Convert millimeters of mercury to torr

1 mmHg=1Torr

Use the converter below to change any millimeters of mercury value into torr instantly — with formula, conversion table, and real-world examples.

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Conversion formula

Forward

torr = millimeters of mercury × 1

Reverse

millimeters of mercury = torr × 1

Example: 10 mmHg × 1 = 10 Torr.

About both units

From

Millimeter of Mercury

mmHg

The millimetre of mercury equals about 133.3 Pa — the pressure exerted by a 1 mm column of mercury at 0 °C under standard gravity. Traditionally and still used in medicine: blood pressure of 120/80 mmHg.

Real-world: Normal blood pressure: 120/80 mmHg. Atmospheric: 760 mmHg. Good vacuum: <1 mmHg.

Read full millimeter of mercury reference →

Torr

The torr equals 1/760 atm — approximately 133.32 Pa. Essentially equivalent to mmHg but defined slightly differently. Used in vacuum-system engineering and older physics.

Real-world: Low-vacuum: 760 to 25 torr. High-vacuum: 10⁻³ to 10⁻⁹ torr. Semiconductor fabrication: often below 10⁻⁶ torr.

Read full torr reference →

Millimeter of Mercury to Torr conversion table

Common millimeters of mercury to torr values for quick reference.

Millimeter of Mercury (mmHg)	Torr (Torr)
1 mmHg	1 Torr
5 mmHg	5 Torr
10 mmHg	10 Torr
25 mmHg	25 Torr
50 mmHg	50 Torr
100 mmHg	100 Torr
200 mmHg	200 Torr
500 mmHg	500 Torr
1,000 mmHg	1,000 Torr
5,000 mmHg	5,000 Torr

Tips & common mistakes

Quick tips

1 mmHg ≈ 133.32 Pa ≈ 1 Torr.
760 mmHg = 1 atm.
Blood-pressure cuffs display mmHg worldwide.

Avoid these

Confusing mmHg with mmH₂O (different unit, factor of 13.6).
Mixing mmHg with torr in precise vacuum physics — they differ by one part per million.
Writing blood pressure in kPa — use mmHg for medical continuity.

Frequently asked questions

How many torr in a millimeter of mercury?

One millimeter of mercury equals 1 torr.

How do I convert millimeters of mercury to torr?

Multiply the millimeter of mercury value by 1 to get the equivalent in torr.

What is 100 millimeters of mercury in torr?

100 millimeters of mercury equals 100 torr.

Is a millimeter of mercury bigger than a torr?

Yes. 1 millimeter of mercury equals 1 torr, so one millimeter of mercury is larger.

How to convert millimeters of mercury to torr without a calculator?

Multiply by 1 for a quick estimate; use a calculator for precise results.

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