Convert Pascal to Millimetre of mercury
1 pascal = 0.007500616 millimetre of mercury (mmHg). For example, 10 pascal = 0.07500616 millimetre of mercury and 100 pascal = 0.7500616 millimetre of mercury. Type any value below to convert pascal to millimetre of mercury both ways — it runs entirely in your browser.
Quick answer: Pascal to Millimetre of mercury
1 Pascal = 0.007500616 Millimetre of mercury (Pa → mmHg). To convert pascal to millimetre of mercury, multiply by 0.007500616. To convert millimetre of mercury to pascal, multiply by 133.3224. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common pascal-to-millimetre of mercury questions.
How to convert Pascal to Millimetre of mercury
To convert pascal to millimetre of mercury, multiply the number of pascal by the conversion factor 0.007500616, because 1 Pa = 0.007500616 mmHg. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 mmHg = 133.3224 Pa, so you divide by 0.007500616 (or multiply by 133.3224) to turn millimetre of mercury back into pascal.
mmHg = Pa × 0.007500616 ·
Pa = mmHg × 133.3224
- Write down the value you want to convert, in pascal.
- Multiply it by 0.007500616.
- The result is the same area/length/quantity expressed in millimetre of mercury.
Pascal to Millimetre of mercury — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pascal is 0.03750308 millimetre of mercury because 5 Pa × 0.007500616 = 0.03750308 mmHg.
| Pascal | Calculation | Millimetre of mercury |
|---|---|---|
| 1 Pa | 1 Pa × 0.007500616 = 0.007500616 mmHg | 0.007500616 mmHg |
| 2 Pa | 2 Pa × 0.007500616 = 0.01500123 mmHg | 0.01500123 mmHg |
| 3 Pa | 3 Pa × 0.007500616 = 0.02250185 mmHg | 0.02250185 mmHg |
| 5 Pa | 5 Pa × 0.007500616 = 0.03750308 mmHg | 0.03750308 mmHg |
| 7 Pa | 7 Pa × 0.007500616 = 0.05250431 mmHg | 0.05250431 mmHg |
| 10 Pa | 10 Pa × 0.007500616 = 0.07500616 mmHg | 0.07500616 mmHg |
| 12 Pa | 12 Pa × 0.007500616 = 0.09000739 mmHg | 0.09000739 mmHg |
| 15 Pa | 15 Pa × 0.007500616 = 0.1125092 mmHg | 0.1125092 mmHg |
| 20 Pa | 20 Pa × 0.007500616 = 0.1500123 mmHg | 0.1500123 mmHg |
| 25 Pa | 25 Pa × 0.007500616 = 0.1875154 mmHg | 0.1875154 mmHg |
| 50 Pa | 50 Pa × 0.007500616 = 0.3750308 mmHg | 0.3750308 mmHg |
| 100 Pa | 100 Pa × 0.007500616 = 0.7500616 mmHg | 0.7500616 mmHg |
Common Pascal to Millimetre of mercury conversions
These are the pascal-to-millimetre of mercury values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 pascal = 0.007500616 millimetre of mercury
- 2 pascal = 0.01500123 millimetre of mercury
- 2.5 pascal = 0.01875154 millimetre of mercury
- 3 pascal = 0.02250185 millimetre of mercury
- 4 pascal = 0.03000246 millimetre of mercury
- 5 pascal = 0.03750308 millimetre of mercury
- 6 pascal = 0.04500369 millimetre of mercury
- 7 pascal = 0.05250431 millimetre of mercury
- 8 pascal = 0.06000493 millimetre of mercury
- 9 pascal = 0.06750554 millimetre of mercury
- 10 pascal = 0.07500616 millimetre of mercury
- 12 pascal = 0.09000739 millimetre of mercury
- 15 pascal = 0.1125092 millimetre of mercury
- 20 pascal = 0.1500123 millimetre of mercury
- 25 pascal = 0.1875154 millimetre of mercury
- 30 pascal = 0.2250185 millimetre of mercury
- 50 pascal = 0.3750308 millimetre of mercury
- 75 pascal = 0.5625462 millimetre of mercury
- 100 pascal = 0.7500616 millimetre of mercury
- 200 pascal = 1.500123 millimetre of mercury
- 500 pascal = 3.750308 millimetre of mercury
- 1000 pascal = 7.500616 millimetre of mercury
Pascal to Millimetre of mercury conversion chart (both directions)
The chart below converts pascal to millimetre of mercury and millimetre of mercury to pascal side by side, so it works whichever way you need. 1 pascal = 0.007500616 millimetre of mercury, and 1 millimetre of mercury = 133.3224 pascal.
