Pressure Conversion

Unit	Value

Liquid column head to pressure

Used for level measurement and impulse lines. Based on water 1000 kg/m³ and mercury 13595 kg/m³.

Head	kPa	bar	psi

Common ranges

Typical instrument range series (bar) converted to MPa and psi.

Range	MPa	(psi)

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Gauge vs absolute: absolute = gauge + atmospheric (1 atm = 101.325 kPa). Always confirm G (gauge) or A (absolute) when selecting an instrument.
Common equivalents: 1 bar = 100 kPa = 0.1 MPa = 14.5038 psi = 1.0197 kgf/cm²; 10 m water column ≈ 98.07 kPa.