Convert inches of mercury to PSI
1 inHg = 0.49115415 psi. Change the amount below, or read the formula and the reference table further down.
1 inch of mercury equals
PSI
1 inHg = 0.49115415 psi
The formula
Inches of mercury and PSI both measure pressure from the same zero, so a single multiplier does the job.
psi = inHg × 0.4911541475
Going the other way? Convert PSI to inches of mercury.
Inches of mercury to PSI table
Common values, rounded for reading.
| Inches of mercury (inHg) | PSI (psi) |
|---|---|
| 1 | 0.491154 |
| 2 | 0.982308 |
| 3 | 1.4735 |
| 4 | 1.9646 |
| 5 | 2.4558 |
| 6 | 2.9469 |
| 7 | 3.4381 |
| 8 | 3.9292 |
| 9 | 4.4204 |
| 10 | 4.9115 |
| 15 | 7.3673 |
| 20 | 9.8231 |
| 25 | 12.2789 |
| 30 | 14.7346 |
| 40 | 19.6462 |
| 50 | 24.5577 |
| 75 | 36.8366 |
| 100 | 49.1154 |
| 250 | 122.79 |
| 500 | 245.58 |
| 1,000 | 491.15 |
Questions people ask
- How many PSI are in a inch of mercury?
- One inch of mercury equals 0.4911541475 PSI.
- How do I convert inches of mercury to PSI by hand?
- Multiply the number of inches of mercury by 0.4911541475. For a rough check, 0.491 is close enough for most everyday use.
- What is 1 inch of mercury in PSI?
- 1 inch of mercury is 0.49115415 PSI.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.