| Pascal → Millimetre of mercury | Millimetre of mercury → Pascal |
|---|---|
| 0.25 Pa = 0.001875154 mmHg | 0.25 mmHg = 33.3306 Pa |
| 0.5 Pa = 0.003750308 mmHg | 0.5 mmHg = 66.66119 Pa |
| 1 Pa = 0.007500616 mmHg | 1 mmHg = 133.3224 Pa |
| 2 Pa = 0.01500123 mmHg | 2 mmHg = 266.6448 Pa |
| 3 Pa = 0.02250185 mmHg | 3 mmHg = 399.9672 Pa |
| 4 Pa = 0.03000246 mmHg | 4 mmHg = 533.2895 Pa |
| 5 Pa = 0.03750308 mmHg | 5 mmHg = 666.6119 Pa |
| 6 Pa = 0.04500369 mmHg | 6 mmHg = 799.9343 Pa |
| 7 Pa = 0.05250431 mmHg | 7 mmHg = 933.2567 Pa |
| 8 Pa = 0.06000493 mmHg | 8 mmHg = 1,066.579 Pa |
| 9 Pa = 0.06750554 mmHg | 9 mmHg = 1,199.901 Pa |
| 10 Pa = 0.07500616 mmHg | 10 mmHg = 1,333.224 Pa |
| 12 Pa = 0.09000739 mmHg | 12 mmHg = 1,599.869 Pa |
| 15 Pa = 0.1125092 mmHg | 15 mmHg = 1,999.836 Pa |
| 20 Pa = 0.1500123 mmHg | 20 mmHg = 2,666.448 Pa |
| 25 Pa = 0.1875154 mmHg | 25 mmHg = 3,333.06 Pa |
| 30 Pa = 0.2250185 mmHg | 30 mmHg = 3,999.672 Pa |
| 40 Pa = 0.3000246 mmHg | 40 mmHg = 5,332.895 Pa |
| 50 Pa = 0.3750308 mmHg | 50 mmHg = 6,666.119 Pa |
| 75 Pa = 0.5625462 mmHg | 75 mmHg = 9,999.179 Pa |
| 100 Pa = 0.7500616 mmHg | 100 mmHg = 13,332.24 Pa |
| 150 Pa = 1.125092 mmHg | 150 mmHg = 19,998.36 Pa |
| 200 Pa = 1.500123 mmHg | 200 mmHg = 26,664.48 Pa |
| 250 Pa = 1.875154 mmHg | 250 mmHg = 33,330.6 Pa |
| 500 Pa = 3.750308 mmHg | 500 mmHg = 66,661.19 Pa |
| 1000 Pa = 7.500616 mmHg | 1000 mmHg = 133,322.4 Pa |
Pascal vs Millimetre of mercury: which is bigger?
A millimetre of mercury is the larger unit: one millimetre of mercury equals 133.3224 pascals. Put another way, you need 133.3224 pascals to make a single millimetre of mercury.
What is a Pascal? History, origin and usage
The pascal is named after Blaise Pascal, who in 1648 had his brother-in-law carry a mercury barometer up the Puy de Dôme in central France and watch the mercury column fall as he climbed. That experiment showed air has weight and that the pressure it exerts drops with height. The unit itself is much younger: the name was adopted by the General Conference on Weights and Measures in 1971, replacing the older habit of writing pressures as "newtons per square metre".
The pascal is the SI unit of pressure and the base every other unit on this page is defined against. On its own it is awkwardly small for daily life — a sheet of paper resting on a table presses down with only a few pascals — so real-world figures are almost always given with a prefix: hectopascals for weather, kilopascals for tyres and gas, megapascals for concrete and hydraulics.
One pascal is one newton spread over one square metre, which is about the pressure of a five-rupee coin lying flat on a table. Because pressure is force divided by area, the same push concentrated into a smaller area gives a much higher pressure — which is why a drawing pin goes into a wall and your thumb does not.
What is a Millimetre of mercury? History, origin and usage
Measuring pressure by the height of a mercury column dates to Torricelli in 1643 and became the standard laboratory method for three centuries. Mercury was chosen because it is dense enough to keep the tube a manageable length — a water barometer measuring the same pressure would need to be over ten metres tall. The modern unit no longer depends on real mercury: it is fixed at exactly 133.322387415 pascals, the value a millimetre of mercury would give at a conventional density of 13,595.1 kg per cubic metre under standard gravity.
Millimetres of mercury are the universal unit of blood pressure — a reading of "120 over 80" means 120 mmHg when the heart contracts and 80 mmHg between beats. They are also used for eye pressure, cerebrospinal fluid pressure and some vacuum work.
