Millimeters of mercury at standard gravity.
mmHgs to Torrs Converter — mmHg to Torr
Convert mmHg (mmHg) to Torr (Torr) using the exact conversion factor (1 mmhg = 1.000000142 torr). See the formula, worked examples, and conversion table.
mmHgs to Torrs 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.
A torr is 1/760 standard atmosphere.
Result = input x 133.3223874 / 133.3223684.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to Torrs
mmHg and Torr 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 a torr is 1/760 standard atmosphere.
Formula
torrs = mmhgs × 1.00000014247
This factor comes from each unit's defined relationship to the category's base unit: 1 mmhg equals 133.322387415 base units, and 1 torr equals 133.322368421 base units, so dividing one by the other gives the direct mmhg-to-torr factor of 1.00000014247.
Simple example
1 mmHg × 1.000000142 = 1.000000142 Torr
1 mmhg = 1.000000142 torrs.
Real-world example
35 mmHg × 1.000000142 = 35.00000499 Torr
35 mmhgs = 35.00000499 torrs.
Conversion table
| mmHg (mmHg) | Torr (Torr) |
|---|---|
| 1 mmHg | 1.000000142 Torr |
| 5 mmHg | 5.000000712 Torr |
| 10 mmHg | 10.00000142 Torr |
| 25 mmHg | 25.00000356 Torr |
| 50 mmHg | 50.00000712 Torr |
| 100 mmHg | 100.0000142 Torr |
Reverse conversion: Torr to mmHg
1.000000142 Torr × 0.9999998575 = 0.9999999995 mmHg
1.000000142 torrs = 0.9999999995 mmhgs.
mmhgs = torrs × 0.999999857534
For a page dedicated to this direction, see Torr to mmHg.
Understanding the mmHg (mmHg)
Millimeters of mercury at standard gravity.
Understanding the Torr (Torr)
A torr is 1/760 standard atmosphere.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many torrs are in 1 mmhg?
1 mmhg equals 1.000000142 torrs, using the exact defined conversion factor rather than an estimate.
How do I convert mmhg to torr?
Multiply the mmhg value by 1.000000142. The converter above does this instantly to whatever precision you set.
How do I convert torr back to mmhg?
Use the reverse factor: 1 torr equals 0.9999998575 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 torr?
Torr (Torr) is a unit of pressure.
Is the mmhg to torr conversion exact?
Yes. Both mmhg and torr are defined by fixed standards rather than physical artifacts, so the factor of 1.000000142 used above is exact to as many digits as you choose to display.