Pump Sizing Calculator
Pump sizing is important because it ensures a fluid system delivers the required flow rate and pressure without wasting energy or causing issues like cavitation, noise, or premature wear. A correctly sized pump improves efficiency, system reliability, and long-term operating costs in applications such as HVAC systems, water distribution, and industrial processes.
Pump sizing is typically based on calculating the required flow rate and total dynamic head (TDH), which represents the total resistance the pump must overcome, including static lift, pipe friction losses, and pressure losses in fittings and equipment. To calculate pipe friction losses and minor losses (fittings, valves etc) the Pipe Losses Calculator can be used. Once these values are known, pump power can be estimated using the relationship P = (Flow Rate × Head × Fluid Density × Gravity) / η, allowing engineers to select an appropriately sized pump from manufacturer performance curves.