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About

Pressure measurements in industrial hydraulics and meteorology often differ in their base units. The Pascal (Pa) is the standard SI unit but is relatively small for high-pressure applications. Engineers typically prefer the Bar (bar), which is approximately equal to atmospheric pressure at sea level. Accurate conversion is vital when calibrating pressure relief valves or interpreting weather station data, where a decimal error could compromise system safety or forecast models.

This tool performs a direct, high-precision transformation. Unlike general search engines that may round values aggressively, this converter supports scientific notation (e.g., 2.5e6) and maintains decimal fidelity for laboratory-grade requirements.

pressure converter hydraulics pneumatics meteorology engineering tools

Formulas

The Bar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly 100,000 Pascals.

P(bar) = P(Pa)100,000

In scientific notation:

1 bar = 105 Pa

Reference Data

Pressure (Pa)Pressure (bar)Common Context
100,000 Pa1 barStandard Atmospheric Pressure (approx)
1,000,000 Pa10 barTypical Pneumatic Air Line
10,000,000 Pa100 barIndustrial Hydraulics
1 Pa0.00001 barVery Low Vacuum
101,325 Pa1.01325 barStandard Atmosphere (1 atm)
200,000 Pa2 barCar Tire (Approx 29 PSI)
5,000 Pa0.05 barHVAC Duct Static Pressure

Frequently Asked Questions

No. 1 Bar is 100,000 Pascals. 1 Standard Atmosphere (atm) is 101,325 Pascals. They are close (about 1.3% difference) but distinct. In high-precision engineering, treating them as identical can lead to calibration errors.
Gauge pressure (barg) measures pressure relative to the ambient atmospheric pressure. Absolute pressure (bara) includes atmospheric pressure. This calculator converts the unit value regardless of the reference point (absolute or gauge).
The Pascal is the derived SI unit (Newtons per square meter). It makes mathematical derivations in physics consistent. However, for practical usage like tire pressure or diving, Kilopascals (kPa) or Bars are more convenient numbers to work with.