Mercury sphygmomanometers are being retired worldwide because of the toxicity of mercury, yet the unit has outlived the instrument: digital monitors with no mercury in them still report in mmHg, because a century of medical guidance is written in it.
Convert 1 Pascal to other units
It can help to see a pascal next to the other units it is commonly compared with. One pascal (Pa) is equal to:
| 1 Pascal equals | Unit |
|---|---|
| 0.01 hPa | Hectopascal |
| 0.001 kPa | Kilopascal |
| 0.000001 MPa | Megapascal |
| 0.01 mbar | Millibar |
| 0.00001 bar | Bar |
| 0.000009869233 atm | Standard atmosphere |
| 0.007500617 Torr | Torr |
| 0.007500616 mmHg | Millimetre of mercury |
| 0.0002952998 inHg | Inch of mercury |
| 0.1019716 mmH₂O | Millimetre of water |
| 0.004014631 inH₂O | Inch of water |
| 0.0001450377 psi | Pound per square inch |
| 0.00001019716 kgf/cm² | Kilogram-force per square centimetre |
Convert 1 Millimetre of mercury to other units
One millimetre of mercury (mmHg) is equal to:
| 1 Millimetre of mercury equals | Unit |
|---|---|
| 133.3224 Pa | Pascal |
| 1.333224 hPa | Hectopascal |
| 0.1333224 kPa | Kilopascal |
| 0.0001333224 MPa | Megapascal |
| 1.333224 mbar | Millibar |
| 0.001333224 bar | Bar |
| 0.00131579 atm | Standard atmosphere |
| 1 Torr | Torr |
| 0.03937008 inHg | Inch of mercury |
| 13.5951 mmH₂O | Millimetre of water |
| 0.5352402 inH₂O | Inch of water |
| 0.01933678 psi | Pound per square inch |
| 0.00135951 kgf/cm² | Kilogram-force per square centimetre |
Tips for converting Pascal to Millimetre of mercury
- To go from pascal to millimetre of mercury, multiply by 0.007500616; to go back, divide by 0.007500616 (or multiply by 133.3224).
- For a quick mental estimate, remember that 1 pascal ≈ 0.007500616 millimetre of mercury, so 10 pascal ≈ 0.07500616 millimetre of mercury.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Pascal to Millimetre of mercury converter
Type a number into the Pascal field and the equivalent in Millimetre of mercury appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Millimetre of mercury field to convert the other way (millimetre of mercury to pascal). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 Pa = 0.007500616 mmHg), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for pascal-to-millimetre of mercury conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
- NIST — Definitions of the SI base units — the US National Institute of Standards and Technology reference for the SI base units, used here as an independent cross-check on the base-unit definition.
Pressure factors here come from fixed definitions, anchored to the pascal: a bar is exactly 100,000 Pa, one atmosphere is exactly 101,325 Pa, a torr is exactly a 760th of an atmosphere, and psi is built from the exact pound and the exact inch. Two of them — psi and the torr — work out to decimals that repeat forever, so where a number is shown rounded it is marked, not quietly trimmed.
Frequently asked questions
- How many millimetre of mercury are in 1 pascal?
- 1 pascal = 0.007500616 millimetre of mercury (mmHg). To convert any number of pascal to millimetre of mercury, multiply by 0.007500616.
- How do I convert pascal to millimetre of mercury?
- Multiply the number of pascal by 0.007500616. For example, 10 pascal = 10 × 0.007500616 = 0.07500616 millimetre of mercury, and 25 pascal = 0.1875154 millimetre of mercury.
- How many pascal are in 1 millimetre of mercury?
- 1 millimetre of mercury = 133.3224 pascal. So to convert millimetre of mercury back to pascal, multiply by 133.3224.
- What is the formula to convert pascal to millimetre of mercury?
- millimetre of mercury = pascal × 0.007500616. The reverse formula is pascal = millimetre of mercury × 133.3224.
- How much is 100 pascal in millimetre of mercury?
- 100 pascal = 0.7500616 millimetre of mercury. (And 1000 pascal = 7.500616 millimetre of mercury.)
- Which is bigger, a pascal or a millimetre of mercury?
- A millimetre of mercury is larger: 1 millimetre of mercury = 133.3224 pascal.
- Is this pascal to millimetre of mercury converter accurate?
- Yes — every value is computed from the exact 0.007500616 mmHg per Pa factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert millimetre of mercury to pascal too?
- Yes. The converter works both ways — enter a value in either field. 1 millimetre of mercury = 133.3224 pascal.