Explanation: This calculator uses the Darcy-Weisbach equation to estimate the pressure drop (PSI) based on flow rate, pipe diameter, length, and fluid density.

Formula: Pressure Drop (PSI) = (4.52 × Pipe Length × Flow Rate² × Fluid Density) / Pipe Diameter⁵

Relevance: This calculation is useful for understanding pressure losses in fluid transport systems such as pipes, hoses, and pumps.