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
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
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.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to Torrs
mmHg and Torr both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. 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
100 mmHg × 1.000000142 = 100.0000142 Torr
100 mmhgs = 100.0000142 torrs.
Conversion table
| mmHg (mmHg) | Torr (Torr) |
|---|---|
| 1 mmHg | 1.000000142 Torr |
| 10 mmHg | 10.00000142 Torr |
| 50 mmHg | 50.00000712 Torr |
| 100 mmHg | 100.0000142 Torr |
| 500 mmHg | 500.0000712 Torr |
| 1,000 mmHg | 1,000.000142 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 engineering.
What is a torr?
Torr (Torr) is a unit of engineering.
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.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.