NPSH Calculator
NPSH available - fitting loss
$3.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.
NPSH Calculator helps pump engineers, designers and operators quickly estimate suction line head losses and Net Positive Suction Head (NPSH) available.
Start on the Home screen by entering the pipe data used for head loss calculations: length, flow, internal diameter, pipe material and Hazen–Williams roughness C. Add local losses with the intuitive Fittings screen, where you can add or remove common fittings such as elbows, valves, contractions and foot valves, and see the total fitting coefficient used in the calculation.
On the NPSH screen, enter water temperature, site altitude, suction static head and the safety margin you want to apply. The app then calculates:
• Flow velocity in the suction pipe
• Friction loss in the pipe
• Minor losses due to fittings
• Total suction head loss
• Atmospheric head, vapor pressure head and applied safety margin
• NPSH available at the pump suction
Results are shown in a clear, scrollable summary that separates input values, head loss results, NPSH inputs, NPSH available and the list of fittings used in the calculation. Explanatory tooltips and on-screen NPSH guidance help students and junior engineers understand where each term comes from and how it affects pump performance.
You can switch between US and SI units at any time (ft / gpm / in / °F or m / L/s / mm / °C), and all inputs and results are updated to the selected unit system for consistent, error-free work.
Use NPSH Calculator as a fast design and troubleshooting aid when sizing suction lines, reviewing pump selections or checking whether NPSH available comfortably exceeds the NPSH required by the pump manufacturer.
Note: This app is intended for preliminary calculations and educational use. Always confirm final designs and pump selections with a qualified engineer and the pump manufacturer.
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The developer, Transparent Blue Water LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- Transparent Blue Water LLC
- Size
- 36.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- NPSH Industrial $4.99
- Copyright
- © 2025 Alejandro Escandon