Bar to Pascal Converter
Our free force pressure & torque converter handles bar pascal conversions. See tables, ratios, and examples for quick reference.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
Pa = bar x 100000 | 1 mbar = 100 Pa | 1 bar = 0.986923 atm
One bar equals exactly 100,000 pascals. The bar is a convenient metric pressure unit close to standard atmospheric pressure. One millibar (mbar) equals 100 Pa or 1 hectopascal (hPa). Key conversion: 1 bar = 14.5038 PSI = 750.062 mmHg = 0.986923 atm.
Worked Examples
Example 1: Hydraulic System Pressure
Problem:A hydraulic press operates at 150 bar. What is this in pascals and PSI?
Solution:Pascals: 150 x 100,000 = 15,000,000 Pa\nMegapascals: 15,000,000 / 1,000,000 = 15 MPa\nPSI: 15,000,000 / 6,894.76 = 2,175.57 PSI\nAtmospheres: 15,000,000 / 101,325 = 148.04 atm
Result:150 bar = 15,000,000 Pa = 15 MPa = 2,175.57 PSI
Example 2: Weather Barometric Pressure
Problem:The barometric pressure is 1023 millibar. Convert to other units.
Solution:Pascals: 1023 x 100 = 102,300 Pa\nBar: 1023 / 1000 = 1.023 bar\nAtmospheres: 102,300 / 101,325 = 1.0096 atm\nmmHg: 102,300 / 133.322 = 767.31 mmHg
Result:1023 mbar = 102,300 Pa = 1.023 bar = 1.01 atm
Frequently Asked Questions
How many pascals are in one bar?
One bar equals exactly 100,000 pascals (100 kPa). The bar is a metric unit of pressure that is slightly less than one standard atmosphere (1 atm = 101,325 Pa = 1.01325 bar). The bar is widely used in meteorology (as millibar or hectopascal), industrial pressure gauges, and scuba diving depth measurements. Its convenient relationship to pascals makes it easy to convert: simply multiply bar by 100,000 to get pascals.
What is the difference between bar and atm?
One bar equals 100,000 pascals while one atmosphere equals 101,325 pascals, making 1 atm approximately 1.01325 bar. The difference is about 1.3%. In many practical applications this difference is negligible, but in precise scientific work it matters. The bar was introduced as a convenient metric unit close to atmospheric pressure. Weather maps often use millibars (1 mbar = 100 Pa = 1 hectopascal) where standard sea-level pressure is about 1013.25 mbar.
When is bar used instead of pascal?
Bar is preferred over pascal when dealing with pressures near atmospheric level because the numbers are more convenient. A tire at 2.5 bar is easier to express than 250,000 Pa. Industry uses bar for hydraulic systems, compressed gas cylinders, and process engineering. Meteorologists use millibar (identical to hectopascal) for weather reporting. Scuba divers use bar to express tank pressure and depth pressure. Pascals and kilopascals are more common in scientific research and material strength specifications.
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy