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Pressure
MmHg to Bar
Convert mmHg (mmHg) to bar (bar). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 mmHg = 0.001333 bar
MmHg to Bar Conversion Table
Common values, ready to copy:
| mmHg | bar |
|---|---|
| 1 mmHg | 0.001333 bar |
| 2 mmHg | 0.002666 bar |
| 5 mmHg | 0.006666 bar |
| 10 mmHg | 0.013332 bar |
| 25 mmHg | 0.03333 bar |
| 50 mmHg | 0.066661 bar |
| 100 mmHg | 0.133322 bar |
| 1,000 mmHg | 1.3332 bar |
Formula
bar = mmHg × 0.00133322
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
About MmHg and Bar
MmHg (mmHg): Millimeters of mercury; the pressure exerted by a column of mercury that height; a torr is essentially identical (1 mmHg ≈ 1 torr to within 1 part in 7 million). Common uses: Blood pressure (systolic over diastolic, in mmHg), vacuum systems, barometric pressure in some medical and scientific contexts.
Bar (bar): Defined as exactly 100,000 pascals, or roughly atmospheric pressure at sea level; the name comes from the Greek baros meaning weight. Common uses: European weather reports, tire pressure in some countries (and motorcycles globally), gas cylinder pressures, and brewery/winery pressures.
How the conversion works
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
The exact relationship is bar = mmHg × 0.00133322, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between mmHg and bar comes up wherever pressure measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.