Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 133.322 |
| kPa | Kilopascal | 0.133322 |
| bar | Bar | 0.00133322 |
| atm | Atmosphere | 0.0013157858 |
| psi | PSI | 0.019336714 |
| inHg | Inch of Mercury | 0.039369949 |
Formula: Bar = Torr × 0.001333
Multiply any torr value by 0.001333 to get bar.
Reverse: Torr = Bar × 750.1
Common torr values — factor: 1 Torr = 0.001333 bar
| Torr (Torr) | Bar (bar) | Context |
|---|---|---|
| 0.001 Torr | 1.333e-06 bar | Ultra-high vacuum |
| 0.01 Torr | 1.333e-05 bar | High vacuum |
| 0.1 Torr | 0.0001333 bar | Medium vacuum |
| 1 Torr | 0.001333 bar | Low vacuum |
| 10 Torr | 0.01333 bar | Rough vacuum |
| 100 Torr | 0.1333 bar | Near-vacuum |
| 760 Torr | 1.013 bar | 1 atm / sea level |
| 1,000 Torr | 1.333 bar | Slight above atm |
| 7,600 Torr | 10.13 bar | 10 atm |
| 1e+04 Torr | 13.33 bar | 100 mbar |
| 7.6e+04 Torr | 101.3 bar | 100 atm |
| 100,000 Torr | 133.3 bar | 1.3 atm |
| 760,000 Torr | 1,013 bar | 1,000 atm |
| 1,000,000 Torr | 1,333 bar | High pressure |
| 10,000,000 Torr | 1.333e+04 bar | Very high |
1 Torr = 0.001333 bar. Memorize for instant estimates.
Use 0.0013 as a quick mental multiplier.
Multiply result by 750.1 to recover the original Torr value.
Monitors dive cylinder pressure in bar — standard in most of the world (200–300 bar).
Reads surface pressure maps in millibar (1 mbar = 0.001 bar) for weather forecasting.
Designs European hydraulic systems — pumps and actuators are rated in bar.
Controls fermentation vessel pressure (1–3 bar) and carbonation pressures in bar.
Specifies pipeline operating pressures and safety relief settings in bar.
Monitors tire pressure and boost pressure on turbocharged engines in bar.
The torr was named after Evangelista Torricelli, who invented the mercury barometer in 1644. One torr is defined as 1/760 of standard atmospheric pressure (133.322 Pa), and is equal to 1 mmHg at 0°C.
Torr is the standard pressure unit in vacuum science and semiconductor manufacturing. High vacuum systems operate at 10⁻³ to 10⁻⁷ torr. Ultra-high vacuum (used in particle accelerators) reaches below 10⁻¹⁰ torr.
Interesting fact: Torricelli's original barometer experiment used a 1-meter tube of mercury that settled at 760 mm above the reservoir — directly defining the unit that would later bear his name.
The bar is a metric unit of pressure equal to exactly 100,000 pascals — very close to standard atmospheric pressure (1 atm = 1.01325 bar). It was introduced in 1909 and is widely used in Europe for weather forecasting, diving, and industrial applications.
Scuba diving cylinders are filled to 200–300 bar. Automotive tire pressure gauges often display in bar across Europe. Industrial compressors and hydraulic systems are commonly rated in bar.
Interesting fact: The millibar (mbar = hPa) is the standard unit for atmospheric pressure in meteorology worldwide. Standard sea-level atmospheric pressure is 1013.25 mbar.
Converting torr to bar is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 Torr = 0.006666 bar and 10 Torr = 0.01333 bar. For the reverse: 1 bar = 750.1 Torr. The exact factor is 1 Torr = 0.001333 bar.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.