Bar - Pressure Unit - Definition, Application, Conversions

What is a bar?

The bar is a unit of atmospheric pressure used in meteorology, oceanography, as well as other scientific and technical fields. The bar was introduced by the British meteorologist Napier Shaw in 1909 and quickly gained popularity in atmospheric science.

1 bar corresponds approximately to the pressure exerted

• by a mass of 1 kg on an area of 1 cm²,
• by a mass of 10 t on an area of 1 m².

Bar is a popular unit used in the industry to measure working pressure in industrial hoses. Industrial hoses used in hydraulic or gas systems often have working pressures expressed in bars. Bar is also crucial when selecting hose couplings to ensure safety and efficiency.

When are bars used to measure pressure?

Bars are used to measure pressure in the following applications:

• Oceanography - In oceanography, the bar is used to measure water pressure, especially in deep water where it can be significant. This is crucial when studying the deep sea and underwater ecosystems 
• Engineering and industry - In industry, the bar is used to measure pressure in hydraulic and pneumatic systems and air compressors. It is important in the design and operation of machinery and equipment such as pumps and motors. 
• Automation and process control - In industrial automation and process control, bar is used to monitor and regulate pressure in various systems (e.g. cooling or heating), as well as in the chemical industry. 
• Atmospheric and climate science - In atmospheric and climate research, pressure measured in bars helps scientists understand and model phenomena such as storm systems, cyclones, anticyclones and climate change. 
• Aerospace technology - In aviation and astronautics, the bar is used to measure cabin pressure in aircraft and spacecraft, which is crucial for the safety and comfort of crew and passengers. 
• Medicine and pharmacology - In medicine, the bar can be used to measure pressure in some specialised applications, such as hyperbaric oxygen therapy devices.

How to measure pressure in bar?

To measure pressure in bar, use a manometer calibrated in this unit or a measuring device that allows reading in bar.

Here are the steps to take:

1. Choose the right manometer - A mechanical manometer with a dial or a digital manometer is most often used to measure pressure in bar.
2. Identify the measuring point - Determine the place where you want to measure the pressure (e.g. in a hydraulic system, gas system, car tires, pressure tanks). 
3. Connect the manometer - Attach the manometer to the appropriate measuring point. It is important that the connection is tight to avoid pressure leaks, which could affect the accuracy of the measurement.
4. Read the result - In a mechanical manometer, the pressure will be indicated on the device's dial. In a digital manometer, the result will appear on the display.

If your device measures pressure in other pressure units, you can convert it to bar using the appropriate pressure units converters.

Pressure unit converter bar

• 1 bar = 100 000 Pa
• 1 bar = 1000 hPa
• 1 bar = 100 kPa
• 1 bar = 0,1 MPa
• 1 bar = 0,986923 atm
• 1 bar = 14,5038 PSI
• 1 bar = 10 197,1621 mmH2O
• 1 bar = 401,463 inH2O
• 1 bar = 750,062 Tr
• 1 bar = 750,062 mmHg
• 1 bar = 29,53 inHg
• 1 bar = 2088,54 PSF
• 1 bar = 1,01972 at
  

1 bar = 100 000 Pa = 1000 hPa = 100 kPa = 0,1 MPa = 0,986923 atm = 14,5038 PSI = 10 197,1621 mmH2O = 401,463 inH2O = 750,062 Tr = 750,062 mmHg = 29,53 inHg = 2088,54 PSF = 1,01972 at

Bar to Pa - Bar to Pascal pressure unit conversion

To convert pressure from Bar to Pascal (Pa) multiply the pressure in Bar by 100000.

