About this pressure head converter
Convert pressure head units for hydraulics, pump sizing, plumbing, HVAC, water distribution, and fluid-column measurements.
Conversions are based on water at standard density and standard gravity, matching common engineering pressure-head references.
Units covered
Head and pressure units
m H2O, ft H2O, cm H2O, psi, kPa, Pa, bar, mmHg, and inHg.
Hydraulic systems
Helpful for pumps, tanks, pipes, manometers, building water pressure, and HVAC checks.
Fluid column context
Converts between water columns, mercury columns, and direct pressure units.
How to use it
- Enter the pressure head or pressure value.
- Select the source unit and output unit.
- Use water-column units for hydraulic head and direct pressure units for equipment ratings.