mmHg to Torr Converter
One mmHg equals 1 Torr (1 mmHg = 1 torr). Multiply a mmHg value by 1 to get the equivalent in Torr. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
torr = mmHg × 1
Multiply the mmHg value by 1 to get the equivalent value in Torr.
Example Conversions
1 mmHg (mmHg)
1 Torr (torr)
5 mmHg (mmHg)
5 Torr (torr)
10 mmHg (mmHg)
10 Torr (torr)
25 mmHg (mmHg)
25 Torr (torr)
100 mmHg (mmHg)
100 Torr (torr)
Conversion Table
| mmHg (mmHg) | Torr (torr) |
|---|---|
| 0.1 | 0.1 |
| 0.5 | 0.5 |
| 1 | 1 |
| 2 | 2 |
| 5 | 5 |
| 10 | 10 |
| 25 | 25 |
| 50 | 50 |
| 100 | 100 |
| 250 | 250 |
| 500 | 500 |
| 1000 | 1000 |
How to Convert Manually
Use these steps to convert mmHg values to Torr without the calculator.
- Write down the value in mmHg (mmHg) that you want to convert.
- Multiply that value by 1.
- For example, 10 mmHg × 1 = 10 Torr.
- Label the result as Torr (torr).
Relative Size Comparison
This chart shows the visual difference in size between exactly one mmHg and one Torr.
About mmHg and Torr
The millimeter of mercury is about 133.322 pascals — the height a pressure pushes a mercury column. Blood pressure worldwide is still reported in mmHg. The torr is exactly 1/760 of a standard atmosphere, about 133.32 pascals, named after Torricelli. Vacuum technology and laboratory work specify low pressures in torr. One mmHg equals 1 Torr (1 mmHg = 1 torr). mmHg to Torr conversion comes up most often in blood pressure readings and in medical vacuum and ventilation, typically when figures need restating for vacuum systems and coating.
Precision and Rounding: Several pressure factors are exact by definition (1 atm = 101,325 Pa; 1 bar = 100,000 Pa) while others, like psi and mmHg, are derived and carry long decimals. Tire and weather readings tolerate whole-number rounding; calibration, medicine, and process engineering need the full factor before rounding.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 mmHg equals 15 Torr.
15 mmHg × 1 = 15 torr
FAQ
How do I convert mmHg to Torr?
Multiply the mmHg value by 1 to get the equivalent value in Torr.
What is the formula for mmHg to Torr?
The formula is torr = mmHg × 1.
How many Torr are in 1 mmHg?
1 mmHg equals 1 Torr.
Can I convert Torr back to mmHg?
Yes. 1 Torr equals 1 mmHg, and the related converter can reverse the calculation.
What are common names for mmHg and Torr?
mmHg is shown as mmHg and may also be searched as millimeters of mercury, mm Hg. Torr is shown as torr and may also be searched as torrs.
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