• 0,5 bar to Pa? 0,5 bar is equal to 50000 Pa
• 1 bar to Pa? 1 bar is equal to 100000 Pa
• 1,013 bar to Pa? 1,013 bar is equal to 101300 Pa
• 1,1 bar to Pa? 1,1 bar is equal to 110000, Pa
• 1,5 bar to Pa? 1,5 bar is equal to 150000 Pa
• 2 bar to Pa? 2 bar is equal to 200000 Pa
• 2,5 bar to Pa? 2,5 bar is equal to 250000 Pa
• 2,6 bar to Pa? 2,6 bar is equal to 260000 Pa
• 3 bar to Pa? 3 bar is equal to 300000 Pa
• 3,5 bar to Pa? 3,5 bar is equal to 350000 Pa
• 4 bar to Pa? 4 bar is equal to 400000 Pa
• 5 bar to Pa? 5 bar is equal to 500000 Pa
• 6 bar to Pa? 6 bar is equal to 600000 Pa
• 7 bar to Pa? 7 bar is equal to 700000 Pa
• 8 bar to Pa? 8 bar is equal to 800000 Pa
• 10 bar to Pa? 10 bar is equal to 1000000 Pa
• 15 bar to Pa? 15 bar is equal to 1500000 Pa
• 16 bar to Pa? 16 bar is equal to 1600000 Pa
• 20 bar to Pa? 20 bar is equal to 2000000 Pa
• 25 bar to Pa? 25 bar is equal to 2500000 Pa
• 30 bar to Pa? 30 bar is equal to 3000000 Pa
• 35 bar to Pa? 35 bar is equal to 3500000 Pa
• 40 bar to Pa? 40 bar is equal to 4000000 Pa
• 50 bar to Pa? 50 bar is equal to 5000000 Pa
• 100 bar to Pa? 100 bar is equal to 10000000 Pa
• 150 bar to Pa? 150 bar is equal to 15000000 Pa
• 200 bar to Pa? 200 bar is equal to 20000000 Pa
• 250 bar to Pa? 250 bar is equal to 25000000 Pa
• 300 bar to Pa? 300 bar is equal to 30000000 Pa
• 350 bar to Pa? 350 bar is equal to 35000000 Pa
• 500 bar to Pa? 500 bar is equal to 50000000 Pa
• 700 bar to Pa? 700 bar is equal to 70000000 Pa
• 1000 bar to Pa? 1000 bar is equal to 100000000 Pa

Bar to hPa - Bar to Hectopascal pressure unit conversion

To convert pressure from Bar to Hectopascal (hPa) multiply the pressure in Bar by 1000.

• 1 bar to hPa? 1 bar is equal to 1000 hPa
• 2 bar to hPa? 2 bar is equal to 2000 hPa
• 5 bar to hPa? 5 bar is equal to 5000 hPa
• 10 bar to hPa? 10 bar is equal to 10000 hPa
• 20 bar to hPa? 20 bar is equal to 20000 hPa
• 50 bar to hPa? 50 bar is equal to 50000 hPa
• 100 bar to hPa? 100 bar is equal to 100000 hPa
• 200 bar to hPa? 200 bar is equal to 200000 hPa
• 500 bar to hPa? 500 bar is equal to 500000 hPa
• 1000 bar to hPa? 1000 bar is equal to 1000000 hPa

Bar to kPa - Bar to Kilopascal pressure unit conversion

To convert pressure from Bar to Kilopascal (kPa) multiply the pressure in Bar by 100.

• 1 bar to kPa? 1 bar is equal to 100 kPa
• 1,5 bar to kPa? 1,5 bar is equal to 150 kPa
• 2 bar to kPa? 2 bar is equal to 200 kPa
• 2,5 bar to kPa? 2,5 bar is equal to 250 kPa
• 5 bar to kPa? 5 bar is equal to 500 kPa
• 10 bar to kPa? 10 bar is equal to 1000 kPa
• 20 bar to kPa? 20 bar is equal to 2000 kPa
• 50 bar to kPa? 50 bar is equal to 5000 kPa
• 100 bar to kPa? 100 bar is equal to 10000 kPa
• 200 bar to kPa? 200 bar is equal to 20000 kPa
• 500 bar to kPa? 500 bar is equal to 50000 kPa
• 1000 bar to kPa? 1000 bar is equal to 100000 kPa

Bar to MPa - Bar to Megapascal pressure unit conversion

To convert pressure from Bar to Megapascal (MPa) multiply the pressure in Bar by 0,1.

