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1.0.1 — Offline pipe flow (Darcy–Weisbach / Hazen–Williams). Pro via Play Billing (pro.yearly).
Offline pipe FLOW calculator: diameter, velocity, Reynolds, Darcy and Hazen.
FLOW is an offline pipe flow rate calculator for water in round, full pipes. Size a run from inner diameter, length, and material — or invert a frictional pressure drop to estimate flow. There is no live hardware and no system-online dashboard. What you can calculate • Continuity: Q = A·v (flow from velocity or velocity from flow) • Darcy–Weisbach head loss with a Churchill friction-factor approximation and a commercial roughness table • Hazen–Williams (water) as a comparison method • Reynolds number and laminar / transitional / turbulent band • Velocity warnings when the mean speed is low, high, or excessive • Unit toggles: L/min, m³/h, GPM · mm/inch · bar/psi/kPa · m/ft Save named scenarios on the device and share a text summary (FLOW Pro). Charts are educational plots of the current inputs — not 24-hour telemetry. FLOW Pro (soft yearly unlock, pro.yearly) • Unlimited saved scenarios (free tier keeps 3) • Custom roughness ε and Hazen–Williams C • Extra materials and Darcy vs Hazen comparison • Share/export and educational charts Educational disclaimer Results are estimates for straight circular water pipes. They omit fittings, elevation, pumps, and code tables. FLOW is not a licensed plumbing or engineering stamp. Subtitle: Pipe GPM Plumbing In-app brand: FLOW Category: Tools