Convert mm Hg to atm and other pressure units, or calculate partial pressure, altitude-pressure, and depth-pressure values in one tool.

Unit conversion preserves the inputโ€™s gauge or absolute reference.

Mmhg To Atm Formula

The following formula is used to calculate the conversion from millimeters of mercury (mmHg) to atmospheres (atm).

ATM โ‰ˆ MMHG / 760

Variables:

  • ATM is the pressure in atmospheres
  • MMHG is the pressure in millimeters of mercury

Dividing mmHg by 760 gives a practical approximation. The calculator uses conventional mmHg = 133.322387415 Pa and 1 atm = 101,325 Pa; Torr is exactly 1/760 atm.

mm Hg to Atmospheres Conversion Table
mm Hg Atmospheres (atm)
10.001316
50.006579
100.013158
150.019737
200.026316
400.052632
500.065789
750.098684
1000.131579
1200.157895
1500.197368
2000.263158
2500.328947
3000.394737
4000.526316
5000.657895
6000.789474
7000.921053
7500.986842
7601.000000
Based on 1 atm = 101,325 Pa and 1 mm Hg = 133.322387415 Pa. For practical use, 1 atm โ‰ˆ 760 mm Hg.

What is a Mmhg To Atm?

Mmhg to Atm is a conversion between two units of pressure. Mmhg, or millimeters of mercury, is a unit of pressure typically used in medicine and meteorology, while Atm, or atmosphere, is a unit of pressure often used in chemistry and physics. The conversion is used to express the same amount of pressure in different units, with 1 Atm being approximately equal to 760 Mmhg.

How to Calculate Mmhg To Atm?

The following steps outline how to convert pressure from mmHg to atm using the formula: ATM โ‰ˆ MMHG / 760.


  1. First, determine the pressure in mmHg.
  2. Next, multiply mmHg by 133.322387415 and divide by 101,325, or use mmHg รท 760 for the practical approximation.
  3. Finally, calculate the pressure in atm.
  4. After inserting the pressure in mmHg and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Pressure in mmHg = 570