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Accurate pressure conversion tool for torr and pascals
Convert torr to pascals instantly with precise calculations. Supports bidirectional conversion with a full pressure unit breakdown including kPa, MPa, atm, bar, mmHg, and psi — updated for 2026.
Professional pressure conversion for vacuum systems, science, medicine, and engineering
Convert torr to pascals using the exact factor of 133.32236842105 Pa per torr — derived from the definition of standard atmosphere (101,325 Pa = 760 Torr). Our converter delivers full-precision results for any pressure value, from sub-millitorr vacuum readings to thousands of torr used in industrial pressure systems.
Switch instantly between torr to pascals and pascals to torr modes. Results include a complete eight-unit pressure breakdown — pascals, kilopascals, megapascals, torr, millimetres of mercury (mmHg), atmospheres, bar, and psi — calculated simultaneously from a single input value for maximum usefulness.
The torr to pascals converter is essential for vacuum engineering, physics laboratory work, meteorology, medical blood pressure conversion, industrial process control, and semiconductor manufacturing. Anywhere vacuum or low-pressure systems are measured in torr and SI values are required in pascals, this tool provides reliable, instant conversions every time.
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The torr (Torr) is a non-SI unit of pressure named after the Italian physicist and mathematician Evangelista Torricelli (1608–1647), who invented the barometer in 1643. One torr is defined as exactly 1/760 of a standard atmosphere — that is, the pressure exerted by a 1 mm column of mercury at 0 °C under standard gravity. The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre, and is used universally in science, engineering, and international standards.
The exact conversion factor is 1 Torr = 101,325 ÷ 760 = 133.32236842105… Pa. This is an exact, repeating rational number derived directly from the internationally defined standard atmosphere (101,325 Pa) and the definition of the torr (1/760 atm). The torr and millimetre of mercury (mmHg) are very nearly equal but not identical — they differ by approximately 0.000015%, a distinction that matters only in the highest-precision scientific measurements.
760 Torr = 1 atm = 101,325 Pa | 1 Torr = 101,325 ÷ 760 = 133.3224 Pa
Use this quick-reference table to find common torr to pascals conversions instantly. All values use the exact factor: 1 Torr = 133.32236842105 Pa.
| Torr | Pascals (Pa) | Kilopascals (kPa) | Atmospheres (atm) | Bar |
|---|---|---|---|---|
| 0.1 Torr | 13.332 Pa | 0.013332 kPa | 0.0001316 atm | 0.0001333 bar |
| 1 Torr | 133.322 Pa | 0.133322 kPa | 0.0013158 atm | 0.0013332 bar |
| 5 Torr | 666.611 Pa | 0.666611 kPa | 0.006579 atm | 0.006666 bar |
| 10 Torr | 1,333.22 Pa | 1.33322 kPa | 0.013158 atm | 0.013332 bar |
| 25 Torr | 3,333.06 Pa | 3.33306 kPa | 0.032895 atm | 0.033331 bar |
| 50 Torr | 6,666.12 Pa | 6.66612 kPa | 0.065789 atm | 0.066661 bar |
| 100 Torr | 13,332.24 Pa | 13.33224 kPa | 0.131579 atm | 0.133322 bar |
| 200 Torr | 26,664.47 Pa | 26.66447 kPa | 0.263158 atm | 0.266645 bar |
| 380 Torr | 50,662.50 Pa | 50.66250 kPa | 0.500000 atm | 0.506625 bar |
| 500 Torr | 66,661.18 Pa | 66.66118 kPa | 0.657895 atm | 0.666612 bar |
| 760 Torr | 101,325.00 Pa | 101.325 kPa | 1.000000 atm | 1.01325 bar |
| 1,000 Torr | 133,322.37 Pa | 133.322 kPa | 1.315789 atm | 1.333224 bar |
Converting torr to pascals requires a single multiplication step. The conversion factor is exact and derived from internationally defined pressure standards — no approximation is involved.
The torr and millimetre of mercury (mmHg) are often used interchangeably but are technically different units. 1 Torr = 133.32236842105 Pa exactly (defined as 1/760 atm). 1 mmHg = 133.322387415 Pa (based on physical properties of mercury). The difference is about 0.000015% — negligible for clinical blood pressure measurements but relevant in high-precision vacuum science. This converter uses the exact torr definition throughout.
The torr to pascals converter is widely used across science, engineering, and medicine, as the torr remains a standard unit in several specialist fields despite the SI system's adoption of the pascal as the preferred pressure unit globally.
Vacuum systems in physics and chemistry laboratories are routinely characterised in torr — from rough vacuum (760–1 Torr) to ultra-high vacuum (below 10⁻⁹ Torr). Converting these readings to pascals is necessary for scientific publications, equipment specifications, and comparison with SI-standard instruments and pressure gauges.
Blood pressure is traditionally measured in mmHg (essentially identical to torr), while modern medical equipment may display readings in kilopascals. Converting between torr and pascals is necessary for clinical reporting, patient record systems that use SI units, and for comparing blood pressure values with WHO international health guidelines.
Atmospheric pressure measurements in weather science are often reported in millibars or hectopascals internationally, but historical datasets and some legacy instruments still use torr or mmHg. Accurate torr-to-pascal conversion is essential for merging historical weather records with modern SI-standard atmospheric science databases.
Chemical vapour deposition (CVD), physical vapour deposition (PVD), and plasma etching processes in semiconductor fabrication operate at precisely controlled pressures measured in millitorr and torr. Process engineers must convert these values to pascals for equipment calibration, safety compliance documentation, and international equipment standards.
Altitude-dependent atmospheric pressure models used in aviation and aerospace engineering express pressure at high altitudes in both torr (for vacuum system reference) and pascals (for structural load and aerodynamic calculations). Converting between these units ensures consistency across simulation software, flight test data, and international safety standards.
University physics and chemistry courses — particularly in gas laws, thermodynamics, and physical chemistry — include torr as a standard pressure unit alongside pascals and atmospheres. Students frequently need to convert between torr and pascals for Boyle's Law, ideal gas law, and vapour pressure calculations throughout their coursework and laboratory reports.
The conversion factor of 133.32236842105… Pa per torr is derived directly from two internationally defined pressure standards. The standard atmosphere is defined as exactly 101,325 Pa. The torr is defined as exactly 1/760 of one standard atmosphere. Dividing these: 101,325 ÷ 760 = 133.322368421052… — a repeating decimal that is an exact rational number.
Because both the pascal value of the standard atmosphere (101,325 Pa) and the torr's fraction of that atmosphere (1/760) are exact international definitions, the torr-to-pascal conversion factor is also an exact rational number — not a rounded approximation. This precision is critical in vacuum science and medical instrumentation, where pressure values spanning many orders of magnitude must be expressed accurately in both torr and SI units.
Master the full pressure unit system — pascals, atmospheres, bar, torr, and psi — with exact conversion factors and real-world reference pressures. Learn how SI and non-SI pressure units relate and how to convert between them confidently for engineering, science, and everyday applications.
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