FlowStack: Process & Hydraulics Calculators (Pipe Sizing, Pressure Drop, Pumps & NPSH)

FlowStack process and hydraulics calculators by Aienginear: properties, line sizing, pressure drop, pumps, valves and meters

FlowStack by Aienginear: 13 free process and hydraulics calculators for line sizing, Darcy-Weisbach pressure drop, pump NPSH, control valves (IEC 60534) and ISO 5167 flow meters, with a quick line and NPSH checker.

Free Engineering Calculators: 33 Process, Piping & Mechanical Tools

Free engineering calculators by Aienginear: 33 process, piping, pressure integrity and energy tools

33 free engineering calculators from Aienginear for pipe sizing, pressure drop, PSV relief, ASME VIII vessels, control valves, flow meters, flange torque and hydrotests. Printable, standards-referenced, no signup.

Fluid Flow & Pipe Sizing Calculator: Pipe Size, Pressure Drop, Gas & Two-Phase Flow (2026)

Free Aienginear fluid flow and pipe sizing calculator: recommends the line size from velocity and pressure-gradient limits, with Darcy-Weisbach and Colebrook-White pressure drop, gas pipeline equations, compressible and two-phase flow, 3-K fittings, pump NPSH, slurry and API RP 14E erosion checks.