What is PSI๏ผ
PSI (Pounds per Square Inch) is a unit of pressure that is widely used in engineering, automotive industry and other fields. It is mainly used to measure the pressure of pipelines, tanks, gas cylinders, and tires. Especially in car maintenance, monitoring tire pressure is crucial to ensure driving safety and tire performance.
In the International System of Units, the conversion relationship between PSI and Pascal (Pa) is 1 PSI is approximately equal to 6894.757 Pa.
What is Bar?
Bar is a commonly used unit of pressure, derived from a part of the International System of Units (SI), and is commonly used in industry and engineering. The pressure unit Bar(wiki) comes from the Greek word “bรกros“, which means weight.
Millibars (mbar) were commonly used in meteorology earlier, and later the equivalent international unit hectopascals (hPa) was used. In engineering and science, Bar is widely used to measure the pressure of gases or liquids.
In addition, the units that also describe pressure include Pa (Pascal, which refers to one Newton force acting on one square meter), KPa, MPa, millimeters of water column(mmH2O), millimeters of mercury(mmHg), etc. mmH2O and mmHg are common in vacuum pump industry for measuring negative pressures.
Convert Bar to PSI
Some countries may not be used to using Bar as a pressure unit. Such as in China, people generally describe the pressure of gas in “kilograms”, and the unit is “kilogram force per square centimeter (kgf/cm2)”. One kilogram of pressure is one kilogram of force acting on one square centimeter, 1 kgf/cm2 โ 14.22 PSI.
Some European countries often use MPa as a pressure unit, while the commonly used pressure unit in the United States is “PSI”, and the specific symbol is “lbf/in2”, which means “pound force per square inch”. This unit is like the Fahrenheit temperature scale (F).
Understanding PSI and its conversion relationship will help to better understand and apply air power and pneumatic equipment, as well as easily convert between different pressure units, especially in international exchanges and scientific research.
Key conversion formulas
-
- 1 PSI to Pa โ 6895 Pa
- 1 PSI to kPa โ 6.895 kPa
- 1 Bar to PSI โ 14.5 PSI
- 1 atm to PSI โ 14.696 PSI
- 1 MPa to PSI โ 145 PSI
- 1 atm to Bar โ 1.01325 Bar
- 1 atm to mmHg โ 760 mmHg
- 1 PSI to kgf/cm2 โ 0.0703 kgf/cm2
Convert all units to metric units:
1 Bar โ 14.5 PSI โ 0.9869 atm โ 0.1 MPa โ 100 kPa โ 100000 Pa โ 1.01972 kgf/cm2 โ 750.06169 mmHg
Other pressure unit conversion formulas
1 standard atmosphere (atm) = 14.696 pounds per square inch (psi)
1 bar = 100 kilopascals (kPa)
1 dyne/square centimeter (dyn/cm2) = 0.1 pascals (Pa)
1 Torr = 133.322 pascals (Pa)
1 millimeter of mercury (mmHg) = 133.322 pascals (Pa)
1 millimeter of water column (mmH2O) = 9.80665 pascals (Pa)
1 engineering atmosphere = 98.0665 kilopascals (kPa)
1 kilopascals (kPa) = 0.145 pounds per square inch (psi) = 0.0102 kilograms per square centimeter (kgf/cm2) = 0.0098 atmospheres (atm)
1 pound force per square inch (psi) = 6.895 kilopascals (kPa) = 0.0703 kilograms of force per square centimeter (kgf/cm2) = 0.0689 bar = 0.068 atmosphere (atm)
1 standard atmosphere (atm) = 101.325 kilopascals (kPa) = 14.696 pounds per square inch (psi) = 1.0133 bar = 760 millimeters of mercury (mmHg)
| Bar to PSI conversion table | |
|---|---|
| 0.1 Bar to PSI = 1.45038 PSI | 11 Bar to PSI = 159.54 PSI |
| 0.2 Bar to PSI = 2.901 PSI | 12 Bar in PSI = 174.05 PSI |
| 0.3 Bar to PSI = 4.351 PSI | 12.5 Bar to PSI = 181.3 PSI |
| 0.4 Bar to PSI = 5.802 PSI | 13 Bar to PSI = 188.5 PSI |
| 0.5 Bar to PSI = 7.252 PSI | 13.5 Bar to PSI = 195.8 PSI |
| 0.6 Bar to PSI = 8.702 PSI | 13.8 Bar to PSI = 200.15 PSI |
| 0.7 Bar to PSI = 10.15 PSI | 14 Bar to PSI = 203.05 PSI |
| 0.8 Bar to PSI = 11.6 PSI | 15 Bar to PSI = 217.56 PSI |
| 0.9 Bar to PSI = 13.05 PSI | 16 Bar to PSI = 232.06 PSI |
| 1 Bar to PSI = 14.5038 PSI | 20 Bar to PSI = 290.1 PSI |
| 1.1 Bar to PSI = 15.95 PSI | 22 Bar to PSI = 319.08 PSI |
