Torr to Millimetres of mercury
Type a value in Torr and get the result in Millimetres of mercury, calculated exactly.
1 Torr ≈ 0.9999998575 Millimetres of mercury
Precision
Conventional factorRounded for display to about 10 significant digits.
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Formula
mmHg = Torr × 0.999999857534
To convert Torr to Millimetres of mercury, multiply the value by 0.999999857534.
Worked examples
- 1 Torr × 0.999999857534 ≈ 0.9999998575 mmHg
- 100 Torr × 0.999999857534 ≈ 99.99998575 mmHg
- 50 Torr × 0.999999857534 ≈ 49.99999288 mmHg
This factor rests on a conventional or rounded value.
Conversion table
| Torr (Torr) | Millimetres of mercury (mmHg) |
|---|---|
| 1 | ≈ 0.9999999 |
| 2 | ≈ 2 |
| 3 | ≈ 3 |
| 4 | ≈ 3.999999 |
| 5 | ≈ 4.999999 |
| 6 | ≈ 5.999999 |
| 7 | ≈ 6.999999 |
| 8 | ≈ 7.999999 |
| 9 | ≈ 8.999999 |
| 10 | ≈ 9.999999 |
| 15 | ≈ 15 |
| 20 | ≈ 20 |
| 25 | ≈ 25 |
| 30 | ≈ 30 |
| 40 | ≈ 39.99999 |
| 50 | ≈ 49.99999 |
| 60 | ≈ 59.99999 |
| 70 | ≈ 69.99999 |
| 75 | ≈ 74.99999 |
| 80 | ≈ 79.99999 |
| 90 | ≈ 89.99999 |
| 100 | ≈ 99.99999 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Millimetres of mercury to Torr
| Millimetres of mercury (mmHg) | Torr (Torr) |
|---|---|
| 1 | ≈ 1 |
| 2 | ≈ 2 |
| 3 | ≈ 3 |
| 4 | ≈ 4.000001 |
| 5 | ≈ 5.000001 |
| 6 | ≈ 6.000001 |
| 7 | ≈ 7.000001 |
| 8 | ≈ 8.000001 |
| 9 | ≈ 9.000001 |
| 10 | ≈ 10 |
| 15 | ≈ 15 |
| 20 | ≈ 20 |
| 25 | ≈ 25 |
| 30 | ≈ 30 |
| 40 | ≈ 40.00001 |
| 50 | ≈ 50.00001 |
| 60 | ≈ 60.00001 |
| 70 | ≈ 70.00001 |
| 75 | ≈ 75.00001 |
| 80 | ≈ 80.00001 |
| 90 | ≈ 90.00001 |
| 100 | ≈ 100 |
Unit definitions
- Torr Torr
- Exactly 1/760 of a standard atmosphere.
- Millimetres of mercury mmHg
- The conventional value of 133.322387415 pascals, used for blood pressure.
Questions people ask
Torr to Millimetres of mercury: what is the conversion factor?
One Torr is ≈ 0.9999998575 mmHg.
How do I convert Torr to Millimetres of mercury?
Use the formula above. For example, 100 Torr = ≈ 99.99998575 mmHg.
Is the conversion exact?
Very nearly. One of the units is based on a conventional or rounded value, so treat the result as a close approximation.
Factors checked 19 October 2026.