Convert Torr (Torr) to Pascals (Pa)
1 torr equals 133.322 pascals.
Torr to Pascal Converter
How to Convert Torr to Pascal
1 torr = 133.322 pascals
Pascal = Torr × 133.322
Example: 1 Torr × 133.322 = 133.322 Pa
Reverse Conversion
To convert pascals back to torr:
- Remember, 1 pascal equals 0.00750062 torr.
- To convert 133.322 Pa to Torr, multiply
133.322 x 0.00750062, resulting in1 Torr.
Torr to pascals Conversion Table
Reference table with common torr to pascals conversions. All values calculated with high precision.
Torr to Pascals Table
0.0001 to 12
Torr to Pascals Table
1 to 100000
Pascals to Torr Table
0.1 to 500
Pascals to Torr Table
1000 to 1 × 108
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
Definition of Pascal
Pascal: The SI Unit of Pressure
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square meter (N/m²). Named after the French mathematician and physicist Blaise Pascal, it is used extensively in scientific, engineering, and meteorological applications. The pascal is a relatively small unit, so larger multiples like kilopascal (kPa) and megapascal (MPa) are commonly used in practice.
Conversions to Other Units of Measurement:
- Bar: 1 pascal equals 0.00001 bar (or 1 bar = 100,000 Pa). This conversion is frequently used in industrial applications. For example, standard atmospheric pressure (101,325 Pa) equals approximately 1.01325 bar.
- PSI (Pound per Square Inch): 1 pascal equals approximately 0.000145038 psi. This conversion is essential for interfacing with equipment using imperial measurements. For example, 100,000 Pa equals approximately 14.5 psi.
- Atmosphere (atm): 1 pascal equals approximately 9.8692×10⁻⁶ atm. Standard atmospheric pressure is defined as exactly 101,325 Pa or 1 atm.
- Torr: 1 pascal equals approximately 0.00750062 torr. This conversion is commonly used in vacuum technology. For example, 133.322 Pa equals 1 torr.
- Millibar (mbar): 1 pascal equals 0.01 millibar. This conversion is frequently used in meteorology. For example, standard atmospheric pressure equals 1013.25 mbar.
The pascal is fundamental to pressure measurement, providing a standardized unit for scientific calculations and engineering specifications.
- Definition
- SI derived unit of pressure equal to one newton per square meter (N/m²).
- Exact factor
- 1 Pa = 1 N/m² = 1 kg/(m·s²) (exact)
- Common equivalents
- 1 Pa = 0.00001 bar (exact)
- 1 Pa = 0.01 mbar (exact)
- 1 Pa ≈ 0.000145038 psi
- 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
About the Pascal
Facts & Uses
- SI derived unit of pressure: 1 Pa = 1 N/m². Named after Blaise Pascal (1623-1662), the French mathematician and physicist.
- Universal in scientific publications, weather data (hectopascals on barometric charts), and engineering specifications.
- The pascal is a very small unit for everyday pressures — atmospheric pressure is ~101,325 Pa, so weather forecasts use hectopascals (hPa) or kilopascals (kPa).
- Used in fluid mechanics, vacuum measurements, materials science (stress and strain), and tire pressure in metric markets.
Curiosities
- The pascal was adopted as the SI unit of pressure at the 14th CGPM in 1971, replacing the older mechanical units like dyne/cm² (CGS) and lbf/in² (imperial).
- 1 Pa is roughly the pressure exerted by a thin layer of paper resting on a tabletop — about 0.0000099 atmospheres.
- The millibar (mbar), traditionally used in meteorology, equals exactly 1 hPa (100 Pa). Most modern weather services have switched to hPa for SI compatibility.
- Approximate equivalents: 1 Pa ≈ 0.000145 psi; 1 atm = 101,325 Pa = 1013.25 hPa = 14.696 psi.
Sources
Frequently Asked Questions
How many pascals are in one torr?
One torr equals 133.322 pascals. To convert, multiply the torr value by 133.322. For the reverse, divide the pascal value by 133.322 (or multiply by 0.00750062).
What is 1100 torr in pascals?
1100 torr = 146650 pascals. This is one of the most commonly searched conversions for this pair.
How precise is the torr-to-pascal conversion?
The factor 133.322 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.
Looking for the reverse? Convert Pascal to Torr
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