Pressure
Millimeters of Mercury to Atmospheres
Convert millimeters of mercury to atmospheres instantly.
About this conversion
Millimeters of mercury (mmHg) are used for blood pressure. Normal blood pressure is approximately 120/80 mmHg. Atmospheres (atm) equal normal air pressure at sea level: 1 atm = 101,325 Pa ≈ 1.013 bar. Use the converter above to quickly go from millimeters of mercury to atmospheres.
How to use
Enter a value in the millimeters of mercury field and instantly see the result in atmospheres. Click the swap button to reverse the conversion.
Manual calculation
1 millimeters of mercury = 0.0013158 atmospheres. Example: 10 mmHg = 0.013158 atm.
Frequently asked questions
How many atmospheres are in 1 millimeters of mercury?
1 Millimeters of Mercury equals 0.0013158 atmospheres.
When do you use atmospheres?
Atmospheres (atm) equal normal air pressure at sea level: 1 atm = 101,325 Pa ≈ 1.013 bar.