Inches of Mercury to Torr
Convert inches of mercury to torr instantly. 1 inHg = 25.4000063163 Torr. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert inches of mercury to torr
To convert inches of mercury to torr, multiply by 25.4000063163. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
Torr = inHg × 25.4000063163
Inches of Mercury to Torr conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Inches of Mercury | Torr |
|---|---|
| 1 inHg | 25.400006 Torr |
| 2 inHg | 50.800013 Torr |
| 3 inHg | 76.200019 Torr |
| 5 inHg | 127.000032 Torr |
| 10 inHg | 254.000063 Torr |
| 20 inHg | 508.000126 Torr |
| 25 inHg | 635.000158 Torr |
| 50 inHg | 1,270 Torr |
| 100 inHg | 2,540 Torr |
| 500 inHg | 12,700 Torr |
| 1,000 inHg | 25,400.01 Torr |
What is a inches of mercury?
The aviation altimeter unit: 29.92 inHg is standard sea-level pressure.
What is a torr?
One 760th of an atmosphere, near-identical to a millimetre of mercury.
The formula
Torr = inHg × 25.4000063163
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Inches of Mercury to Torr
- Type the number of inches of mercury you want to convert.
- Read the result in torr straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked torr to inches of mercury page.
Inches of Mercury to Torr — frequently asked questions
How many torr are in a inches of mercury?
One inches of mercury equals 25.4000063163 Torr. Torr = inHg × 25.4000063163
What is the formula to convert inches of mercury to torr?
The formula is Torr = inHg × 25.4000063163. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert torr back to inches of mercury?
Divide instead of multiplying: one torr is 0.0393700689 inHg. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this inches of mercury to torr free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the inches of mercury to torr.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error