Convert millimeters of mercury to atmospheres
1 mmHg = 0.00131579 atm. Change the amount below, or read the formula and the reference table further down.
1 millimeter 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
Common values, rounded for reading.
| Millimeters of mercury (mmHg) | Atmospheres (atm) |
|---|---|
| 1 | 0.001316 |
| 2 | 0.002632 |
| 3 | 0.003947 |
| 4 | 0.005263 |
| 5 | 0.006579 |
| 6 | 0.007895 |
| 7 | 0.009211 |
| 8 | 0.010526 |
| 9 | 0.011842 |
| 10 | 0.013158 |
| 15 | 0.019737 |
| 20 | 0.026316 |
| 25 | 0.032895 |
| 30 | 0.039474 |
| 40 | 0.052632 |
| 50 | 0.065789 |
| 75 | 0.098684 |
| 100 | 0.131579 |
| 250 | 0.328947 |
| 500 | 0.657895 |
| 1,000 | 1.3158 |
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 1 millimeter of mercury in atmospheres?
- 1 millimeter of mercury is 0.00131579 atmospheres.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.