Pounds per Square Inch to Millimeters of Mercury Converter
1 pound per square inch ≈ 51.7149203 millimeters of mercury
Almost identical to the torr, but defined separately. This uses conventional mmHg, not a temperature-specific mercury-column realization.
1 pound per square inch equals 51.7149 millimeters of mercury
How to convert pounds per square inch to millimeters of mercury
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.
mmHg = psi × 51.71492032One pound per square inch is 51.71492032 millimeters of mercury, so a single multiplication converts any value.
517.149 mmHg ≈ 10 × 51.71492032Almost identical to the torr, but defined separately. This uses conventional mmHg, not a temperature-specific mercury-column realization.
Pounds per square inch to millimeters of mercury conversion table
Common values in pounds per square inch, converted to millimeters of mercury.
| Pounds per square inch (psi) | Millimeters of mercury (mmHg) |
|---|---|
| 1 | 51.71492 |
| 2 | 103.42984 |
| 3 | 155.14476 |
| 4 | 206.85968 |
| 5 | 258.5746 |
| 10 | 517.1492 |
| 20 | 1,034.2984 |
| 25 | 1,292.873 |
| 50 | 2,585.746 |
| 100 | 5,171.492 |
| 250 | 12,928.73 |
| 500 | 25,857.46 |
| 1,000 | 51,714.92 |
About these units
pound per square inchpsi
One pound-force per square inch. The US standard for tyre and fluid pressure.
millimeter of mercurymmHg
The conventional millimetre of mercury: 133.3224 Pa, following the NIST SP 811 convention.
Reference: NIST Special Publication 811.
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.