Mm To Atm Conversion Calculator

Millimeters of Mercury to Atmospheres Calculator

To convert Millimeters of Mercury (mm) to Atmospheres (atm), enter pressure value in mm, the calculator will divide entered value by 760 to convert it to atm.

  • Input: Pressure in mmHg = 760
  • Calculation:
    Pressure in atm = 760 / 760 = 1 atm
  • Result: 1 atm

  • Input: Pressure in mmHg = 1520
  • Calculation:
    Pressure in atm = 1520 / 760 = 2 atm
  • Result: 2 atm

How to Convert Mm To Atm?

Converting from mmHg to atm requires dividing mmHg value by 760 (the number of millimeters of mercury in one standard atmosphere).

To convert 380 mmHg to atm, divide 380 by 760 to get 0.5 atm. The process works for any pressure value using this simple division step.

  • Input: Pressure in mmHg = 1140
  • Calculation:
    Pressure in atm = 1140 / 760 ≈ 1.5 atm
  • Result: 1.5 atm

Mm To Atm Conversion Formula

Basic Conversion Formula:

atm = mmHg ÷ 760

Where:

  • mmHg: Pressure in millimeters of mercury
  • 760: Number of mmHg in one atmosphere

Alternative Units Formula:

Pascal = mmHg × 133.322
Bar = atm × 1.01325

Where:

  • mmHg: Initial pressure in millimeters of mercury
  • 133.322: Conversion factor to pascals
  • 1.01325: Conversion factor to bar

Example 1: Normal Atmospheric Pressure

  • mmHg Value = 760 mmHg
  • Calculation = 760 ÷ 760
  • Result = 1.000 atm
  • In Pascal = 101,325 Pa

Example 2: Low Pressure

  • mmHg Value = 380 mmHg
  • Calculation = 380 ÷ 760
  • Result = 0.500 atm
  • In Pascal = 50,662.5 Pa

Example 3: High Pressure

  • mmHg Value = 1520 mmHg
  • Calculation = 1520 ÷ 760
  • Result = 2.000 atm
  • In Pascal = 202,650 Pa

Example 4: Medical Reading

  • mmHg Value = 120 mmHg
  • Calculation = 120 ÷ 760
  • Result = 0.158 atm
  • In Pascal = 15,998.6 Pa

Example 5: Weather Reading

  • mmHg Value = 755 mmHg
  • Calculation = 755 ÷ 760
  • Result = 0.993 atm
  • In Pascal = 100,658 Pa

What is Mm and Atm?

Millimeters of Mercury (mmHg): A unit of pressure defined as the pressure exerted by a column of mercury 1 millimeter high. The formula is: P = ρgh Where:

  • ρ: Density of mercury
  • g: Acceleration due to gravity
  • h: Height of mercury column

Atmosphere (atm): A unit of pressure equal to the average pressure exerted by Earth’s atmosphere at sea level. Where:

  • 1 atm = 760 mmHg
  • 1 atm = 101,325 Pascal

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