• 1 bar to MPa? 1 bar is equal to 0,1 MPa
• 2 bar to MPa? 2 bar is equal to 0,2 MPa
• 3 bar to MPa? 3 bar is equal to 0,3 MPa
• 4 bar to MPa? 4 bar is equal to 0,4 MPa
• 5 bar to MPa? 5 bar is equal to 0,5 MPa
• 6 bar to MPa? 6 bar is equal to 0,6 MPa
• 8 bar to MPa? 8 bar is equal to 0,8 MPa
• 10 bar to MPa? 10 bar is equal to 1 MPa
• 15 bar to MPa? 15 bar is equal to 1,5 MPa
• 16 bar to MPa? 16 bar is equal to 1,6 MPa
• 20 bar to MPa? 20 bar is equal to 2 MPa
• 25 bar to MPa? 25 bar is equal to 2,5 MPa
• 50 bar to MPa? 50 bar is equal to 5 MPa
• 100 bar to MPa? 100 bar is equal to 10 MPa
• 150 bar to MPa? 150 bar is equal to 15 MPa
• 200 bar to MPa? 200 bar is equal to 20 MPa
• 500 bar to MPa? 500 bar is equal to 50 MPa
• 700 bar to MPa? 700 bar is equal to 70 MPa
• 1000 bar to MPa? 1000 bar is equal to 100 MPa

Bar to atm - Bar to Atmosphere pressure unit conversion

To convert pressure from Bar to Atmosphere (atm) multiply the pressure in Bar by 0,986923.

• 1 bar to atm? 1 bar is equal to 0,986923 atm
• 1,5 bar to atm? 1,5 bar is equal to 1,4803845 atm
• 2 bar to atm? 2 bar is equal to 1,973846 atm
• 5 bar to atm? 5 bar is equal to 4,934615 atm
• 6 bar to atm? 6 bar is equal to 5,921538 atm
• 8 bar to atm? 8 bar is equal to 7,895384 atm
• 10 bar to atm? 10 bar is equal to 9,86923 atm
• 20 bar to atm? 20 bar is equal to 19,73846 atm
• 30 bar to atm? 30 bar is equal to 29,60769 atm
• 50 bar to atm? 50 bar is equal to 49,34615 atm
• 100 bar to atm? 100 bar is equal to 98,6923 atm
• 150 bar to atm? 150 bar is equal to 148,03845 atm
• 200 bar to atm? 200 bar is equal to 197,3846 atm
• 300 bar to atm? 300 bar is equal to 296,0769 atm
• 500 bar to atm? 500 bar is equal to 493,4615 atm
• 1000 bar to atm? 1000 bar is equal to 986,923 atm

Bar to PSI pressure unit conversion

To convert pressure from Bar to PSI multiply the pressure in Bar by 14,5038.

