1 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
Values either side of 1 psi.
| PSI (psi) | Millimeters of mercury (mmHg) |
|---|---|
| -4 | -206.86 |
| -3.5 | -181 |
| -3 | -155.14 |
| -2.5 | -129.29 |
| -2 | -103.43 |
| -1.5 | -77.5724 |
| -1 | -51.7149 |
| -0.5 | -25.8575 |
| 0 | 0 |
| 0.5 | 25.8575 |
| 1 | 51.7149 |
| 1.5 | 77.5724 |
| 2 | 103.43 |
| 2.5 | 129.29 |
| 3 | 155.14 |
| 3.5 | 181 |
| 4 | 206.86 |
| 4.5 | 232.72 |
| 5 | 258.57 |
| 5.5 | 284.43 |
| 6 | 310.29 |
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.