Pump & Hose Sizing Calculator

Determine the minimum hose size required based on fluid viscosity, flow rate, hose length, and available pump pressure.

Fluid Water Diesel Fuel Glycol Vegetable Oil Hydraulic Oil ISO 32 Hydraulic Oil ISO 46 Hydraulic Oil ISO 68 Hydraulic Oil ISO 100 Hydraulic Oil ISO 220 Motor Oil SAE 30 Motor Oil SAE 10W-30 Motor Oil SAE 15W-40 Gear Oil SAE 90 Gear Oil SAE 140 Gear Oil SAE 220 Custom Viscosity Fluid Temperature (°F) Flow Rate (GPM) Hose Length (ft) Available Pump Pressure (PSI) Calculate

Calculation Method

This calculator estimates hose pressure loss using the Darcy-Weisbach equation. It calculates flow velocity, Reynolds number, friction factor, and pressure loss based on fluid viscosity, hose diameter, flow rate, and hose length. Results are estimates for straight hose only. Actual losses will increase with fittings, valves, filters, quick couplers, and elevation changes.