Table Of Contents
Inch of mercury to Torr Conversion
1 inch of mercury (inHg) is equal to 25.40000362 Torr (Torr).
1 inHg = 25.40000362 Torr
or
1 Torr = 0.03937007313 inHg
Formula
To convert a pressure from inch of mercury (inHg) to Torr (Torr), multiply the pressure in inch of mercury by 25.40000362
p(Torr) = p(inHg) × 25.40000362
Examples:
Convert 5 inch of mercury to Torr:
p(Torr) = 5inHg × 25.40000362 = 127.0000181 Torr
Conversion table
| Inch of mercury (inHg) | Torr (Torr) |
|---|---|
| 1 inHg | 25.400003619 Torr |
| 2 inHg | 50.800007237 Torr |
| 3 inHg | 76.200010856 Torr |
| 5 inHg | 127.000018093 Torr |
| 10 inHg | 254.000036186 Torr |
| 20 inHg | 508.000072373 Torr |
| 25 inHg | 635.000090466 Torr |
| 50 inHg | 1270.000180932 Torr |
| 100 inHg | 2540.000361864 Torr |
| 250 inHg | 6350.000904661 Torr |
| 500 inHg | 12700.001809322 Torr |
| 1000 inHg | 25400.003618645 Torr |
| Torr (Torr) | Inch of mercury (inHg) |
|---|---|
| 1 Torr | 0.039370073 inHg |
| 2 Torr | 0.078740146 inHg |
| 3 Torr | 0.118110219 inHg |
| 5 Torr | 0.196850366 inHg |
| 10 Torr | 0.393700731 inHg |
| 20 Torr | 0.787401463 inHg |
| 25 Torr | 0.984251828 inHg |
| 50 Torr | 1.968503657 inHg |
| 100 Torr | 3.937007313 inHg |
| 250 Torr | 9.842518283 inHg |
| 500 Torr | 19.685036566 inHg |
| 1000 Torr | 39.370073131 inHg |
Frequently asked questions
How do I convert inch of mercury to Torr?
Multiply the value in inch of mercury by 25.40000362 to get the result in Torr. For example, 5 inHg × 25.40000362 = 127.000018093 Torr.
How many Torr are in 1 inch of mercury?
1 inch of mercury (inHg) is equal to 25.400003619 Torr (Torr).
How do I convert Torr back to inch of mercury?
Use the inverse operation: divide the value in Torr by 25.40000362 to get the result in inch of mercury.
How accurate is the inch of mercury to Torr conversion?
The converter multiplies by the conversion factor 25.40000362 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- ISO 80000-4:2019 — Quantities and units — Part 4: Mechanics
- NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically (NIST SP 811, 2008 edition)
- Resolution 4 of the 10th CGPM (1954): Definition of the standard atmosphere
