100 inches of mercury to atmospheres
100 inHg = 3.342106 atm. Change the amount below, or read the formula and the reference table further down.
100 inches of mercury equals
atmospheres
1 inHg = 0.03342106 atm
The formula
Inches of mercury and atmospheres both measure pressure from the same zero, so a single multiplier does the job.
atm = inHg × 0.0334210574
Going the other way? Convert atmospheres to inches of mercury.
Inches of mercury to atmospheres table
Values either side of 100 inHg.
| Inches of mercury (inHg) | Atmospheres (atm) |
|---|---|
| 0 | 0 |
| 10 | 0.334211 |
| 20 | 0.668421 |
| 30 | 1.0026 |
| 40 | 1.3368 |
| 50 | 1.6711 |
| 60 | 2.0053 |
| 70 | 2.3395 |
| 80 | 2.6737 |
| 90 | 3.0079 |
| 100 | 3.3421 |
| 110 | 3.6763 |
| 120 | 4.0105 |
| 130 | 4.3447 |
| 140 | 4.6789 |
| 150 | 5.0132 |
| 160 | 5.3474 |
| 170 | 5.6816 |
| 180 | 6.0158 |
| 190 | 6.35 |
| 200 | 6.6842 |
Questions people ask
- How many atmospheres are in a inch of mercury?
- One inch of mercury equals 0.0334210574 atmospheres.
- How do I convert inches of mercury to atmospheres by hand?
- Multiply the number of inches of mercury by 0.0334210574. For a rough check, 0.033 is close enough for most everyday use.
- What is 100 inches of mercury in atmospheres?
- 100 inches of mercury is 3.342106 atmospheres.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.