Convert Torr (Torr) to KPa
1 torr equals 0.133322 kPa.
Torr to KPa Converter
How to Convert Torr to KPa
1 torr = 0.133322 kPa
KPa = Torr × 0.133322
Example: 1 Torr × 0.133322 = 0.133322 kPa
Reverse Conversion
To convert kPa back to torr:
- Remember, 1 kPa equals 7.50062 torr.
- To convert 0.133322 kPa to Torr, multiply
0.133322 x 7.50062, resulting in1 Torr.
Torr to kPa Conversion Table
Reference table with common torr to kpa conversions. All values calculated with high precision.
Torr to KPa Table
0.001 to 5
Torr to KPa Table
10 to 1000000
KPa to Torr Table
0.0001 to 12
KPa to Torr 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
Definition of KPa
Kilopascal: A Practical SI Pressure Unit
The kilopascal (kPa) is an SI-derived unit of pressure equal to 1,000 pascals. It provides a more practical scale than the pascal for many everyday and industrial applications. The kilopascal is commonly used for tire pressure specifications (especially outside North America), blood pressure measurements in some countries, and weather reports in metric countries.
Conversions to Other Units of Measurement:
- Pascal (Pa): 1 kilopascal equals exactly 1,000 pascals. This is the fundamental relationship. For example, atmospheric pressure (101.325 kPa) equals 101,325 Pa.
- Bar: 1 kilopascal equals exactly 0.01 bar. This simple conversion makes kPa convenient for calculations. For example, 250 kPa equals 2.5 bar.
- PSI: 1 kilopascal equals approximately 0.145038 psi. This conversion is important for automotive applications. For example, a tire specification of 220 kPa equals approximately 32 psi.
- Atmosphere (atm): 1 kilopascal equals approximately 0.00986923 atm. Standard atmospheric pressure equals 101.325 kPa.
- Millibar (mbar): 1 kilopascal equals exactly 10 millibar. This conversion is used in meteorology.
The kilopascal offers a good balance between the small pascal and larger units, making it ideal for many practical pressure measurements.
- Definition
- SI-derived pressure unit equal to 1,000 pascals (10³ Pa).
- Exact factor
- 1 kPa = 1,000 Pa (exact); 1 kPa = 0.01 bar (exact)
- Common equivalents
- 1 kPa = 10 mbar (exact)
- 1 kPa ≈ 0.145038 psi
- 101.325 kPa = 1 atm (exact)
- 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 KPa
Facts & Uses
- 1 kPa = 1000 Pa exactly. The most practical metric unit for everyday pressures: tire pressure, blood pressure, weather, and engineering.
- Standard for tire pressure in metric markets — typical car tire is 200-250 kPa (≈ 30-36 psi).
- Blood pressure can be expressed in kPa: 16/10.7 kPa ≈ 120/80 mmHg (the international SI standard, though clinicians still prefer mmHg).
- Weather: standard atmospheric pressure is 101.325 kPa; storm warnings often start below 100 kPa at sea level.
Curiosities
- Kilopascals are preferred over hectopascals in engineering and tire-pressure contexts because the round numbers are more intuitive (250 kPa vs 2500 hPa).
- The kilopascal replaced the kilogram-force per square centimeter (kgf/cm²) in most international standards after metrication in the 1970s-80s.
- A 10 kPa pressure differential is roughly the suction force of a typical household vacuum cleaner.
- Approximate equivalents: 100 kPa ≈ 14.5 psi ≈ 0.987 atm ≈ 750 mmHg.
Sources
Frequently Asked Questions
How many kPa are in one torr?
One torr equals 0.133322 kPa. To convert, multiply the torr value by 0.133322. For the reverse, divide the kPa value by 0.133322 (or multiply by 7.50062).
What is 100 torr in kPa?
100 torr = 13.332 kPa. This is one of the most commonly searched conversions for this pair.
How precise is the torr-to-kPa conversion?
The factor 0.133322 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.
Looking for the reverse? Convert KPa to Torr
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