic minimum |
| 20 mmHg | 0.02666 bar | Low BP diastolic |
| 40 mmHg | 0.05333 bar | Low BP range |
| 60 mmHg | 0.07999 bar | Hypotensive |
| 80 mmHg | 0.1067 bar | Normal diastolic |
| 100 mmHg | 0.1333 bar | Elevated diastolic |
| 120 mmHg | 0.16 bar | Normal systolic |
| 200 mmHg | 0.2666 bar | High BP |
| 300 mmHg | 0.4 bar | Hypertensive crisis |
| 760 mmHg | 1.013 bar | 1 atm |
| 1,000 mmHg | 1.333 bar | Above atm |
| 2,000 mmHg | 2.666 bar | ~2.6 atm |
| 1e+04 mmHg | 13.33 bar | ~13 atm |
1 mmHg = 0.001333 bar. Memorize for instant estimates.
Use 0.0013 as a quick mental multiplier.
Multiply result by 750.1 to recover the original mmHg value.
Measures and interprets blood pressure in mmHg — the global clinical standard.
Measures intraocular pressure in mmHg to screen for and manage glaucoma.
Monitors arterial blood pressure and ventilator settings in mmHg.
Specifies rough vacuum ranges in torr/mmHg for laboratory systems.
Measures pulmonary artery pressure and oxygen partial pressure in mmHg.
Quantifies gas partial pressures (O₂, CO₂) in blood and tissues in mmHg.
Millimeters of mercury (mmHg) is the traditional medical pressure unit, defined as the pressure exerted by a 1 mm column of mercury at 0°C under standard gravity. It equals 133.322 Pa and is numerically identical to the torr.
Blood pressure is universally measured in mmHg worldwide: normal blood pressure is about 120/80 mmHg. Intraocular pressure (glaucoma screening) is measured in mmHg. Gas partial pressures in physiology are quoted in mmHg.
Interesting fact: The sphygmomanometer (blood pressure cuff) still uses mmHg more than 130 years after its invention, making mmHg one of the most clinically important pressure units despite not being an SI unit.
The bar is a metric unit of pressure equal to exactly 100,000 pascals — very close to standard atmospheric pressure (1 atm = 1.01325 bar). It was introduced in 1909 and is widely used in Europe for weather forecasting, diving, and industrial applications.
Scuba diving cylinders are filled to 200–300 bar. Automotive tire pressure gauges often display in bar across Europe. Industrial compressors and hydraulic systems are commonly rated in bar.
Interesting fact: The millibar (mbar = hPa) is the standard unit for atmospheric pressure in meteorology worldwide. Standard sea-level atmospheric pressure is 1013.25 mbar.
Converting mmhg to bar is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 mmHg = 0.006666 bar and 10 mmHg = 0.01333 bar. For the reverse: 1 bar = 750.1 mmHg. The exact factor is 1 mmHg = 0.001333 bar.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.