Home / OpenFlows FlowMaster

OpenFlows FlowMaster

OpenFlows Software Logo White

OpenFlows FlowMaster

Hydraulic Calculator Software

Solve-for-anything hydraulic toolbox

Solve for any unknown property, design for any desired characteristic, and produce detailed reports and rating curves on the fly.

What is OpenFlows FlowMaster?

OpenFlows FlowMaster helps you perform hydraulic calculations for dozens of element types, from pipes and open channels to drop inlets and weirs. Improve design productivity and ultimately save project costs. OpenFlows FlowMaster’s interface is simple enough to be the easiest model you have ever used, yet so powerful, you will be solving real problems in just minutes.

Pressure pipe design

Perform a quick check or design by plugging in the known information and automatically solving for pipe length, start-and-stop elevations and pressures, discharge, diameter, and roughness.

Inlet and Gutter 

Design and analyze grate, curb, ditch, slotted, and combination inlets using calculations based on the FHWA Hydraulic Engineering Circular No. 12 and Circular No. 22 methodologies. 

Open Channel

Design and analyze channels, ditches, and free surface pipes of any shape including circular, box, elliptical, parabolic, and irregular channels.

Weir and orifice modeling

Size weirs considering discharge, weir coefficients, and crest, headwater, and tailwater elevations for the following types: rectangular, V-notch, Cipolletti, broad crested, or custom size.

OpenFlows FlowMaster Computer Software Screen Mockup

OpenFlows FlowMaster

  • Design and analyze dozens of element types, such as pressure pipes, open channels, weirs, orifices, and inlets
  • Replace the error-prone spreadsheet process for reliable calculations on a wide variety of hydraulic elements

*Prices vary per region. For more options, see licensing and subscriptions section.


OpenFlows Software Resources

Frequently Asked Questions

FlowMaster is an efficient calculator for performing pressure pipe design as well as designing and analyzing inlets, gutters, open channels, weirs, and orifices. Replace the error-prone spreadsheet process and switch to FlowMaster for reliable calculations on a wide variety of hydraulic elements.

The price of OpenFlows FlowMaster varies per region. While there are various types of licensing available, a common choice is the 12-month practitioner license offered through Bentley’s eStore. When you purchase through the eStore, you get a Virtuoso Subscription. This means you get the software and “Keys” (tokens) to redeem for customizable training, mentoring, and consulting services.

No, FlowMaster is a stand-alone calculation tool. You can use FlowMaster to check calculations at specific cross sections.

Engineers use FlowMaster to check calculations at specific cross sections. SewerGEMS is used to analyze the entire drainage network.

As per minimum operating system requirement

Operating System
Windows 10, Windows 8/8.1, Windows 7 SP1 (32 & 64-bit for all), Server 2088/R2, Server 2012

As per minimum operating system requirements

Hard Disk
150 MB of free storage space (with additional room for data files)

The most updated information about platform compatibility can be found on the Bentley Communities website.

Licensing and Subscription options

Choose What is Right for You

One-year license with training

Virtuoso Subscription – A popular choice for small and medium-sized businesses

Get access to software that comes with training – fast! Bentley’s eStore, Virtuosity, offers a convenient way to lease a 12-month license of Bentley software for a low, upfront cost. Every online purchase through Virtuosity comes as a Virtuoso Subscription that includes training and auto-renewals.

With no contract required, it’s easy to get started quickly.

Shop Now

One-time purchase with support

Perpetual License with SELECT

A perpetual license of Bentley software is a one-time purchase, with a yearly maintenance subscription, called SELECT. This includes 24/7/365 technical support, learning resources, and the ability to exchange licenses for other software once a year. With SELECT, you will benefit from:

  • License pooling, so you can access your software from multiple computers.
  • Access additional Bentley software with Term Licenses, which allow you to pay for what you use without the upfront cost of purchasing a perpetual license.

Annual renewal quotes are delivered directly to your inbox, and our experienced Renewal Representatives are available to answer your questions and guide you through any changes you’d like to make.

Contact Us

Enterprise Organizations

We’ve got your back

For larger organizations with in-depth requirements, we offer plans to provide global pricing and access to our comprehensive portfolio of solutions and success plan services. Contact us about how to get access to software, global best practices, implementation services, training, and technical support to help your organization realize its full potential while addressing your unique needs.

Contact Us

Best-Selling Water Resources Textbook

Computer Applications in Hydraulic Engineering

This fully updated 9th edition textbook is available for download! Ideal for engineers and students in hydraulics and hydrology, offering theory and real-world applications with problem-solving and modeling exercises featuring OpenFlows WaterGEMS, HAMMER, SewerGEMS, SewerCAD, PondPack, StormCAD, FlowMaster and CulvertMaster.

Solve hydraulic calculations in just minutes

Celebrate Infrastructure Delivery & Performance Excellence

The 2024 Year in Infrastructure
and Going Digital Awards

Nominate a project for the most prestigious awards in infrastructure! Extended deadline to enter is April 29th.