Inches of mercury.
inHgs to Torrs Converter — inHg to Torr
Convert inHg (inHg) to Torr (Torr) using the exact conversion factor (1 inhg = 25.40000632 torr). See the formula, worked examples, and conversion table.
inHgs 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 3386.389 / 133.3223684.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting inHgs to Torrs
inHg 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: Inches of mercury, and a torr is 1/760 standard atmosphere.
Formula
torrs = inhgs × 25.4000063163
This factor comes from each unit's defined relationship to the category's base unit: 1 inhg equals 3386.389 base units, and 1 torr equals 133.322368421 base units, so dividing one by the other gives the direct inhg-to-torr factor of 25.4000063163.
Simple example
1 inHg × 25.40000632 = 25.40000632 Torr
1 inhg = 25.40000632 torrs.
Real-world example
100 inHg × 25.40000632 = 2,540.000632 Torr
100 inhgs = 2,540.000632 torrs.
Conversion table
| inHg (inHg) | Torr (Torr) |
|---|---|
| 1 inHg | 25.40000632 Torr |
| 10 inHg | 254.0000632 Torr |
| 50 inHg | 1,270.000316 Torr |
| 100 inHg | 2,540.000632 Torr |
| 500 inHg | 12,700.00316 Torr |
| 1,000 inHg | 25,400.00632 Torr |
Reverse conversion: Torr to inHg
25.40000632 Torr × 0.03937006895 = 1 inHg
25.40000632 torrs = 1 inhgs.
inhgs = torrs × 0.0393700689499
For a page dedicated to this direction, see Torr to inHg.
Understanding the inHg (inHg)
Inches of mercury.
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 inhg?
1 inhg equals 25.40000632 torrs, using the exact defined conversion factor rather than an estimate.
How do I convert inhg to torr?
Multiply the inhg value by 25.40000632. The converter above does this instantly to whatever precision you set.
How do I convert torr back to inhg?
Use the reverse factor: 1 torr equals 0.039370069 inhgs. You can also use the swap control in the converter above to flip the direction instantly.
What is a inhg?
inHg (inHg) is a unit of engineering.
What is a torr?
Torr (Torr) is a unit of engineering.
Is the inhg to torr conversion exact?
Yes. Both inhg and torr are defined by fixed standards rather than physical artifacts, so the factor of 25.40000632 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.