100 inches of mercury to PSI
100 inHg = 49.115415 psi. Change the amount below, or read the formula and the reference table further down.
100 inches 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
Values either side of 100 inHg.
| Inches of mercury (inHg) | PSI (psi) |
|---|---|
| 0 | 0 |
| 10 | 4.9115 |
| 20 | 9.8231 |
| 30 | 14.7346 |
| 40 | 19.6462 |
| 50 | 24.5577 |
| 60 | 29.4692 |
| 70 | 34.3808 |
| 80 | 39.2923 |
| 90 | 44.2039 |
| 100 | 49.1154 |
| 110 | 54.027 |
| 120 | 58.9385 |
| 130 | 63.85 |
| 140 | 68.7616 |
| 150 | 73.6731 |
| 160 | 78.5847 |
| 170 | 83.4962 |
| 180 | 88.4077 |
| 190 | 93.3193 |
| 200 | 98.2308 |
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 100 inches of mercury in PSI?
- 100 inches of mercury is 49.115415 PSI.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.