• 0,1 bar to PSI? 0,1 bar is equal to 1,45038 PSI
• 0,2 bar to PSI? 0,2 bar is equal to 2,90076 PSI
• 0,3 bar to PSI? 0,3 bar is equal to 4,35114 PSI
• 0,5 bar to PSI? 0,5 bar is equal to 7,2519 PSI
• 0,6 bar to PSI? 0,6 bar is equal to 8,70228 PSI
• 0,7 bar to PSI? 0,7 bar is equal to 10,15266 PSI
• 0,8 bar to PSI? 0,8 bar is equal to 11,60304 PSI
• 0,9 bar to PSI? 0,9 bar is equal to 13,05342 PSI
• 1 bar to PSI? 1 bar is equal to 14,5038 PSI
• 1,1 bar to PSI? 1,1 bar is equal to 15,95418 PSI
• 1,2 bar to PSI? 1,2 bar is equal to 17,40456 PSI
• 1,3 bar to PSI? 1,3 bar is equal to 18,85494 PSI
• 1,4 bar to PSI? 1,4 bar is equal to 20,30532 PSI
• 1,5 bar to PSI? 1,5 bar is equal to 21,7557 PSI
• 1,6 bar to PSI? 1,6 bar is equal to 23,20608 PSI
• 1,7 bar to PSI? 1,7 bar is equal to 24,65646 PSI
• 1,8 bar to PSI? 1,8 bar is equal to 26,10684 PSI
• 1,9 bar to PSI? 1,9 bar is equal to 27,55722 PSI
• 2 bar to PSI? 2 bar is equal to 29,0076 PSI
• 2,1 bar to PSI? 2,1 bar is equal to 30,45798 PSI
• 2,2 bar to PSI? 2,2 bar is equal to 31,90836 PSI
• 2,3 bar to PSI? 2,3 bar is equal to 33,35874 PSI
• 2,4 bar to PSI? 2,4 bar is equal to 34,80912 PSI
• 2,5 bar to PSI? 2,5 bar is equal to 36,2595 PSI
• 2,6 bar to PSI? 2,6 bar is equal to 37,70988 PSI
• 2,7 bar to PSI? 2,7 bar is equal to 39,16026 PSI
• 2,8 bar to PSI? 2,8 bar is equal to 40,61064 PSI
• 2,9 bar to PSI? 2,9 bar is equal to 42,06102 PSI
• 3 bar to PSI? 3 bar is equal to 43,5114 PSI
• 3,1 bar to PSI? 3,1 bar is equal to 44,96178 PSI
• 3,2 bar to PSI? 3,2 bar is equal to 46,41216 PSI
• 3,3 bar to PSI? 3,3 bar is equal to 47,86254 PSI
• 3,5 bar to PSI? 3,5 bar is equal to 50,7633 PSI
• 3,7 bar to PSI? 3,7 bar is equal to 53,66406 PSI
• 4 bar to PSI? 4 bar is equal to 58,0152 PSI
• 4,2 bar to PSI? 4,2 bar is equal to 60,91596 PSI
• 4,5 bar to PSI? 4,5 bar is equal to 65,2671 PSI
• 5 bar to PSI? 5 bar is equal to 72,519 PSI
• 5,5 bar to PSI? 5,5 bar is equal to 79,7709 PSI
• 6 bar to PSI? 6 bar is equal to 87,0228 PSI
• 6,5 bar to PSI? 6,5 bar is equal to 94,2747 PSI
• 7 bar to PSI? 7 bar is equal to 101,5266 PSI
• 7,5 bar to PSI? 7,5 bar is equal to 108,7785 PSI
• 8 bar to PSI? 8 bar is equal to 116,0304 PSI
• 8,5 bar to PSI? 8,5 bar is equal to 123,2823 PSI
• 9 bar to PSI? 9 bar is equal to 130,5342 PSI
• 10 bar to PSI? 10 bar is equal to 145,038 PSI
• 12 bar to PSI? 12 bar is equal to 174,0456 PSI
• 14 bar to PSI? 14 bar is equal to 203,0532 PSI
• 15 bar to PSI? 15 bar is equal to 217,557 PSI
• 16 bar to PSI? 16 bar is equal to 232,0608 PSI
• 17 bar to PSI? 17 bar is equal to 246,5646 PSI
• 18 bar to PSI? 18 bar is equal to 261,0684 PSI
• 19 bar to PSI? 19 bar is equal to 275,5722 PSI
• 20 bar to PSI? 20 bar is equal to 290,076 PSI
• 24 bar to PSI? 24 bar is equal to 348,0912 PSI
• 25 bar to PSI? 25 bar is equal to 362,595 PSI
• 35 bar to PSI? 35 bar is equal to 507,633 PSI
• 45 bar to PSI? 45 bar is equal to 652,671 PSI
• 50 bar to PSI? 50 bar is equal to 725,19 PSI
• 80 bar to PSI? 80 bar is equal to 1160,304 PSI
• 100 bar to PSI? 100 bar is equal to 1450,38 PSI
• 110 bar to PSI? 110 bar is equal to 1595,418 PSI
• 120 bar to PSI? 120 bar is equal to 1740,456 PSI
• 130 bar to PSI? 130 bar is equal to 1885,494 PSI
• 140 bar to PSI? 140 bar is equal to 2030,532 PSI
• 150 bar to PSI? 150 bar is equal to 2175,57 PSI
• 160 bar to PSI? 160 bar is equal to 2320,608 PSI
• 180 bar to PSI? 180 bar is equal to 2610,684 PSI
• 200 bar to PSI? 200 bar is equal to 2900,76 PSI
• 210 bar to PSI? 210 bar is equal to 3045,798 PSI
• 220 bar to PSI? 220 bar is equal to 3190,836 PSI
• 230 bar to PSI? 230 bar is equal to 3335,874 PSI
• 250 bar to PSI? 250 bar is equal to 3625,95 PSI
• 280 bar to PSI? 280 bar is equal to 4061,064 PSI
• 300 bar to PSI? 300 bar is equal to 4351,14 PSI
• 310 bar to PSI? 310 bar is equal to 4496,178 PSI
• 330 bar to PSI? 330 bar is equal to 4786,254 PSI
• 350 bar to PSI? 350 bar is equal to 5076,33 PSI
• 400 bar to PSI? 400 bar is equal to 5801,52 PSI
• 420 bar to PSI? 420 bar is equal to 6091,596 PSI
• 450 bar to PSI? 450 bar is equal to 6526,71 PSI
• 500 bar to PSI? 500 bar is equal to 7251,9 PSI
• 600 bar to PSI? 600 bar is equal to 8702,28 PSI
• 700 bar to PSI? 700 bar is equal to 10152,66 PSI
• 800 bar to PSI? 800 bar is equal to 11603,04 PSI
• 1000 bar to PSI? 1000 bar is equal to 14503,8 PSI
• 2000 bar to PSI? 2000 bar is equal to 29007,6 PSI

