Millimeters of mercury at standard gravity.
mmHgs to inHgs Converter — mmHg to inHg
Convert mmHg (mmHg) to inHg (inHg) using the exact conversion factor (1 mmhg = 0.0393700746 inhg). See the formula, worked examples, and conversion table.
mmHgs to inHgs converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
Inches of mercury.
Result = input x 133.3223874 / 3386.389.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to inHgs
mmHg and inHg both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: Millimeters of mercury at standard gravity, and inches of mercury.
Formula
inhgs = mmhgs × 0.0393700745588
This factor comes from each unit's defined relationship to the category's base unit: 1 mmhg equals 133.322387415 base units, and 1 inhg equals 3386.389 base units, so dividing one by the other gives the direct mmhg-to-inhg factor of 0.0393700745588.
Simple example
1 mmHg × 0.03937007456 = 0.0393700746 inHg
1 mmhg = 0.0393700746 inhgs.
Real-world example
35 mmHg × 0.03937007456 = 1.37795261 inHg
35 mmhgs = 1.37795261 inhgs.
Conversion table
| mmHg (mmHg) | inHg (inHg) |
|---|---|
| 1 mmHg | 0.0393700746 inHg |
| 5 mmHg | 0.1968503728 inHg |
| 10 mmHg | 0.3937007456 inHg |
| 25 mmHg | 0.984251864 inHg |
| 50 mmHg | 1.968503728 inHg |
| 100 mmHg | 3.937007456 inHg |
Reverse conversion: inHg to mmHg
0.0393700746 inHg × 25.4000027 = 1.000000001 mmHg
0.0393700746 inhgs = 1.000000001 mmhgs.
mmhgs = inhgs × 25.4000026977
For a page dedicated to this direction, see inHg to mmHg.
Understanding the mmHg (mmHg)
Millimeters of mercury at standard gravity.
Understanding the inHg (inHg)
Inches of mercury.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many inhgs are in 1 mmhg?
1 mmhg equals 0.0393700746 inhgs, using the exact defined conversion factor rather than an estimate.
How do I convert mmhg to inhg?
Multiply the mmhg value by 0.03937007456. The converter above does this instantly to whatever precision you set.
How do I convert inhg back to mmhg?
Use the reverse factor: 1 inhg equals 25.4000027 mmhgs. You can also use the swap control in the converter above to flip the direction instantly.
What is a mmhg?
mmHg (mmHg) is a unit of pressure.
What is a inhg?
inHg (inHg) is a unit of pressure.
Is the mmhg to inhg conversion exact?
Yes. Both mmhg and inhg are defined by fixed standards rather than physical artifacts, so the factor of 0.03937007456 used above is exact to as many digits as you choose to display.