Millimeter of mercury (mmHg)
Conventional millimeter of mercury: pressure of a 1 mm column of mercury of density 13 595.1 kg/m³ under standard gravity (133.322387415 pascals).
What is a millimeter of mercury?
- Symbol
- mmHg
- Quantity
- Pressure
- Unit system
- other
- Definition
- Conventional millimeter of mercury: pressure of a 1 mm column of mercury of density 13 595.1 kg/m³ under standard gravity (133.322387415 pascals).
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used for blood pressure readings and in some medical and laboratory equipment.
Millimeter of mercury in other pressure units
- 1 mmHg = 133.322387415 PaPascal
- 1 mmHg = 1.33322387415 hPaHectopascal
- 1 mmHg = 0.133322387415 kPaMillimeter of mercury to Kilopascal converter
- 1 mmHg = 0.000133322387415 MPaMegapascal
- 1 mmHg = 1.33322387415e-7 GPaGigapascal
- 1 mmHg = 1.33322387415 mbarMillibar
- 1 mmHg = 0.00133322387415 barBar
- 1 mmHg ≈ 0.001315789661 atmStandard atmosphere
- 1 mmHg = 0.00135951 atTechnical atmosphere
- 1 mmHg ≈ 1.000000142 TorrTorr
- 1 mmHg ≈ 0.01933677746 psiPound-force per square inch
- 1 mmHg ≈ 0.00001933677746 ksiKilopound-force per square inch
Millimeter of mercury quick reference
| Millimeter of mercury | Kilopascal | Bar | Pound-force per square inch |
|---|---|---|---|
| 1 mmHg | = 0.133322387415 kPa | = 0.00133322387415 bar | ≈ 0.01933677746 psi |
| 10 mmHg | = 1.33322387415 kPa | = 0.0133322387415 bar | ≈ 0.1933677746 psi |
| 100 mmHg | = 13.3322387415 kPa | = 0.133322387415 bar | ≈ 1.933677746 psi |
| 1000 mmHg | = 133.322387415 kPa | = 1.33322387415 bar | ≈ 19.33677746 psi |
Where the millimeter of mercury fits
The next smaller pressure unit is the torr (Torr). 1 mmHg ≈ 1.000000142 Torr, and 1 Torr ≈ 0.9999998575 mmHg.
The next larger pressure unit is the kilopascal (kPa). 1 mmHg = 0.133322387415 kPa, and 1 kPa ≈ 7.500615758 mmHg.
Frequently asked questions
- How many kilopascals are in one millimeter of mercury?
- One millimeter of mercury = 0.133322387415 kPa (kilopascals).
- How many bars are in one millimeter of mercury?
- One millimeter of mercury = 0.00133322387415 bar (bars).
- How many psi are in one millimeter of mercury?
- One millimeter of mercury ≈ 0.01933677746 psi (psi).