100 millimeters of mercury to atmospheres
100 mmHg = 0.13157897 atm. Change the amount below, or read the formula and the reference table further down.
100 millimeters of mercury equals
atmospheres
1 mmHg = 0.00131579 atm
The formula
Millimeters of mercury and atmospheres both measure pressure from the same zero, so a single multiplier does the job.
atm = mmHg × 0.0013157897
Going the other way? Convert atmospheres to millimeters of mercury.
Millimeters of mercury to atmospheres table
Values either side of 100 mmHg.
| Millimeters of mercury (mmHg) | Atmospheres (atm) |
|---|---|
| 0 | 0 |
| 10 | 0.013158 |
| 20 | 0.026316 |
| 30 | 0.039474 |
| 40 | 0.052632 |
| 50 | 0.065789 |
| 60 | 0.078947 |
| 70 | 0.092105 |
| 80 | 0.105263 |
| 90 | 0.118421 |
| 100 | 0.131579 |
| 110 | 0.144737 |
| 120 | 0.157895 |
| 130 | 0.171053 |
| 140 | 0.184211 |
| 150 | 0.197368 |
| 160 | 0.210526 |
| 170 | 0.223684 |
| 180 | 0.236842 |
| 190 | 0.25 |
| 200 | 0.263158 |
Questions people ask
- How many atmospheres are in a millimeter of mercury?
- One millimeter of mercury equals 0.0013157897 atmospheres.
- How do I convert millimeters of mercury to atmospheres by hand?
- Multiply the number of millimeters of mercury by 0.0013157897. For a rough check, 0.001 is close enough for most everyday use.
- What is 100 millimeters of mercury in atmospheres?
- 100 millimeters of mercury is 0.13157897 atmospheres.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.