Torr to Millimeters Of Mercury
A torr is approximately the pressure exerted by 1 millimeter of mercury, used in vacuum and lab pressure measurements. Millimeters of mercury measure pressure by how high it pushes a column of mercury, the traditional unit for blood pressure readings. 1 torr equals ≈1 mmHg, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to pressure, measured here against pressure's base unit (Pa) — every other pressure unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
mmHg = torr × ≈1
torr = mmHg × ≈1
Worked example: 5 torr × ≈1 = ≈5 mmHg.
Conversion table
| Torr (torr) | Millimeter of Mercury (mmHg) |
|---|---|
| 1 torr | ≈1 mmHg |
| 2 torr | ≈2 mmHg |
| 3 torr | ≈3 mmHg |
| 5 torr | ≈5 mmHg |
| 10 torr | ≈10 mmHg |
| 20 torr | ≈20 mmHg |
| 25 torr | ≈25 mmHg |
| 50 torr | ≈50 mmHg |
| 100 torr | ≈100 mmHg |
| 250 torr | ≈250 mmHg |
| 500 torr | ≈500 mmHg |
| 1,000 torr | ≈1,000 mmHg |
Frequently asked
- How many Millimeters of Mercury in a torr?
- 1 torr equals ≈1 mmHg.
- How do I convert Torr to Millimeters of Mercury?
- Multiply the value in torr by ≈1 to get mmHg. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Torr and Millimeter of Mercury are both defined by a fixed conversion factor to pressure's base unit (Pa), so the result shown is exact to the precision displayed, not an approximation.