Online calculator to convert millimeters of mercury to atmospheres (mmHg to atm) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Pressure units.
Conversion Calculator
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Convert mmHg to atm
TIP: If the result of your conversion is 0, try increasing the "Decimals".
Conversion Definitions
The following is a list of definitions relating to conversions between mmHg and atmospheres.
What is millimeters of mercury (mmHg)?
Millimeters of mercury is a non-SI unit of Pressure. The symbol for millimeters of mercury is mmHg. There are 760 mmHg in an atmosphere.
What is an atmosphere (atm)?
An atmosphere (or standard atmosphere) is a non-SI unit of Pressure. The symbol for atmosphere is atm. There are 0.00131579 atmospheres in a mmHg.
Conversion Formula
Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.
The formula to convert from mmHg to atm is:
atm = mmHg ÷ 760
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from millimeters of mercury to atmospheres (mmHg to atm).
mmHg to Atmosphere Conversion Example
Task: Convert 975 mmHg to atmospheres (show work) Formula: mmHg ÷ 760 = atm Calculations: 975 mmHg ÷ 760 = 1.28289474 atm Result: 975 mmHg is equal to 1.28289474 atm
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from mmHg to atm.
mmHg to Atmospheres Conversion Chart
| millimeters of mercury (mmHg) | atmospheres (atm) |
|---|---|
| 1 mmHg | 0.00131579 atm |
| 2 mmHg | 0.00263158 atm |
| 3 mmHg | 0.00394737 atm |
| 4 mmHg | 0.00526316 atm |
| 5 mmHg | 0.00657895 atm |
| 6 mmHg | 0.00789474 atm |
| 7 mmHg | 0.00921053 atm |
| 8 mmHg | 0.01052632 atm |
| 9 mmHg | 0.01184211 atm |
| 10 mmHg | 0.01315789 atm |
| 20 mmHg | 0.02631579 atm |
| 30 mmHg | 0.03947368 atm |
| 40 mmHg | 0.05263158 atm |
| 50 mmHg | 0.06578947 atm |
| 75 mmHg | 0.09868421 atm |
| 100 mmHg | 0.13157895 atm |
| 250 mmHg | 0.32894737 atm |
| 500 mmHg | 0.65789474 atm |
| 750 mmHg | 0.98684211 atm |
| 1,000 mmHg | 1.31578947 atm |
| 2,500 mmHg | 3.28947368 atm |
| 5,000 mmHg | 6.57894737 atm |
| 7,500 mmHg | 9.86842105 atm |
| 10,000 mmHg | 13.15789474 atm |
| 25,000 mmHg | 32.89473684 atm |
| 50,000 mmHg | 65.78947368 atm |
| 75,000 mmHg | 98.68421053 atm |
| 100,000 mmHg | 131.57894737 atm |
| 250,000 mmHg | 328.94736842 atm |
Related Units
This table provides a summary of the Pressure units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| pascal | Pa | International System of Units (SI) |
| kilopascal | kPa | International System of Units (SI) |
| megapascal | MPa | International System of Units (SI) |
| atmosphere | atm | Non-SI (International) |
| pounds per square inch | psi or lbf/in2 | Non-SI (International) |
| millimeters of mercury | mmHg | Non-SI (International) |
| bar | bar | Non-SI (International) |
| torr | Torr | Non-SI (International) |
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