HydroCalc

HydroCalc is a powerful yet easy-to-use mobile calculator designed for engineers, technicians, and students in the fields of hydraulic design, irrigation, water treatment, plumbing, and solar pumping systems.

With HydroCalc, you can quickly calculate head loss in pipes using the Hazen-Williams equation and account for both pipe friction and minor losses from fittings.

💧 Features:
• Calculate total head loss from pipe length, flow, diameter, and roughness
• Use SI (metric) or US units easily
• Add minor loss coefficient (K) to include fittings and valves
• See flow velocity, friction loss, and total head loss instantly
• Inverse calculations: calculate required pipe diameter, max flow, or max pipe length from a head loss limit

🔄 Inverse Calculations:
• Calculate the required pipe diameter for a given head loss
• Find the maximum flow rate allowed for a pipe
• Determine the maximum pipe length to stay under a head loss constraint

Whether you're sizing a pipeline or checking a design in the field, HydroCalc puts hydraulic calculations in your pocket.

Perfect for professionals and students working with water systems.

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WHICH ONE IS FOR ME?

► HydroCalc (this app, free)
Head loss with Hazen-Williams; minor losses are entered as a manual K value. Optional purchase inside this app — Pro Pack: pump power, system curve, pipe database and Darcy-Weisbach with real fluids, plus extra flow units and no banners.

► HydroCalc Plus (separate app)
The complete version, with the FITTINGS SELECTOR: pick elbows, valves and tees piece by piece and minor losses are computed for you. Installed and purchased separately.

Note: purchases made in this app activate here; they do not unlock HydroCalc Plus (and vice versa).
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Recent changes:
Performance improvements and minor fixes.