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Millimeters Of Mercury to Inches Of Mercury Converter

0.0393700787

1 mmHg = 0.0393700787 inHg

How to convert millimeters of mercury to inches of mercury

inches of mercury = millimeters of mercury ÷ 25.4

To convert millimeters of mercury to inches of mercury, divide the number of millimeters of mercury by 25.4.

1 mmHg = 0.0393700787 inHg

Examples

  • 120 mmHg ÷ 25.4 = 4.72440945 inHg
  • Approximately standard atmospheric pressure: 760 mmHg ÷ 25.4 = 29.9212598 inHg

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 conventional inch of mercury, about 3386.389 Pa. Values defined at a specific mercury temperature differ slightly, for example 3376.85 Pa at 60 °F.

Millimeters of mercury to inches of mercury conversion table

Millimeters of mercury (mmHg) Inches of mercury (inHg)
1 mmHg 0.0393700787 inHg
10 mmHg 0.393700787 inHg
60 mmHg 2.36220472 inHg
70 mmHg 2.75590551 inHg
80 mmHg 3.1496063 inHg
90 mmHg 3.54330709 inHg
100 mmHg 3.93700787 inHg
110 mmHg 4.33070866 inHg
120 mmHg 4.72440945 inHg
130 mmHg 5.11811024 inHg
140 mmHg 5.51181102 inHg
160 mmHg 6.2992126 inHg
180 mmHg 7.08661417 inHg
200 mmHg 7.87401575 inHg
500 mmHg 19.6850394 inHg
760 mmHg 29.9212598 inHg

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.
Inch of mercury (inHg)
An inch of mercury is the pressure exerted by a 1 inch column of mercury, conventionally about 3386.389 pascals. It is used in the United States for barometric pressure in weather reports and aviation.

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