Millimeters of Mercury to Pascals Converter
1 millimeter of mercury = 133.3224 pascals
Almost identical to the torr, but defined separately. This uses conventional mmHg, not a temperature-specific mercury-column realization.
1 millimeter of mercury equals 133.322 pascals
How to convert millimeters of mercury to pascals
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.
Pa = mmHg × 133.3224One millimeter of mercury is 133.3224 pascals, so a single multiplication converts any value.
1,333.22 Pa ≈ 10 × 133.3224Almost identical to the torr, but defined separately. This uses conventional mmHg, not a temperature-specific mercury-column realization.
Millimeters of mercury to pascals conversion table
Common values in millimeters of mercury, converted to pascals.
| Millimeters of mercury (mmHg) | Pascals (Pa) |
|---|---|
| 1 | 133.3224 |
| 2 | 266.6448 |
| 3 | 399.9672 |
| 4 | 533.2896 |
| 5 | 666.612 |
| 10 | 1,333.224 |
| 20 | 2,666.448 |
| 25 | 3,333.06 |
| 50 | 6,666.12 |
| 100 | 13,332.24 |
| 250 | 33,330.6 |
| 500 | 66,661.2 |
| 1,000 | 133,322.4 |
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.
pascalPa
The SI derived unit of pressure: one newton per square metre.
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.