Torrs to mmHg Converter
One Torr equals 1 mmHg (1 torr = 1 mmHg). Multiply a Torr value by 1 to get the equivalent in mmHg. The calculator is above; the formula and worked examples are below.
Formula
mmHg = torr × 1
Multiply the Torr value by 1 to get the equivalent value in mmHg.
Example Conversions
1 Torr (torr)
1 mmHg (mmHg)
5 Torr (torr)
5 mmHg (mmHg)
10 Torr (torr)
10 mmHg (mmHg)
25 Torr (torr)
25 mmHg (mmHg)
100 Torr (torr)
100 mmHg (mmHg)
Conversion Table
| Torr (torr) | mmHg (mmHg) |
|---|---|
| 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 Torr values to mmHg without the calculator.
- Write down the value in Torr (torr) that you want to convert.
- Multiply that value by 1.
- For example, 10 Torrs × 1 = 10 mmHg.
- Label the result as mmHg (mmHg).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Torr and one mmHg.
About Torr and 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. 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. One Torr equals 1 mmHg (1 torr = 1 mmHg). Torr is used in vacuum systems and coating and in laboratory low-pressure work. mmHg is used in blood pressure readings.
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.
Use the pressure conversion guide to compare mmHg, mbar, inHg, kPa, Pa, and torr across medical, weather, aviation, vacuum, and engineering work.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15Torrs equals15mmHg.
15 torr × 1 = 15 mmHg
FAQ
How do I convert Torr to mmHg?
Multiply the Torr value by 1 to get the equivalent value in mmHg.
What is the formula for Torr to mmHg?
The formula is mmHg = torr × 1.
How many mmHg are in 1 Torr?
1 Torr equals 1 mmHg.
Can I convert mmHg back to Torr?
Yes. 1 mmHg equals 1 Torr, and the related converter can reverse the calculation.
What are common names for Torr and mmHg?
Torr is shown as torr and may also be searched as torrs. mmHg is shown as mmHg and may also be searched as millimeters of mercury, mm Hg.
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