Conversion Amigo

Millimeters Of Mercury to Atmospheres Converter

0.00131578966

1 mmHg = 0.00131578966 atm

How to convert millimeters of mercury to atmospheres

atmospheres = millimeters of mercury ÷ 759.999892

To convert millimeters of mercury to atmospheres, divide the number of millimeters of mercury by 759.999892.

1 mmHg = 0.00131578966 atm

Examples

  • 120 mmHg ÷ 759.999892 = 0.157894759 atm
  • Approximately standard atmospheric pressure: 760 mmHg ÷ 759.999892 = 1.00000014 atm

Good to know

This is the conventional millimeter of mercury, 133.322387415 Pa. It differs from the torr (101,325/760 Pa) by less than one part in seven million, so the two are interchangeable in practice.

This is the standard atmosphere (atm), exactly 101,325 Pa. It is not the technical atmosphere (at), which is 1 kgf/cm² or 98,066.5 Pa.

Millimeters of mercury to atmospheres conversion table

Millimeters of mercury (mmHg) Atmospheres (atm)
1 mmHg 0.00131578966 atm
10 mmHg 0.0131578966 atm
60 mmHg 0.0789473797 atm
70 mmHg 0.0921052763 atm
80 mmHg 0.105263173 atm
90 mmHg 0.11842107 atm
100 mmHg 0.131578966 atm
110 mmHg 0.144736863 atm
120 mmHg 0.157894759 atm
130 mmHg 0.171052656 atm
140 mmHg 0.184210553 atm
160 mmHg 0.210526346 atm
180 mmHg 0.236842139 atm
200 mmHg 0.263157932 atm
500 mmHg 0.657894831 atm
760 mmHg 1.00000014 atm

Unit definitions

Millimeter of mercury (mmHg)
A millimeter of mercury is the pressure exerted by a 1 mm column of mercury, conventionally 133.322387415 pascals. It is the standard unit for blood pressure readings.
Atmosphere (atm)
The standard atmosphere is defined as exactly 101,325 pascals, approximately the average air pressure at sea level. It is used as a reference pressure in chemistry and physics.

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