Millimeters of Mercury to Bars Converter
1 millimeter of mercury = 0.001333224 bars
Almost identical to the torr, but defined separately. This uses conventional mmHg, not a temperature-specific mercury-column realization.
1 millimeter of mercury equals 0.00133322 bars
How to convert millimeters of mercury to bars
Unit conversion preserves the pressure reference. Gauge pressure and absolute pressure are different readings; changing between them also needs the ambient pressure. Mercury and water-column units use the conventions stated in their unit notes.
bar = mmHg × 0.001333224One millimeter of mercury is 0.001333224 bars, so a single multiplication converts any value.
0.0133322 bar ≈ 10 × 0.001333224Almost identical to the torr, but defined separately. This uses conventional mmHg, not a temperature-specific mercury-column realization.
Millimeters of mercury to bars conversion table
Common values in millimeters of mercury, converted to bars.
| Millimeters of mercury (mmHg) | Bars (bar) |
|---|---|
| 1 | 0.001333224 |
| 2 | 0.002666448 |
| 3 | 0.003999672 |
| 4 | 0.005332896 |
| 5 | 0.00666612 |
| 10 | 0.01333224 |
| 20 | 0.02666448 |
| 25 | 0.0333306 |
| 50 | 0.0666612 |
| 100 | 0.1333224 |
| 250 | 0.333306 |
| 500 | 0.666612 |
| 1,000 | 1.333224 |
About these units
millimeter of mercurymmHg
The conventional millimetre of mercury: 133.3224 Pa, following the NIST SP 811 convention.
Reference: NIST Special Publication 811.
barbar
Exactly 100,000 pascals, close to average atmospheric pressure at sea level.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.