Differential Pressure Calculator

Enter value and click on calculate. Result will be displayed.

P = Change in Pressure      d = Pipe Diameter
ρ = Fluid Density      W = Mass Flow Rate

Change in Pressure:
Bars
Pipe Diameter:
mm
Fluid Density:
Kg / m3
Mass Flow Rate:
Kg / Hr
Mud Weight Equivalent:
Lb / Gal
K valuet:

A differential pressure is the difference in pressure between two points in a fluid system. It is commonly used in applications like fluid flow measurements, filtration, and HVAC systems.

The formula for calculating differential pressure depends on the situation, but a basic formula that is widely used is based on Bernoulli’s equation and can be expressed as:

Where:

  • ΔP= differential pressure (Pa)
  • = fluid density (kg/m³)
  • = fluid velocity (m/s)

Alternatively, in more specific applications such as flow through an orifice, the differential pressure is often related to the flow rate using the orifice equation:

Where:

  • ΔP = differential pressure (Pa)
  • = flow rate (m³/s)
  • Cd = discharge coefficient (dimensionless, typically between 0.6 and 0.8)
  • = cross-sectional area of the orifice (m²)
  • = density of the fluid (kg/m³)