Torr to mmHg
Convert torr to mmhg instantly. 1 Torr = 0.9999998575 mmHg. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert torr to mmhg
To convert torr to mmhg, divide by 1.0000001425 (multiply by 0.9999998575). 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.
mmHg = Torr × 0.9999998575
Torr to mmHg conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Torr | mmHg |
|---|---|
| 1 Torr | 1 mmHg |
| 2 Torr | 2 mmHg |
| 3 Torr | 3 mmHg |
| 5 Torr | 4.999999 mmHg |
| 10 Torr | 9.999999 mmHg |
| 20 Torr | 19.999997 mmHg |
| 25 Torr | 24.999996 mmHg |
| 50 Torr | 49.999993 mmHg |
| 100 Torr | 99.999986 mmHg |
| 500 Torr | 499.999929 mmHg |
| 1,000 Torr | 999.999858 mmHg |
What is a torr?
One 760th of an atmosphere, near-identical to a millimetre of mercury.
What is a mmhg?
Millimetres of mercury, still the clinical unit for blood pressure.
The formula
mmHg = Torr × 0.9999998575
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 Torr to mmHg
- Type the number of torr you want to convert.
- Read the result in mmhg 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 mmhg to torr page.
Torr to mmHg — frequently asked questions
How many mmhg are in a torr?
One torr equals 0.9999998575 mmHg. mmHg = Torr × 0.9999998575
What is the formula to convert torr to mmhg?
The formula is mmHg = Torr × 0.9999998575. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert mmhg back to torr?
Divide instead of multiplying: one mmhg is 1.0000001425 Torr. 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 torr to mmhg 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 torr to mmhg.
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- torr2mmhg
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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