Flow Calc™
Open Channel Flow

Open channel flow is the movement of water with a free surface exposed to atmospheric pressure, such as in rivers, streams, roadside ditches, storm drains flowing partially full, and irrigation canals. Flow Calc™ is a robust and advanced software application designed to perform open channel flow calculations using the Manning Equation. It supports irregular channel geometries under steady uniform flow conditions, including circular and elliptical pipes. Flow Calc™ is widely used by civil engineers as an efficient tool for generating calculations and producing high-quality, professional reports.

Irregular Channels, Circular and Elliptical Pipes, Rating Tables, and Professional Reports

Intuitive and interactive user interface

Flow Calc™ Features

Intuitive interactive user interface while delivering complex computational results using the Manning's Equation.

  • Flow vs. Depth Rating Tables
  • Calculate Irregular Channels
  • Calculate Circular Pipes
  • Calculate Elliptical Pipes
  • Professional Reports
  • Save Reports as PDF
  • Watermarks on Reports
  • Useful Wizards
  • Batch Printing
  • Export Calculations
  • Expression Builder
  • Windows® 10/11 Compatible

Software Security / Licensing

To provide greater flexibility, licenses may be transferred between workstations using the online License Management tool, making it easy to switch devices or work from different locations. Licenses are activated immediately upon purchase and provide instant access to the software.

Microsoft® Store Download

To ensure security, authenticity, and ease of maintenance, this software is distributed exclusively through the Microsoft® Store. Fully compatible with Windows® 10 and Windows® 11, all installations and updates are managed through Microsoft's trusted ecosystem for a seamless user experience.

Flow Calc™ Training Videos

As part of the continued commitment to helping users and engineers get the most out of Flow Calc™, visit the the Flow Calc™ YouTube Channel for training and tutorial videos.

AutoCAD Civil 3D Integration with Flow Calc™

This video demonstrates how to integrate AutoCAD Civil 3D with Flow Calc™ for seamless data exchange and collaboration.

Flow Calc™ Batch Printing

This video shows how to use the batch printing feature within Flow Calc™ to efficiently print multiple documents at once.

Like, Subscribe, and Turn on Notifications

To ensure you don't miss any upcoming content, please subscribe to and connect with the Flow Calc™ YouTube Channel.

Discover the right price plan for you

Flow Calc™ is available through a subscription-based licensing model offered in non-recurring one-month and one-year terms. The subscription period begins at the time of purchase and provides access to the latest software updates, new features, ongoing improvements, and technical support. This licensing approach also helps support the continued development and enhancement of the platform. To provide greater flexibility, licenses may be transferred between workstations using the online License Management tool, making it easy to switch devices or work from different locations. Licenses are activated immediately upon purchase and provide instant access to the software. As a result, all purchases are final and non-refundable. Please review your subscription plan selection carefully before completing your purchase. Licenses are non-renewable and cannot be extended. To continue using Flow Calc™ after a subscription expires, a new license must be purchased for the desired subscription plan.

Purchase with confidence from secure online ordering through PayPal®.

One License
Regular Pricing

$

Key features:
  • Fast and intuitive hydraulic calculations
  • Affordable alternative to complex engineering software
  • Instant access to all software features
  • License transfers included
  • Free updates and improvements

Two Licenses
Save Additional 10%

$

Key features:
  • Fast and intuitive hydraulic calculations
  • Affordable alternative to complex engineering software
  • Instant access to all software features
  • License transfers included
  • Free updates and improvements

Three Licenses
Save Additional 20%

$

Key features:
  • Fast and intuitive hydraulic calculations
  • Affordable alternative to complex engineering software
  • Instant access to all software features
  • License transfers included
  • Free updates and improvements

See what our users have to say about it

Thanks John, love that you're making this product!

Civil Engineer, Nevada

I’ve said this before but it bears repeating…..you are doing God’s work with this. The impact reaches farther and wider than you can imagine.

Civil Engineer, Colorado