Convert Millimeters of Mercury to Atmospheres
mmHg to atm · pressure conversion
What are millimeters of mercury and atmospheres?
Millimeters of mercury measure pressure by the height of a mercury column, used for blood pressure. One atmosphere is the average air pressure at sea level, defined as 101,325 Pa. For reference: car tires run around 32 psi (220 kPa), and sea-level air pressure is about 101 kPa.
How to convert millimeters of mercury to atmospheres
1 mmHg = 0.00131579 atm. To convert, multiply the number of millimeters of mercury by 0.00131579. For example, 5 mmHg = 0.00657893 atm, and 20 mmHg = 0.0263157 atm. To go the other way, multiply atmospheres by 760.002 (since 1 atm = 760.002 mmHg).
Millimeters of Mercury to Atmospheres conversion table
| Millimeters of Mercury (mmHg) | Atmospheres (atm) |
|---|---|
| 1 | 0.00131579 |
| 2 | 0.00263157 |
| 5 | 0.00657893 |
| 10 | 0.0131579 |
| 50 | 0.0657893 |
| 100 | 0.131579 |
| 1,000 | 1.31579 |
FAQ
What is 1 mmHg in atm?
1 mmHg = 0.00131579 atm. To convert any amount, multiply the number of millimeters of mercury by 0.00131579.
How do I convert atmospheres back to millimeters of mercury?
Go the other way: 1 atm = 760.002 mmHg, so multiply atmospheres by 760.002 to get millimeters of mercury.
Is a millimeters of mercury bigger than a atmosphere?
No — 1 mmHg is the smaller unit, equal to 0.00131579 atm (it takes 760.002 mmHg to make one atm).
Are these pressure conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.