Water Project Calculator is a user-friendly and versatile app designed by practicing water engineers to assist with everyday problem-solving. This free Android app is primarily intended for back-of-the-envelope calculations but is so intuitive that it can be used on your computer as well. With its simple interface, the app allows you to enter a list of parameters in a single system of equations, and it immediately solves for the unknowns.

The app consists of four main sections: Gravity Flow, Pressure Pipe Flow, Financials, and Unit Converter. The Gravity Flow section utilizes the Manning Formula, while the Pressure Pipe Flow section employs the Hazen-Williams Equation. The Financials section is helpful for estimating project costs and comparing payment options, and the Unit Converter provides conversions for various units of measurement.

One of the standout features of Water Project Calculator is its ability to handle different unit systems. You can enter and display each parameter in any supported unit, allowing for easy mixing and matching of metric and US customary units. Switching between units is seamless and can be done with just a few taps.

Moreover, the app enables you to solve each system of equations using any of the parameters as inputs. This flexibility allows you to set values for any known parameters and solve for the remaining unknowns, making your calculations more efficient.

To get a better idea of how the app works, you can watch a short demonstration video. If you have any suggestions for improvement or feature requests, the developer encourages you to provide feedback.

Water Project Calculator is an invaluable tool for water engineers, providing them with a convenient way to perform calculations and solve problems. Its intuitive interface, versatile unit handling, and flexible equation solving make it a must-have app for professionals in the field.