A torr is 1/760 standard atmosphere.
Torrs to inHgs Converter — Torr to inHg
Convert Torr (Torr) to inHg (inHg) using the exact conversion factor (1 torr = 0.039370069 inhg). See the formula, worked examples, and conversion table.
Torrs to inHgs 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.
Inches of mercury.
Result = input x 133.3223684 / 3386.389.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Torrs to inHgs
Torr and inHg 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: A torr is 1/760 standard atmosphere, and inches of mercury.
Formula
inhgs = torrs × 0.0393700689499
This factor comes from each unit's defined relationship to the category's base unit: 1 torr equals 133.322368421 base units, and 1 inhg equals 3386.389 base units, so dividing one by the other gives the direct torr-to-inhg factor of 0.0393700689499.
Simple example
1 Torr × 0.03937006895 = 0.039370069 inHg
1 torr = 0.039370069 inhgs.
Real-world example
100 Torr × 0.03937006895 = 3.937006895 inHg
100 torrs = 3.937006895 inhgs.
Conversion table
| Torr (Torr) | inHg (inHg) |
|---|---|
| 1 Torr | 0.039370069 inHg |
| 10 Torr | 0.3937006895 inHg |
| 50 Torr | 1.968503447 inHg |
| 100 Torr | 3.937006895 inHg |
| 500 Torr | 19.68503447 inHg |
| 1,000 Torr | 39.37006895 inHg |
Reverse conversion: inHg to Torr
0.039370069 inHg × 25.40000632 = 1.000000001 Torr
0.039370069 inhgs = 1.000000001 torrs.
torrs = inhgs × 25.4000063163
For a page dedicated to this direction, see inHg to Torr.
Understanding the Torr (Torr)
A torr is 1/760 standard atmosphere.
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 torr?
1 torr equals 0.039370069 inhgs, using the exact defined conversion factor rather than an estimate.
How do I convert torr to inhg?
Multiply the torr value by 0.03937006895. The converter above does this instantly to whatever precision you set.
How do I convert inhg back to torr?
Use the reverse factor: 1 inhg equals 25.40000632 torrs. You can also use the swap control in the converter above to flip the direction instantly.
What is a torr?
Torr (Torr) is a unit of engineering.
What is a inhg?
inHg (inHg) is a unit of engineering.
Is the torr to inhg conversion exact?
Yes. Both torr and inhg are defined by fixed standards rather than physical artifacts, so the factor of 0.03937006895 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.