Convert bar to millimeters of mercury
Bar (bar) to millimeter of mercury (mmHg). One bar equals 750.06 millimeters of mercury.
Formula
Bar to millimeter of mercury conversion table
| Bar | Millimeters of mercury | Millimeters of mercury | Bar |
|---|---|---|---|
| 1 bar | 750.06 mmHg | 1 mmHg | 0.001333 bar |
| 2 bar | 1500.12 mmHg | 2 mmHg | 0.002666 bar |
| 3 bar | 2250.18 mmHg | 3 mmHg | 0.004 bar |
| 5 bar | 3750.31 mmHg | 5 mmHg | 0.006666 bar |
| 10 bar | 7500.62 mmHg | 10 mmHg | 0.013332 bar |
| 20 bar | 15001.23 mmHg | 20 mmHg | 0.026664 bar |
| 50 bar | 37503.08 mmHg | 50 mmHg | 0.066661 bar |
| 100 bar | 75006.16 mmHg | 100 mmHg | 0.133322 bar |
| 500 bar | 375030.79 mmHg | 500 mmHg | 0.666612 bar |
| 1000 bar | 750061.58 mmHg | 1000 mmHg | 1.3332 bar |
Decimal bar to millimeters of mercury conversion table
The exact decimal amounts people look up most often, worked out with the same factor the converter above uses. Every row is calculated, not rounded off a chart.
| Bar | Millimeters of mercury |
|---|---|
| 0.1 bar | 75.0062 mmHg |
| 0.15 bar | 112.51 mmHg |
| 0.2 bar | 150.01 mmHg |
| 0.25 bar | 187.52 mmHg |
| 0.3 bar | 225.02 mmHg |
| 0.33 bar | 247.52 mmHg |
| 0.35 bar | 262.52 mmHg |
| 0.4 bar | 300.02 mmHg |
| 0.45 bar | 337.53 mmHg |
| 0.5 bar | 375.03 mmHg |
| 0.55 bar | 412.53 mmHg |
| 0.6 bar | 450.04 mmHg |
| 0.65 bar | 487.54 mmHg |
| 0.67 bar | 502.54 mmHg |
| 0.7 bar | 525.04 mmHg |
| 0.75 bar | 562.55 mmHg |
| 0.8 bar | 600.05 mmHg |
| 0.85 bar | 637.55 mmHg |
| 0.9 bar | 675.06 mmHg |
| 0.95 bar | 712.56 mmHg |
| 1 bar | 750.06 mmHg |
| 1.05 bar | 787.56 mmHg |
| 1.1 bar | 825.07 mmHg |
| 1.15 bar | 862.57 mmHg |
| 1.2 bar | 900.07 mmHg |
| 1.25 bar | 937.58 mmHg |
| 1.3 bar | 975.08 mmHg |
| 1.35 bar | 1012.58 mmHg |
| 1.4 bar | 1050.09 mmHg |
| 1.45 bar | 1087.59 mmHg |
| 1.5 bar | 1125.09 mmHg |
| 1.55 bar | 1162.6 mmHg |
| 1.6 bar | 1200.1 mmHg |
| 1.65 bar | 1237.6 mmHg |
| 1.7 bar | 1275.1 mmHg |
| 1.75 bar | 1312.61 mmHg |
| 1.8 bar | 1350.11 mmHg |
| 1.85 bar | 1387.61 mmHg |
| 1.9 bar | 1425.12 mmHg |
| 1.95 bar | 1462.62 mmHg |
| 2 bar | 1500.12 mmHg |
Millimeters of mercury back to bar
The same conversion in reverse, for when you have the answer and need the question.
| Millimeters of mercury | Bar |
|---|---|
| 1 mmHg | 0.001333 bar |
| 10 mmHg | 0.013332 bar |
| 50 mmHg | 0.066661 bar |
| 100 mmHg | 0.133322 bar |
| 120 mmHg | 0.159987 bar |
| 200 mmHg | 0.266645 bar |
| 500 mmHg | 0.666612 bar |
| 750 mmHg | 0.999918 bar |
| 760 mmHg | 1.0133 bar |
| 1000 mmHg | 1.3332 bar |
| 1500 mmHg | 1.9998 bar |
Where the bar to millimeter of mercury factor comes from
- The bar is defined as exactly 100 000 pascals (10⁵ Pa). It is not an SI unit, but it is legally defined against the pascal, which is.
- The conventional millimetre of mercury is defined as exactly 133.322387415 Pa. That figure comes from a 1 mm column of mercury at a density of 13 595.1 kg/m³ under standard gravity of 9.80665 m/s².
- Dividing gives 1 bar = 100 000 ÷ 133.322387415 = 750.0615758 mmHg.
- millimetres of mercury = bar × 750.0615758. So 0.1 bar is 75.01 mmHg and 1.5 bar is 1125.09 mmHg.
Sources
Common mistakes
mmHg and Torr are close but not identical
A Torr is defined as exactly 1/760 of a standard atmosphere, which is 101325 ÷ 760 = 133.3223684 Pa. The conventional mmHg is 133.322387415 Pa. They differ by about one part in seven million, so they are interchangeable for blood pressure or vacuum gauges, but they are not the same definition and should not be treated as one in metrology work.
Gauge pressure versus absolute pressure
Most tyre and boiler gauges read gauge pressure, meaning pressure above the surrounding air. Blood pressure is also gauge. Absolute pressure includes the atmosphere itself, about 1.01325 bar or 760 mmHg at sea level. Converting the number is only half the job: 0.5 bar on a tyre gauge is 1.51 bar absolute, and the unit conversion cannot tell you which one you have.
To convert bar to millimeters of mercury, multiply the number of bar by 750.06. One bar equals 750.06 millimeters of mercury, and one millimeter of mercury equals 0.001333 bar, so the relationship is fixed and exact. As a worked example, 10 bar comes to 7500.62 mmHg. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a pressure conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common bar values already worked out in millimeters of mercury, plus the reverse millimeter of mercury to bar direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many mmHg is 0.1 bar?
0.1 bar is 75.01 mmHg. Multiply bar by 750.0615758, which is how many millimetres of mercury one bar supports.
How many mmHg is 1 bar?
1 bar is 750.06 mmHg. That is slightly less than one standard atmosphere, which is 760 mmHg or 1.01325 bar.
Is mmHg the same as Torr?
Almost. A Torr is exactly 1/760 atmosphere (133.3223684 Pa) and a conventional mmHg is 133.322387415 Pa. The difference is about one part in seven million, so for medical and vacuum work they are treated as equal, but the definitions are distinct.
How many millimeters of mercury are in a bar?
One bar equals 750.06 millimeters of mercury. The ratio is constant, so you can multiply any number of bar by 750.06 to get millimeters of mercury.
What is the formula to convert bar to millimeters of mercury?
Use millimeters of mercury = bar × 750.06. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert millimeters of mercury back to bar?
Go the other way by using one millimeter of mercury equals 0.001333 bar. You can also press the swap button in the converter above to flip the direction in one click.
Is this bar to millimeter of mercury converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.