bar
Definition
The bar equals 100,000 pascals — slightly less than one atmosphere (1.01325 bar). It is a convenient unit for everyday pressures: tyre pressures, diving depth, weather fronts. Common in European engineering.
Common uses
- European tyre pressure gauges
- Scuba-diving depth pressure
- Hydraulic and pneumatic systems
🌍 Real-world scale
Car tyre: 2.0–2.5 bar. SCUBA at 10 m depth: 2 bar absolute. Fire hose: 5–7 bar.
Convert from bars
9 conversionsBar to Pascal1 bar = 100,000 PaBar to Kilopascal1 bar = 100 kPaBar to Megapascal1 bar = 0.1 MPaBar to Millibar1 bar = 1,000 mbarBar to Pound per Square Inch1 bar = 14.5038 psiBar to Atmosphere1 bar = 0.9869 atmBar to Millimeter of Mercury1 bar = 750.062 mmHgBar to Torr1 bar = 750.062 TorrBar to Inch of Mercury1 bar = 29.53 inHg
Convert to bars
9 conversionsPascal to Bar1 Pa = 1.0000e-5 barKilopascal to Bar1 kPa = 0.01 barMegapascal to Bar1 MPa = 10 barMillibar to Bar1 mbar = 0.001 barPound per Square Inch to Bar1 psi = 0.06895 barAtmosphere to Bar1 atm = 1.01325 barMillimeter of Mercury to Bar1 mmHg = 0.001333 barTorr to Bar1 Torr = 0.001333 barInch of Mercury to Bar1 inHg = 0.03386 bar
Tips
- 1 bar = 100 kPa = 0.987 atm = 14.5 psi.
- Almost 1 atm — convenient approximation.
- Tyre pressures: 2.0–2.5 bar typical car, 6–10 bar truck.
Common mistakes
- Assuming 1 bar = 1 atm exactly — 1.3% off.
- Mixing bar with psi — need factor of 14.5.
- Using bar for high-pressure work — switch to MPa.
FAQ about the bar
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