Bar to mmH2O - Bar to Milimetre of water column pressure unit conversion

To convert pressure from Bar to Milimetre of water column (mmH2O) multiply the pressure in Bar by 10197,1621.

• 1 bar to mmH2O? 1 bar is equal to 10197,1621 mmH2O
• 2 bar to mmH2O? 2 bar is equal to 20394,3242 mmH2O
• 5 bar to mmH2O? 5 bar is equal to 50985,8105 mmH2O
• 10 bar to mmH2O? 10 bar is equal to 101971,621 mmH2O
• 20 bar to mmH2O? 20 bar is equal to 203943,242 mmH2O
• 50 bar to mmH2O? 50 bar is equal to 509858,105 mmH2O
• 100 bar to mmH2O? 100 bar is equal to 1019716,21 mmH2O
• 200 bar to mmH2O? 200 bar is equal to 2039432,42 mmH2O
• 500 bar to mmH2O? 500 bar is equal to 5098581,05 mmH2O
• 1000 bar to mmH2O? 1000 bar is equal to 10197162,1 mmH2O

Bar to inH2O - Bar to Inch of water column pressure unit conversion

To convert pressure from Bar to Inch of water column (inH2O) multiply the pressure in Bar by 401,463.

• 1 bar to inH2O? 1 bar is equal to 401,463 inH2O
• 2 bar to inH2O? 2 bar is equal to 802,926 inH2O
• 5 bar to inH2O? 5 bar is equal to 2007,315 inH2O
• 10 bar to inH2O? 10 bar is equal to 4014,63 inH2O
• 20 bar to inH2O? 20 bar is equal to 8029,26 inH2O
• 50 bar to inH2O? 50 bar is equal to 20073,15 inH2O
• 100 bar to inH2O? 100 bar is equal to 40146,3 inH2O
• 200 bar to inH2O? 200 bar is equal to 80292,6 inH2O
• 500 bar to inH2O? 500 bar is equal to 200731,5 inH2O
• 1000 bar to inH2O? 1000 bar is equal to 401463 inH2O

Bar to torr pressure unit conversion

To convert pressure from Bar to torr (Tr) multiply the pressure in Bar by 750,062.

