Millimeter of mercury (mmHg)
The millimeter of mercury is used in medicine, vacuum technology, and barometric measurement.
History: the millimeter of mercury comes from barometers and manometers where pressure balances a mercury column.
Quickly convert millimeters of mercury to atmospheres without lookup tables or manual math.
This page is focused on converting millimeters of mercury to atmospheres. Type a number into the first field and the result appears immediately in the second field.
Example: 1 mmHg = 0.0013157897 atm. Conversion formula: result = value × 133.322387415 / 101325.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The millimeter of mercury is used in medicine, vacuum technology, and barometric measurement.
History: the millimeter of mercury comes from barometers and manometers where pressure balances a mercury column.
The atmosphere reflects approximate air pressure at sea level and is used as a practical pressure measure.
History: the standard atmosphere began as an approximation of mean air pressure at sea level.
Enter a value in the Millimeter of mercury field. The converter applies the formula "result = value × 133.322387415 / 101325" and immediately shows the result in atmospheres.
1 mmHg = 0.0013157897 atm.
Yes. Use the swap button or choose the reverse pair from the full conversion list.