| 1.2 Bar to PSI = 17.4 PSI | 23 Bar to PSI = 333.59 PSI |
| 1.3 Bar to PSI = 18.85 PSI | 25 Bar to PSI = 362.6 PSI |
| 1.4 Bar to PSI = 20.31 PSI | 30 Bar to PSI = 435.11 PSI |
| 1.5 Bar to PSI = 21.76 PSI | 35 Bar to PSI = 507.63 PSI |
| 1.6 Bar to PSI = 23.21 PSI | 40 Bar to PSI = 580.15 PSI |
| 1.7 Bar to PSI = 24.66 PSI | 45 Bar to PSI = 652.67 PSI |
| 1.8 Bar to PSI = 26.11 PSI | 50 Bar to PSI = 725.19 PSI |
| 1.9 Bar to PSI = 27.56 PSI | 55 Bar to PSI = 797.71 PSI |
| 2 Bar to PSI = 29.01 PSI | 60 Bar to PSI = 870.23 PSI |
| 2.1 Bar in PSI = 30.46 PSI | 70 Bar to PSI = 1015.27 PSI |
| 2.2 Bar in PSI = 31.91 PSI | 80 Bar to PSI = 1160.3 PSI |
| 2.3 Bar in PSI = 33.36 PSI | 90 Bar to PSI = 1305.34 PSI |
| 2.4 Bar in PSI = 34.81 PSI | 100 Bar in PSI = 1450.38 PSI |
| 2.5 Bar in PSI = 36.26 PSI | 110 Bar to PSI = 1595.42 PSI |
| 2.6 Bar in PSI = 37.71 PSI | 120 Bar to PSI = 1740.46 PSI |
| 2.7 Bar in PSI = 39.16 PSI | 125 Bar to PSI = 1812.96 PSI |
| 2.8 Bar in PSI = 40.61 PSI | 150 Bar in PSI = 2175.57 PSI |
| 2.9 Bar in PSI = 42.06 PSI | 200 Bar in PSI = 2900.76 PSI |
| 3 Bar to PSI = 43.51 PSI | 250 Bar in PSI = 3625.95 PSI |
| 4 Bar to PSI = 58.02 PSI | 260 Bar in PSI = 3770.99 PSI |
| 5 Bar to PSI = 72.52 PSI | 270 Bar in PSI = 3916.03 PSI |
| 6 Bar to PSI = 87.02 PSI | 330 Bar in PSI = 4786.25 PSI |
| 7 Bar to PSI = 101.5 PSI | 350 Bar in PSI = 5076.33 PSI |
| 8 Bar to PSI = 116 PSI | 400 Bar in PSI = 5801.52 PSI |
| 9 Bar to PSI = 130.5 PSI | 450 Bar in PSI = 6526.71 PSI |
| 10 Bar in PSI = 145.038 PSI | 500 Bar in PSI = 7251.9 PSI |
| 600 Bar in PSI = 8702.28 PSI | |
| PSI to Bar calculation | |
|---|---|
| 1 PSI to Bar = 0.06895 Bar | 130 PSI to Bar = 8.9635 Bar |
| 10 PSI to Bar = 0.6895 Bar | 140 PSI to Bar = 9.653 Bar |
| 14 PSI to Bar = 0.9653 Bar | 150 PSIA to Bar = 10.3425 Bar |
| 15 PSI to Bar = 1.03425 Bar | 220 PSI to Bar = 15.169 Bar |
| 23 PSI to Bar = 1.58585 Bar | 500 PSI to Bar = 34.475 Bar |
| 40 PSI to Bar = 2.758 Bar | 1000 PSI in Bar = 68.95 Bar |
| 42 PSI to Bar = 2.8959 Bar | 1200 PSI to Bar = 82.74 Bar |
| 44 PSI to Bar = 3.0338 Bar | 1400 PSI to Bar = 96.53 Bar |
| 45 PSI to Bar = 3.10275 Bar | 1400 PSI to Bar = 96.53 Bar |
| 55 PSI to Bar = 3.79225 Bar | 5000 PSI to Bar = 344.75 Bar |
| 60 PSI to Bar = 4.137 Bar | 10000 PSI in Bar = 689.5 Bar |
| 65 PSI to Bar = 4.48175 Bar | 15000 PSI in Bar = 1034.25 Bar |
| 70 PSI to Bar = 4.82 65 Bar | 60000 PSI to Bar = 4137 Bar |
| 75 PSI to Bar = 5.17125 Bar | 10mBar to PSI = 0.145038 PSI |
| 80 PSI to Bar = 5.516 Bar | 10MPa to Bar = 100 Bar |
| 90 PSI to Bar = 6.2055 Bar | 10MPa to PSI = 1450.38 PSI |
| 100 PSI in Bar = 6.895 Bar | 108 KPa to PSI = 15.66 PSI |
| 110 PSI to Bar = 7.5845 Bar | 100KPa to Bar = 1 Bar |
| 120 PSI to Bar = 8.274 Bar | 1000 KPa to PSI = 145.038 PSI |
| 125 PSI to Bar = 8.61875 Bar | |
PSI to Bar FAQ
How to convert PSI to BAR?
You can use the formula 1 PSI โ 0.06895 Bar to convert PSI to Bar, or refer to the PSI to Bar calculation table above to find the Bar value corresponding to a certain PSI.
How much air should be in a tire?
Typically car front tires have an unladen pressure of 31 to 34 PSI and rear tires pressure of 34 to 37 PSI. But to know exactly how many psi are in a car tire, you can check the label on the side of the tire or car door to get the accurate answer.
What is PSIA and PSIG?
PSIG (pounds per square inch gauge) is the PSI read in a pressure gaugeใPSIA (pounds per square inch absolute) is equal to PSIG + 1 atm(atmospheric pressure). The PSIA at sea level is 14.7 PSI. 1 PSIA to Bar = 0.06895 Bar + 14.7 = 14.76895 Bar.
How to convert CFM to m3/hr?
1 CFM to m3/hr = 1.699 m3/hr, and 1 m3/hr to CFM = 0.5886 CFM.
1 CFM to m3/min = 0.02832 m3/min, and 1 m3/min to CFM = 35.31 CFM.
What is SCFM?
SCFM vs CFM: SCFM (Standard Cubic Feet per Minute) means the CFM that measured under standard temperature and pressure conditions (ambient temperature 60ยฐF(15ยฐC) to 68ยฐF(20ยฐC), sea level pressure 14.7 psi (760 mmHg), relative humidity 36%).
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