• 1 bar to torr? 1 bar is equal to 750,062 torr
• 2 bar to torr? 2 bar is equal to 1500,124 torr
• 5 bar to torr? 5 bar is equal to 3750,31 torr
• 10 bar to torr? 10 bar is equal to 7500,62 torr
• 20 bar to torr? 20 bar is equal to 15001,24 torr
• 50 bar to torr? 50 bar is equal to 37503,1 torr
• 100 bar to torr? 100 bar is equal to 75006,2 torr
• 200 bar to torr? 200 bar is equal to 150012,4 torr
• 500 bar to torr? 500 bar is equal to 375031 torr
• 1000 bar to torr? 1000 bar is equal to 750062 torr

Bar to mmHg - Bar to Milimetre of mercury column pressure unit conversion

To convert pressure from Bar to Milimetre of mercury column (mmHg) multiply the pressure in Bar by 750,062.

• 1 bar to mmHg? 1 bar is equal to 750,062 mmHg
• 2 bar to mmHg? 2 bar is equal to 1500,124 mmHg
• 5 bar to mmHg? 5 bar is equal to 3750,31 mmHg
• 10 bar to mmHg? 10 bar is equal to 7500,62 mmHg
• 20 bar to mmHg? 20 bar is equal to 15001,24 mmHg
• 50 bar to mmHg? 50 bar is equal to 37503,1 mmHg
• 100 bar to mmHg? 100 bar is equal to 75006,2 mmHg
• 200 bar to mmHg? 200 bar is equal to 150012,4 mmHg
• 500 bar to mmHg? 500 bar is equal to 375031 mmHg
• 1000 bar to mmHg? 1000 bar is equal to 750062 mmHg

Bar to inHg - Bar to Inch of mercury column pressure unit conversion

To convert pressure from Bar to Inch of mercury column (inHg) multiply the pressure in Bar by 29,53.

• 1 bar to inHg? 1 bar is equal to 29,53 inHg
• 2 bar to inHg? 2 bar is equal to 59,06 inHg
• 5 bar to inHg? 5 bar is equal to 147,65 inHg
• 10 bar to inHg? 10 bar is equal to 295,3 inHg
• 20 bar to inHg? 20 bar is equal to 590,6 inHg
• 50 bar to inHg? 50 bar is equal to 1476,5 inHg
• 100 bar to inHg? 100 bar is equal to 2953 inHg
• 200 bar to inHg? 200 bar is equal to 5906 inHg
• 500 bar to inHg? 500 bar is equal to 14765 inHg
• 1000 bar to inHg? 1000 bar is equal to 29530 inHg

Bar to PSF pressure unit conversion

To convert pressure from Bar to PSF multiply the pressure in Bar by 2088,54.

• 1 bar to PSF? 1 bar is equal to 2088,54 PSF
• 2 bar to PSF? 2 bar is equal to 59,06 PSF
• 5 bar to PSF? 5 bar is equal to 147,65 PSF
• 10 bar to PSF? 10 bar is equal to 295,3 PSF
• 20 bar to PSF? 20 bar is equal to 590,6 PSF
• 50 bar to PSF? 50 bar is equal to 1476,5 PSF
• 100 bar to PSF? 100 bar is equal to 2953 PSF
• 200 bar to PSF? 200 bar is equal to 5906 PSF
• 500 bar to PSF? 500 bar is equal to 14765 PSF
• 1000 bar to PSF? 1000 bar is equal to 29530 PSF

Bar to at - Bar to Technical atmosphere pressure unit conversion

To convert pressure from Bar to Technical Atmosphere (at) multiply the pressure in Bar by 1,01972.

• 1 bar to at? 1 bar is equal to 1,01972 at
• 2 bar to at? 2 bar is equal to 2,03944 at
• 5 bar to at? 5 bar is equal to 5,0986 at
• 10 bar to at? 10 bar is equal to 10,1972 at
• 20 bar to at? 20 bar is equal to 20,3944 at
• 50 bar to at? 50 bar is equal to 50,986 at
• 100 bar to at? 100 bar is equal to 101,972 at
• 200 bar to at? 200 bar is equal to 203,944 at
• 500 bar to at? 500 bar is equal to 509,86 at
• 1000 bar to at? 1000 bar is equal to 1019,72 at