Convert Millitorrs to Torr (Torr)
1 millitorr equals 0.0700846 torr.
Millitorr to Torr Converter
How to Convert Millitorr to Torr
1 millitorr = 0.0700846 torr
Torr = Millitorr × 0.0700846
Example: 1 millitorr × 0.0700846 = 0.0700846 Torr
Reverse Conversion
To convert torr back to millitorrs:
- Remember, 1 torr equals 14.2685 millitorrs.
- To convert 0.0700846 Torr to millitorr, multiply
0.0700846 x 14.2685, resulting in1 millitorr.
Common Millitorr to Torr Conversions
| Millitorr | Torr | Actions |
|---|---|---|
| 1 millitorr | 0.0700846 torr | |
| 5 millitorrs | 0.350423 torr | |
| 10 millitorrs | 0.700846 torr | |
| 25 millitorrs | 1.75212 torr |
| Millitorr | Torr | Actions |
|---|---|---|
| 50 millitorrs | 3.50423 torr | |
| 100 millitorrs | 7.00846 torr | |
| 500 millitorrs | 35.0423 torr | |
| 1000 millitorrs | 70.0846 torr |
Millitorrs to torr Conversion Table
Reference table with common millitorrs to torr conversions. All values calculated with high precision.
Millitorrs to Torr Table
0.01 to 50
Millitorrs to Torr Table
100 to 10000000
Torr to Millitorrs Table
0.0001 to 12
Torr to Millitorrs Table
1 to 100000
Definition of Torr
Torr: The Vacuum Technologist's Unit
The torr is a unit of pressure named after the Italian physicist Evangelista Torricelli, inventor of the barometer. One torr is defined as exactly 1/760 of a standard atmosphere (101,325/760 Pa ≈ 133.322 Pa). The torr is widely used in vacuum technology, physics laboratories, and high-vacuum applications where precise low-pressure measurements are needed.
Conversions to Other Units of Measurement:
- Atmosphere (atm): 1 torr equals exactly 1/760 atm. By definition, 760 torr equals exactly 1 standard atmosphere.
- Pascal (Pa): 1 torr equals approximately 133.322 pascals. This converts vacuum readings to SI units.
- Millibar (mbar): 1 torr equals approximately 1.33322 mbar. This conversion is useful for relating vacuum levels to atmospheric measurements.
- Millimeter of Mercury (mmHg): 1 torr is very close to 1 mmHg (they differ by about 0.000015%). For practical purposes, they are often used interchangeably.
- Micron (μm Hg or mTorr): 1 torr equals 1,000 millitorr (mTorr) or microns. This is commonly used for high-vacuum measurements.
The torr provides a convenient scale for vacuum measurements, where typical applications range from rough vacuum (760-1 torr) to high vacuum (10⁻³-10⁻⁹ torr).
- Definition
- Pressure unit equal to exactly 1/760 of a standard atmosphere.
- Exact factor
- 1 Torr = 101,325/760 Pa = 133.32236842... Pa
- Common equivalents
- 760 Torr = 1 atm (exact by definition)
- 1 Torr ≈ 1 mmHg
- 1 Torr ≈ 1.33322 mbar
- Sources
About the Torr
Facts & Uses
- 1 torr = 1/760 of a standard atmosphere exactly = 101325/760 Pa ≈ 133.322 Pa. Numerically equal to 1 mmHg under standard conditions.
- Named after Evangelista Torricelli (1608-1647), the inventor of the mercury barometer in 1643.
- Standard in vacuum technology: ultra-high vacuum systems measured in milli-torr or micro-torr; semiconductor manufacturing uses torr for chamber pressures.
- Still common in medical contexts for blood pressure (interchangeable with mmHg) and partial pressures of gases in respiratory physiology.
Curiosities
- The torr is essentially equivalent to mmHg at standard conditions, but the torr is defined exactly while mmHg depends on mercury density and gravity.
- Torricelli's 1643 experiment was the first scientific demonstration of atmospheric pressure — a glass tube filled with mercury inverted into a basin showed the column standing at ~760 mm.
- A perfect vacuum would be 0 torr; the lowest practical vacuum in commercial systems is about 10⁻¹¹ torr — used in surface science and accelerators.
- Approximate equivalents: 760 torr = 1 atm; 1 torr ≈ 133 Pa ≈ 0.0193 psi.
Sources
Frequently Asked Questions
How many torr are in one millitorr?
One millitorr equals 0.0700846 torr. To convert, multiply the millitorr value by 0.0700846. For the reverse, divide the torr value by 0.0700846 (or multiply by 14.2685).
What is 100 millitorrs in torr?
100 millitorrs = 7.0085 torr. This is one of the most commonly searched conversions for this pair.
How precise is the millitorr-to-torr conversion?
The factor 0.0700846 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.
Looking for the reverse? Convert Torr to Millitorr
Related Pressure Converters
Explore other pressure conversion tools:
