Convert Bar to Millimeters of Mercury (bar to mmHg)
1 bar equals 750.0615758 millimeters of mercury (mmHg).
1 bar = 750.0615758 mmHg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk bar to millimeter of mercury converter to paste a column from Excel.
How to Convert Bar to Millimeter of Mercury
- 1 bar = 750.0615758 mmHg
- 1 mmHg = 0.001333223874 bar
- Example: convert 0.5 bar to mmHg: 0.5 bar = 0.5 × 750.0615758 mmHg = 375.0307879 mmHg
Reference conditions. mmHg: Conventional mercury column: ρ = 13 595.1 kg/m³ and gₙ = 9.80665 m/s² (≈ mercury at 0 °C / 32 °F).
Formula
mmHg = bar × 750.0615758457
Derivation from SI units:
- 1 bar = 10⁵ Pa (exact, by definition)
- 1 mmHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.001 m = 133.322387415 Pa
- 1 bar = 100000 Pa ÷ 133.322387415 Pa per mmHg = 750.0615758457 mmHg
Both units are defined exactly, so the factor is exact. Bar definition: bar; Millimeter of Mercury definition: millimeter of mercury.
Worked examples
- 1 bar is 750.0615758 mmHg.
1 bar × 750.0615758 = 750.0615758 mmHg - A 0.5 bar vacuum level is 375.0307879 mmHg.
0.5 bar × 750.0615758 = 375.0307879 mmHg
Bar to Millimeter of Mercury conversion table
| Bar | Millimeters of Mercury (mmHg) |
|---|---|
| 0.01 bar | 7.500615758 mmHg |
| 0.05 bar | 37.50307879 mmHg |
| 0.1 bar | 75.00615758 mmHg |
| 0.25 bar | 187.515394 mmHg |
| 0.5 bar | 375.0307879 mmHg |
| 1 bar | 750.0615758 mmHg |
| 1.01325 bar | 759.9998917 mmHg |
| 1.5 bar | 1125.092364 mmHg |
| 2 bar | 1500.123152 mmHg |
| 2.5 bar | 1875.15394 mmHg |
| 3 bar | 2250.184728 mmHg |
| 4 bar | 3000.246303 mmHg |
| 5 bar | 3750.307879 mmHg |
| 6 bar | 4500.369455 mmHg |
| 7 bar | 5250.431031 mmHg |
| 8 bar | 6000.492607 mmHg |
| 10 bar | 7500.615758 mmHg |
| 12 bar | 9000.73891 mmHg |
| 16 bar | 12000.98521 mmHg |
| 20 bar | 15001.23152 mmHg |
| 25 bar | 18751.5394 mmHg |
| 40 bar | 30002.46303 mmHg |
| 100 bar | 75006.15758 mmHg |
| 200 bar | 150012.3152 mmHg |
| 300 bar | 225018.4728 mmHg |
Where it's used
Pressures in bar are converted to millimetres of mercury for vacuum, medical and laboratory instruments that read in mmHg. 1 bar is about 750.06 mmHg.
Bar to other pressure units
| Conversion | 1 bar equals |
|---|---|
| bar to pascal | 100000 Pa |
| bar to kilopascal | 100 kPa |
| bar to megapascal | 0.1 MPa |
| bar to psi | 14.50377377 psi |
| bar to millibar | 1000 mbar |
| bar to decibar | 10 dbar |
| bar to torr | 750.0616827 Torr |
| bar to millimeter of mercury | 750.0615758 mmHg |
| bar to millimeter of water | 10197.16213 mmH₂O |
| bar to centimeter of water | 1019.716213 cmH₂O |
| bar to inch of water | 401.463076 inH₂O |
| bar to inch of water (60 °F) | 401.864652 inH₂O (60 °F) |
| bar to inch of mercury | 29.5299833 inHg |
| bar to atmosphere | 0.9869232667 atm |
| bar to barye | 1000000 Ba |
Frequently asked questions
How many mmHg is 1 bar?
1 bar = 750.0615758 mmHg.
How many millimeters of mercury are in 1 bar?
1 bar = 750.0615758 mmHg.
How do I convert bar to millimeters of mercury?
Multiply the value in bar by 750.0615758. For example, 0.5 bar × 750.0615758 = 375.0307879 mmHg.
Is the bar to mmHg conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "bar".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "millimeter of mercury, conventional (mmHg)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Bar to Millimeters of Mercury (bar to mmHg). Retrieved October 18, 2026, from https://scientificconverters.com/pressure/bar-to-millimeter-of-mercury/
IEEE
Scientific Converters, "Convert Bar to Millimeters of Mercury (bar to mmHg)," scientificconverters.com. Accessed: Oct. 18, 2026. [Online]. Available: https://scientificconverters.com/pressure/bar-to-millimeter-of-mercury/