Weir Open Channel Flow Calc

V-Notch Rectangular Cipolletti

$4.99 · Designed for iPad. Not verified for macOS.

0.4ft of head on a 90-degree V-notch - what is the flow in GPM? V-notch, Francis rectangular, Cipolletti weirs output CFS, GPM, MGD, m3/s, L/s. $1.99 one-time, no login. Need to measure open-channel flow at a weir and get results in CFS, GPM, or MGD without hauling out reference tables? Select V-Notch, Rectangular (Francis), or Cipolletti weir type, enter the head measurement, and get instant flow calculations in five unit systems. Supports V-Notch (adjustable notch angle: 22.5, 30, 45, 60, 90, 120 degrees), Rectangular with end contractions (Francis formula), and Cipolletti trapezoidal weirs. FLOW OUTPUT UNITS: - CFS (cubic feet per second) - GPM (gallons per minute) - MGD (million gallons per day) - m3/s (cubic meters per second) - L/s (liters per second) KEY FEATURES: - Three weir types in one app - Adjustable notch angle for V-Notch weirs - End contraction settings for rectangular weirs - Instant results as you type - Works completely offline - No account or login required Essential for hydrology field work, stormwater monitoring, irrigation measurement, and water resources engineering.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Added a More Pro Tools section to discover related field calculators.

Version 1.0.2

The developer, Shanghai Sheyuan Network Technology Co., Ltd., 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    990.2 KB
    Category
    Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Sheyuan Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by Shanghai Sheyuan Network Technology Co., Ltd.