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torr (torr) to bar (bar) conversion

torr to bar conversion table

torr (torr)bar (bar)
00
10.001333223684211
20.002666447368421
30.003999671052632
40.005332894736842
50.006666118421053
60.007999342105263
70.009332565789474
80.01066578947368
90.01199901315789
100.01333223684211
200.02666447368421
300.03999671052632
400.05332894736842
500.06666118421053
600.07999342105263
700.09332565789474
800.1066578947368
900.1199901315789
1000.1333223684211
10001.3332236842105

How to convert torr to bar?

Torr and bar are both units of pressure, but they belong to different systems. Understanding their relationship is crucial in various scientific and engineering applications. This section will detail how to convert between these units.

Understanding Torr and Bar

  • Torr: Named after Evangelista Torricelli, the inventor of the barometer, torr is a unit of pressure commonly used in vacuum technology and related fields. It is defined as 1/760 of standard atmospheric pressure.
  • Bar: A bar is defined as exactly 10510^5 Pascals (Pa). It is widely used in meteorology and industrial processes.

Conversion Formula

The conversion between torr and bar relies on the following relationship:

1 bar=750.061683 torr1 \text{ bar} = 750.061683 \text{ torr}

This can also be expressed as:

1 torr≈0.00133322 bar1 \text{ torr} \approx 0.00133322 \text{ bar}

Converting Torr to Bar

To convert from torr to bar, multiply the pressure in torr by the conversion factor 0.001333220.00133322.

Example: Convert 1 torr to bar:

1 torr×0.00133322bartorr=0.00133322 bar1 \text{ torr} \times 0.00133322 \frac{\text{bar}}{\text{torr}} = 0.00133322 \text{ bar}

Therefore, 1 torr is approximately 0.00133322 bar.

Converting Bar to Torr

To convert from bar to torr, multiply the pressure in bar by the conversion factor 750.061683750.061683.

Example: Convert 1 bar to torr:

1 bar×750.061683torrbar=750.061683 torr1 \text{ bar} \times 750.061683 \frac{\text{torr}}{\text{bar}} = 750.061683 \text{ torr}

Therefore, 1 bar is approximately 750.061683 torr.

Real-World Examples

  1. Meteorology: Atmospheric pressure is often measured in millibars (mbar), where 1 bar = 1000 mbar. You might need to convert these values to torr for scientific analysis or when using equipment calibrated in torr.

    Example: If atmospheric pressure is 1013 mbar, that's 1.013 bar. Converting to torr: 1.013 bar×750.061683torrbar≈760 torr1.013 \text{ bar} \times 750.061683 \frac{\text{torr}}{\text{bar}} \approx 760 \text{ torr} This is approximately standard atmospheric pressure.

  2. Vacuum Systems: In laboratory settings or industrial processes involving vacuum systems, pressure is often measured in torr. Converting to bar might be necessary when interfacing with equipment that uses bar as the pressure unit.

    Example: A vacuum chamber operates at 1×10−31 \times 10^{-3} torr. Converting to bar: 1×10−3 torr×0.00133322bartorr=1.33322×10−6 bar1 \times 10^{-3} \text{ torr} \times 0.00133322 \frac{\text{bar}}{\text{torr}} = 1.33322 \times 10^{-6} \text{ bar}

  3. Diving: Divers use bar to measure underwater pressure. Converting to torr may be necessary if using instruments calibrated differently.

    Example: At a depth where the pressure is 3 bar: 3 bar×750.061683torrbar≈2250 torr3 \text{ bar} \times 750.061683 \frac{\text{torr}}{\text{bar}} \approx 2250 \text{ torr}

Historical Context

Evangelista Torricelli (1608-1647) was an Italian physicist and mathematician, best known for his invention of the barometer in 1643. His experiments with mercury-filled tubes led to the realization that atmospheric pressure could be measured, revolutionizing our understanding of weather and fluid dynamics. The "torr" unit was later named in his honor to recognize his contributions.

Base 10 vs Base 2

The conversion between torr and bar is independent of base 10 (decimal) or base 2 (binary) systems, as it relies on fixed physical definitions. There is no difference in the conversion factor whether you are using a base-10 or base-2 representation of numbers.

See below section for step by step unit conversion with formulas and explanations. Please refer to the table below for a list of all the bar to other unit conversions.

What is torr?

Torr is a unit of pressure measurement commonly used in vacuum applications. Let's delve into its definition, origin, and relevance.

Definition of Torr

The torr is a unit of pressure defined as 1/760 of standard atmospheric pressure. In other words, 760 torr is approximately equal to one atmosphere (atm).

1 torr≈1760 atm1 \text{ torr} \approx \frac{1}{760} \text{ atm}

It is also nearly equal to one millimeter of mercury (mmHg). More precisely:

1 torr≈1 mmHg1 \text{ torr} \approx 1 \text{ mmHg}

Origin and History

The torr is named after Italian physicist and mathematician Evangelista Torricelli (1608–1647), who invented the barometer in 1643. Torricelli's experiment demonstrated that air pressure could support a column of mercury, paving the way for pressure measurement.

