Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mmHg | 1.93367e-05 psi | |
| 0.01 mmHg | 0.000193367 psi | |
| 0.1 mmHg | 0.00193367 psi | |
| 1 mmHg | 0.0193367 psi | |
| 5 mmHg | 0.0966836 psi | |
| 10 mmHg | 0.193367 psi | |
| 50 mmHg | 0.966836 psi | |
| 100 mmHg | 1.93367 psi | |
| 1000 mmHg | 19.3367 psi |
Formula: PSI = mmHg × 0.01934
Multiply any mmhg value by 0.01934 to get psi.
Reverse: mmHg = PSI × 51.72
Common mmhg values — factor: 1 mmHg = 0.01934 psi
| mmHg (mmHg) | PSI (psi) | Context |
|---|---|---|
| 1 mmHg | 0.01934 psi | Very low / ophthalmic |
| 5 mmHg | 0.09668 psi | Low IOP |
| 10 mmHg | 0.1934 psi | Diastolic minimum |
| 20 mmHg | 0.3867 psi | Low BP diastolic |
| 40 mmHg | 0.7735 psi | Low BP range |
| 60 mmHg | 1.16 psi | Hypotensive |
| 80 mmHg | 1.547 psi | Normal diastolic |
| 100 mmHg | 1.934 psi | Elevated diastolic |
| 120 mmHg | 2.32 psi | Normal systolic |
| 200 mmHg | 3.867 psi | High BP |
| 300 mmHg | 5.801 psi | Hypertensive crisis |
| 760 mmHg | 14.7 psi | 1 atm |
| 1,000 mmHg | 19.34 psi | Above atm |
| 2,000 mmHg | 38.67 psi | ~2.6 atm |
| 1e+04 mmHg | 193.4 psi | ~13 atm |
1 mmHg = 0.01934 psi. Memorize for instant estimates.
Use 0.0193 as a quick mental multiplier.
Multiply result by 51.72 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.
PSI (pounds per square inch) is the primary pressure unit in the United States, UK, and other countries using Imperial measures. It equals the force of one pound-force applied over one square inch of area (6,894.76 Pa).
PSI is used for tire pressure (car: 30–35 psi, truck: 80–120 psi), blood pressure measurement in the US, boiler pressure ratings, and hydraulic system specifications in American engineering.
Interesting fact: The deepest ocean dive by a human (Victor Vescovo, 2019, 10,928 m) would have experienced about 15,900 psi of external pressure on the submersible hull.
Converting mmhg to psi 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 = 0.09668 psi and 10 mmHg = 0.1934 psi. For the reverse: 1 psi = 51.72 mmHg. The exact factor is 1 mmHg = 0.01934 psi.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.