Use the pipe flow calculator to find the velocity and discharge of water in a gravity-fed pipe flow.

This pipe flow rate calculator calculates the volumetric flow rate (discharge rate) a gas or fluid (liquid) going through a round or rectangular pipe of known dimensions.

It offers detailed technical data and calculations for various fields such as fluid mechanics, material properties, HVAC systems, electrical engineering, and more.

Calculate water flow rates through pipes of various sizes and determine velocity, pressure requirements, and system performance. Available in both Imperial and metric units.

Calculate flow rates, pressure drops, velocity and more for fluid flow in pipes. Now with system curve analysis and local resistance calculations.

Calculate pipe flow with our Pipe Flow Calculator. Easily determine flow rate, head loss, and velocity for any application.

Pipe Flow Calculator Calculate flow rate, velocity, and pressure loss in pipe systems

What is a Pressure Pipe Flow Calculator? Definition: This calculator determines the flow velocity and flow rate in a pipe based on pressure difference, fluid density, and pipe cross-sectional area.

Quickly calculate flow rate, velocity, pressure drop, and friction loss using our pipe flow rate calculator—ideal for plumbing, HVAC, and fluid systems.

Jul 20, 2025 · A pipe flow calculator is an online tool designed to estimate the flow rate, velocity, and cross-sectional area of fluid moving through a pipe based on several input parameters.