1 mmHg = 133.322 Pa (millimeter of mercury → pascal)
1 mmHg = 133.322 Pa
1 millimeter of mercury equals 133.322 pascals. To convert millimeters of mercury to pascals, multiply the millimeter of mercury value by 133.322. For quick reference: 1 mmHg = 133.322 Pa, 5 mmHg = 666.612 Pa, 10 mmHg = 1333.22 Pa, 100 mmHg = 13332.2 Pa.
Pascals = Millimeters of mercury × 133.322Millimetres of mercury to pascals multiplies by 133.322 (1 mmHg = 133.322387415 Pa). A 120/80 mmHg blood pressure is 15,999/10,666 Pa; the 760 mmHg reference atmosphere is about 101,325 Pa. Use this to bring clinical or barometric mercury-column readings into SI form for modelling or sensor design. Blood-pressure values are gauge figures — measured relative to atmospheric pressure, not absolute — so feeding a converted 120 mmHg into a formula expecting absolute pressure understates the true arterial pressure by an entire atmosphere.
Barometric weather stations built to log data in raw SI units convert incoming millimetres-of-mercury readings from legacy analogue barometers into pascals before storage. A 760 mmHg standard atmosphere becomes 101,325 Pa; a storm-driven pressure drop to 740 mmHg is 98,678 Pa. Because many historical weather archives were recorded exclusively in mmHg, digitising decades of paper barograph charts into a modern pascal-based database requires this exact 133.322 Pa-per-mmHg factor, not the older approximate value of 133.3 still found in some textbooks.
Start with your value in millimeters of mercury.
Multiply the millimeter of mercury value by 133.322. This is the exact conversion factor from millimeters of mercury to pascals.
The product is your value in pascals. For example, 5 mmHg × 133.322 = 666.612 Pa.
The exact factor from millimeters of mercury to pascals is 133.322.
Pascals = Millimeters of mercury × 133.322
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Millimeters of mercury (mmHg) | Pascals (Pa) |
|---|---|
| 0.001 mmHg | 0.13332 Pa |
| 0.01 mmHg | 1.3332 Pa |
| 0.1 mmHg | 13.332 Pa |
| 0.5 mmHg | 66.661 Pa |
| 1 mmHg | 133.32 Pa |
| 1.5 mmHg | 199.98 Pa |
| 2 mmHg | 266.64 Pa |
| 2.5 mmHg | 333.31 Pa |
| 3 mmHg | 399.97 Pa |
| 4 mmHg | 533.29 Pa |
| 5 mmHg | 666.61 Pa |
| 6 mmHg | 799.93 Pa |
| 7 mmHg | 933.26 Pa |
| 8 mmHg | 1066.6 Pa |
| 9 mmHg | 1199.9 Pa |
| 10 mmHg | 1333.2 Pa |
| 14 mmHg | 1866.5 Pa |
| 15 mmHg | 1999.8 Pa |
| 20 mmHg | 2666.4 Pa |
| 25 mmHg | 3333.1 Pa |
| 30 mmHg | 3999.7 Pa |
| 32 mmHg | 4266.3 Pa |
| 35 mmHg | 4666.3 Pa |
| 40 mmHg | 5332.9 Pa |
| 50 mmHg | 6666.1 Pa |
| 60 mmHg | 7999.3 Pa |
| 75 mmHg | 9999.2 Pa |
| 80 mmHg | 10666 Pa |
| 100 mmHg | 13332 Pa |
| 101.325 mmHg | 13509 Pa |
| 150 mmHg | 19998 Pa |
| 200 mmHg | 26664 Pa |
| 250 mmHg | 33331 Pa |
| 300 mmHg | 39997 Pa |
| 400 mmHg | 53329 Pa |
| 500 mmHg | 66661 Pa |
| 760 mmHg | 101325 Pa |
| 1000 mmHg | 133322 Pa |
| 1013.25 mmHg | 135089 Pa |
| 2000 mmHg | 266645 Pa |
| 5000 mmHg | 666612 Pa |
| 10000 mmHg | 1333224 Pa |
| 14.7 mmHg | 1959.8 Pa |
| 50000 mmHg | 6666119 Pa |
| 100000 mmHg | 13332239 Pa |
| 101325 mmHg | 13508891 Pa |
| 200000 mmHg | 26664477 Pa |
| 500000 mmHg | 66661194 Pa |
| 1000000 mmHg | 133322387 Pa |
| 10000000 mmHg | 1333223874 Pa |
Normal blood pressure is around 120/80 mmHg. Atmospheric pressure at sea level is roughly 760 mmHg. In pascals, that gives you: 1 mmHg = 133.322 Pa, 10 mmHg = 1333.22 Pa, 100 mmHg = 13332.2 Pa.
The millimeter of mercury (mmHg) equals approximately 133.322 Pa — the pressure exerted by a 1 mm column of mercury under standard gravity. It is the conventional unit for blood pressure worldwide, even in countries that have otherwise gone fully metric.
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square meter. It is the universal unit in physics and engineering documentation. In everyday life pascals are tiny — atmospheric pressure is around 101,000 Pa — so multiples like kPa and MPa dominate practical use.
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