Relation to Pascal (Pa)

The pascal (Pa) is the SI unit of pressure. The relationship between torr and pascal is as follows:

1 torr≈133.322 Pa1 \text{ torr} \approx 133.322 \text{ Pa}

Therefore, to convert from torr to pascals, you can use the formula:

Pressure in Pa=Pressure in torr×133.322\text{Pressure in Pa} = \text{Pressure in torr} \times 133.322

Real-World Examples and Applications

Torr is commonly used in fields that involve vacuum systems, such as:

  • Vacuum pumps: Vacuum pump performance is often rated in torr or millitorr (mTorr). For example, a roughing pump might achieve a vacuum of 10$^{-3}$ torr.
  • Scientific instruments: Mass spectrometers, electron microscopes, and other analytical instruments require high vacuum conditions, often specified in torr or microtorr (µTorr).
  • Semiconductor manufacturing: Vacuum processes, such as chemical vapor deposition (CVD) and sputtering, use vacuum levels measured in torr to control deposition rates and film quality.
  • Space research: Simulating space environments requires extremely low pressures, which are measured in torr or even smaller units like picotorr (pTorr).
  • Vacuum Furnaces: Sintering, brazing, and heat treating of materials at reduced pressures, which improves the properties of the final product.

Interesting Facts

  • While torr and mmHg are often used interchangeably, they are technically slightly different due to variations in the definition of standard gravity.
  • The unit "micron" (µ) is sometimes used as a unit of pressure, where 1 micron = 1 mTorr.
  • The lowest pressure ever achieved in a laboratory setting is on the order of 10−1710^{-17} torr.

What is bar?

The bar is a metric unit of pressure, widely used in science, engineering, and industry. It's a convenient unit because it is close to standard atmospheric pressure on Earth. Below is detailed information about bar, it's origin, and some real-world examples.

Definition of Bar

The bar is defined as exactly 100,000100,000 Pascals (105Pa10^5 Pa). The Pascal (Pa) is the SI unit of pressure, defined as one Newton per square meter (N/m2N/m^2). Therefore:

1 bar=100,000 Pa=105 N/m21 \, bar = 100,000 \, Pa = 10^5 \, N/m^2

Origin and History

The bar was introduced by British physicist Sir Napier Shaw in 1909. The goal was to have a unit of pressure that was close to atmospheric pressure but based on the metric system. The term "bar" comes from the Greek word "βάρος" (baros) meaning "weight."

Relation to Atmospheric Pressure

Standard atmospheric pressure at sea level is approximately 1.013251.01325 bar. Because of this proximity, the bar and millibar (1 mbar = 0.001 bar) are frequently used in meteorology to measure atmospheric pressure. Historically, meteorologists used millibars, but now the SI unit, the hectopascal (hPa), is also widely used (1 hPa = 1 mbar).

Real-World Examples and Applications

  • Tire Pressure: Car and bicycle tire pressures are often measured in bar or PSI (pounds per square inch). For example, a car tire might be inflated to 2.5 bar.
  • Weather Reports: Atmospheric pressure in weather reports can be given in millibars or hectopascals, where 1013.25 mbar is standard atmospheric pressure.
  • Scuba Diving: Divers often use bar to measure the pressure of compressed air in their tanks. A typical scuba tank might be filled to 200 bar.
  • Industrial Processes: Many industrial processes, such as hydraulic systems and pressure testing, use bar as a convenient unit of measurement.
  • Geology: Pressures deep within the Earth are often measured in kilobars (kbar), where 1 kbar = 1000 bar.
  • Vacuum: While bar is not commonly used for measuring high vacuum, it's relevant when discussing rough or backing vacuum levels. For high vacuum, units like Torr or Pascal are more typical.

Interesting Facts

  • The bar is a metric unit but not an SI unit. The SI unit for pressure is the Pascal (Pa).
  • The millibar (mbar) is commonly used in meteorology.
  • 1 bar is approximately equal to 0.987 atmospheres (atm).

Complete torr conversion table

Enter # of torr
Convert 1 torr to other unitsResult
torr to pascals (torr to Pa)133.32236842105
torr to kilopascals (torr to kPa)0.1333223684211
torr to megapascals (torr to MPa)0.0001333223684211
torr to hectopascals (torr to hPa)1.3332236842105
torr to millibar (torr to mbar)1.3332236842105
torr to bar (torr to bar)0.001333223684211
torr to meters of water @ 4°C (torr to mH2O)0.01359509806316
torr to millimeters of mercury (torr to mmHg)1.0000027633928
torr to pounds per square inch (torr to psi)0.01933676711189
torr to kilopound per square inch (torr to ksi)0.00001933676711189
torr to Inches of mercury (torr to inHg)0.03937006949325

Pressure conversions