Formula for calculating a static head in kpa

Field Instrumentation
1

Static Head = pgh p= Density of the liquid g= Gravity h= height of the liquid column

2

The static head pressure in kilopascals (kPa) is computed using the following formula:

kPa Formula

P = ρ x g x h

Where

P - Static head pressure in kPa

ρ - Fluid’s density (ρ) is measured in kg/m³.

g - Acceleration due to gravity, which is approximately 9.81m/s2

h - Fluid column’s height (or) head in meters.

To convert pressure to kilopascals (kPa), divide the value by 1000

NOTE-1: 1 Pa = 1 N/m²,

NOTE-2: 1 kPa = 1000 Pa

Therefore, the final formula is:

P = ρ x g x h/1000

Solved Example

For a 10-meter-high water column:

  • ρ (water density) = 1000 kg/m³
  • g = 9.81 m/s²
  • h = 10 m

P (kPa) = 1000 x 9.81 x 10/1000 = 98.1 kPa

Therefore, the static head pressure would be 98.1 kPa.