Torr to Kilopascals (Torr to kPa)
1 torr equals 0.1333223684 kilopascals (rounded).
How to convert torr to kilopascals
To convert torr to kilopascals, multiply the number of torr by 0.1333223684. The factor is rounded to 10 significant digits. To go the other way, multiply kilopascals by 7.500616827 (rounded).
kilopascals = torr × 0.1333223684
Example: 10 torr = 1.333223684 kilopascals.
About these units
Torr (Torr)
Exactly 1/760 of a standard atmosphere (about 133.322 Pa), named after Evangelista Torricelli. Used for vacuum measurement.
In 1643 Evangelista Torricelli filled a meter-long tube, sealed at one end, with mercury and stood it in a basin of mercury. The column fell to about 76 cm and left a Torricellian vacuum above it, the first recorded creation of a permanent vacuum. In a letter dated 11 June 1644 he described living at the bottom of a sea of air, an idea that also explained why suction pumps could raise water only about 10 meters.
The torr honors him. It was originally meant to equal one millimeter of mercury at 0 degrees Celsius, but the weight of a mercury column varies with gravity, which changes with elevation and latitude. In 1954 the 10th CGPM defined the standard atmosphere as 101,325 Pa, and the torr was then fixed as exactly one 760th of that, about 133.32 Pa.
Today the torr is mostly met in high-vacuum physics and engineering. It differs from the millimeter of mercury by less than one part in seven million, so the two are interchangeable except in the most exacting work.
1 torr = 133.3223684 pascals (approximately).
Sources: Wikipedia: Torr; Wikipedia: Evangelista Torricelli; Wikipedia: Standard atmosphere (unit)
Kilopascal (kPa)
1,000 pascals. Used for tire pressures, weather reports in many countries and engineering.
Kilopascal is the form of the pascal that most people actually use. The pascal itself is very small, so outside meteorology the kilopascal became the common choice in most fields, and it equals one centibar. Medical elastography reports tissue stiffness in kPa, and Canada reports atmospheric pressure in kPa rather than hectopascals.
A standard atmosphere is 101.325 kPa. In 1982 IUPAC recommended a different reference for chemistry, a standard pressure of exactly 100 kPa, which split the older convention of 1 atm into two competing standards.
Blood pressure shows how the units line up. One mmHg is 0.13332 kPa, and a normal reading is below about 16.0 kPa systolic and 10.7 kPa diastolic, the same thing as the familiar 120 over 80 in millimeters of mercury.
1 kilopascal = 1,000 pascals (exactly).
Sources: Wikipedia: Pascal (unit); Wikipedia: Standard atmosphere (unit); Wikipedia: Millimetre of mercury
Related conversions
- Kilopascals to torr (reverse)
- Torr to pascals
- Torr to bars
- Torr to standard atmospheres
- Torr to PSI
- Torr to hectopascals
- Torr to megapascals
- Torr to millibars
- Torr to millimeters of mercury
- Torr to inches of mercury
- Pascals to kilopascals
- Bars to kilopascals
- Standard atmospheres to kilopascals
- PSI to kilopascals
- Hectopascals to kilopascals
- Megapascals to kilopascals
- Millibars to kilopascals
- Millimeters of mercury to kilopascals
- Inches of mercury to kilopascals
- Gigapascals to kilopascals
- Kilopounds per square inch to kilopascals
- Millimeters of water to kilopascals
See all pressure units.