Convert PSI to millimeters of mercury
1 psi = 51.714925 mmHg. Change the amount below, or read the formula and the reference table further down.
1 PSI equals
millimeters of mercury
1 psi = 51.714925 mmHg
The formula
PSI and millimeters of mercury both measure pressure from the same zero, so a single multiplier does the job.
mmHg = psi × 51.7149252
Going the other way? Convert millimeters of mercury to PSI.
PSI to millimeters of mercury table
Common values, rounded for reading.
| PSI (psi) | Millimeters of mercury (mmHg) |
|---|---|
| 1 | 51.7149 |
| 2 | 103.43 |
| 3 | 155.14 |
| 4 | 206.86 |
| 5 | 258.57 |
| 6 | 310.29 |
| 7 | 362 |
| 8 | 413.72 |
| 9 | 465.43 |
| 10 | 517.15 |
| 15 | 775.72 |
| 20 | 1,034.3 |
| 25 | 1,292.87 |
| 30 | 1,551.45 |
| 40 | 2,068.6 |
| 50 | 2,585.75 |
| 75 | 3,878.62 |
| 100 | 5,171.49 |
| 250 | 12,928.73 |
| 500 | 25,857.46 |
| 1,000 | 51,714.93 |
Questions people ask
- How many millimeters of mercury are in a PSI?
- One PSI equals 51.7149252 millimeters of mercury.
- How do I convert PSI to millimeters of mercury by hand?
- Multiply the number of PSI by 51.7149252. For a rough check, 51.7 is close enough for most everyday use.
- What is 1 PSI in millimeters of mercury?
- 1 PSI is 51.714925 millimeters of mercury.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.