Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 mmHg | 0.133322 Pa | |
| 0.01 mmHg | 1.33322 Pa | |
| 0.1 mmHg | 13.3322 Pa | |
| 1 mmHg | 133.322 Pa | |
| 5 mmHg | 666.61 Pa | |
| 10 mmHg | 1333.22 Pa | |
| 50 mmHg | 6666.1 Pa | |
| 100 mmHg | 13332.2 Pa | |
| 1000 mmHg | 133322 Pa |
Formula: Pascal = mmHg × 133.3
Multiply any mmhg value by 133.3 to get pascal.
Reverse: mmHg = Pascal × 0.007501
Common mmhg values — factor: 1 mmHg = 133.3 Pa
| mmHg (mmHg) | Pascal (Pa) | Context |
|---|---|---|
| 1 mmHg | 133.3 Pa | Very low / ophthalmic |
| 5 mmHg | 666.6 Pa | Low IOP |
| 10 mmHg | 1,333 Pa | Diastolic minimum |
| 20 mmHg | 2,666 Pa | Low BP diastolic |
| 40 mmHg | 5,333 Pa | Low BP range |
| 60 mmHg | 7,999 Pa | Hypotensive |
| 80 mmHg | 1.067e+04 Pa | Normal diastolic |
| 100 mmHg | 1.333e+04 Pa | Elevated diastolic |
| 120 mmHg | 1.6e+04 Pa | Normal systolic |
| 200 mmHg | 2.666e+04 Pa | High BP |
| 300 mmHg | 4e+04 Pa | Hypertensive crisis |
| 760 mmHg | 101,300 Pa | 1 atm |
| 1,000 mmHg | 133,300 Pa | Above atm |
| 2,000 mmHg | 266,600 Pa | ~2.6 atm |
| 1e+04 mmHg | 1,333,000 Pa | ~13 atm |
1 mmHg = 133.3 Pa. Memorize for instant estimates.
Use 133.3 as a quick mental multiplier.
Multiply result by 0.007501 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 pascal (Pa) is the SI derived unit of pressure, defined as one newton per square meter. It was named after Blaise Pascal, the 17th-century French mathematician and physicist who studied fluid pressure. The unit was officially adopted by the International System of Units in 1971.
Pascals are used in meteorology (atmospheric pressure ~101,325 Pa), materials science (Young's modulus in GPa), and fluid mechanics. The pascal is very small — standard atmospheric pressure equals 101,325 Pa.
Interesting fact: Blaise Pascal demonstrated in 1648 that atmospheric pressure decreases with altitude by carrying a barometer up the Puy de Dôme mountain, confirming Torricelli's theory of atmospheric pressure.
Converting mmhg to pascal 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 = 666.6 Pa and 10 mmHg = 1333 Pa. For the reverse: 1 Pa = 0.007501 mmHg. The exact factor is 1 mmHg = 133.3 Pa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.