HydroCalc Plus

The COMPLETE version of HydroCalc, with what the free app doesn't have: the FITTINGS SELECTOR. Pick elbows, valves, tees and reducers piece by piece and the app computes minor losses for you — in the calculator, the inverse calculator and the system curve. No K-value tables, no transcription errors.

ALL INCLUDED: pump power, system curve, pipe database and Darcy-Weisbach with real fluids come with the app. One purchase, no in-app purchases.

Professional hydraulic engineering tool for calculating pressure losses in piping systems. Essential for engineers, plumbers, and contractors designing water distribution networks.
Key Features:

Calculate friction head losses using industry-standard Hazen-Williams equation
Support for both US (ft, gpm, psi) and SI (m, lps, bar) units
Pipe material library with pre-defined roughness coefficients (C-factors)

Fittings and valves database including elbows, tees, valves, contractions, and expansions

Inverse calculations to determine pipe diameter, flow rate, or length for target head loss

Real-time results showing velocity, friction loss, minor losses, and total system head loss

What Sets Pro Apart:
Unlike basic calculators, HydroCalc Plus accounts for both major losses (pipe friction) and minor losses (fittings and valves). The app includes a database of K-factors for various components, allowing accurate total system pressure loss calculations.

Perfect For:

Water supply system design
Irrigation network planning
HVAC piping calculations
Fire protection systems
Industrial fluid transport
Educational purposes in hydraulic engineering

Technical Capabilities:
The app considers all critical factors affecting pressure loss: flow velocity, pipe diameter, internal roughness, pipe length, and fitting configurations. Materials include PVC, polyethylene, steel, cast iron, concrete, and more with accurate C-factors ranging from 120-150.

Inverse Calculation Mode:
Unique feature allowing backward calculations - determine required pipe size for allowable head loss, maximum flow capacity, or optimal pipe length for your system constraints.
Simple, intuitive interface with instant results. No internet connection required.


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WHICH ONE IS FOR ME?

► HydroCalc Plus (this app)
The complete version for daily professional work, with the fittings selector.

► HydroCalc (free app, separate)
To get started: head loss with a manual K value, and advanced modules as an optional purchase inside that app.

Note: they are independent apps — buying one does not unlock the other.
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Recent changes:
Performance improvements and minor fixes.