Pipe Sizer vs Pipe Sizing

PipeSizer helps you quickly choose the right pipe diameter for water systems — for both pressure and gravity flow. PRESSURE PIPE SIZING • Size pipes from a target flow rate. • Set your maximum friction rate and velocity limits. • Calculations based on the Hazen-Williams equation. GRAVITY PIPE SIZING • Size pipes from a target flow rate. • Evaluate flow capacity and velocity under gravity conditions. • Calculations based on the Manning equation. KEY FEATURES • Automatic recommended pipe size based on your limits. • Multiple pipe materials with built-in coefficients (more added over time). • Works in both SI and Imperial (I-P) units. • Designed for engineers, plumbers, and irrigation/drainage design workflows. Feedback is welcome — it directly shapes upcoming updates.

Pipe Sizing is an intuitive and capable utility for engineers, technicians, and students who need to determine optimal pipe dimensions. Calculate pipe sizes effortlessly based on volumetric flow, mass, density, volume, time, or flow rate—perfect for quick estimations or more refined scenarios. After selecting an initial diameter, you can instantly recalculate fluid velocity at a fixed flow or adjust the flow rate for a defined velocity. With Pipe Sizing, you can run quick calculations for a single pipe or build a collection of pipes for a specific project, making it easy to scale from simple setups to more complete designs. Designed for both macOS and iOS, this app supports a wide array of languages and requires no data collection. Whether you're doing simple sizing tasks or managing multiple pipes in a project, Pipe Sizing streamlines your workflow, ensures consistency, and helps you document your design choices.