Developer, Designer and Mechanical Engineer -
Zoran Savović


me Born in 1973 in Kula, Serbia. I grew up and was educated in Novi Sad. I graduated from the Faculty of Mechanical Engineering at the University of Novi Sad, Department of Energy and Process Engineering, majoring in Hydropneumatic Engineering, in 1997.


Oracle Java Programmer Associate I started doing web design and web programming in the late nineties. I confirmed my Java programming competencies by obtaining a Java Programmer Certificate.

Previous jobs

During my business career, I worked at the Faculty of Technical Sciences as an Assistant Trainee, a leading engineer at a contractor for the construction of natural gas installations and equipment, in the JSC "Oil Industry of Serbia" as the Chief Engineer for the maintenance of business facilities.

I was also member of the project management team responsible for the construction of the South Stream main gas pipeline in a section passing through Serbia.

Current job

I am currently working at "Schneider electric" as a Facility Manager responsible for operations and maintenance of business premises.


The best way to contact me is using this form.

This web site is offering pipe flow calculators for everyday problem solving in the field of fluid dynamics. Many desktop and online server side calculators, as well as three calculators for Android smartphone, are available now.

This web site offers a simplified resolution of less and medium complex fluid mechanics problems, primarily in the part of fluid motion and fluid dynamics.

A large number of calculators solved practical examples, theoretical explanation with corresponding equations allow finding a correct approach to solving practical problems, which we meet in every day practical work.

I am Mechanical engineer for hydropneumatic technology, with more than 20 years of engineering experience in the field of pipeline and piping design and construction, metering and regulating of gaseous and liquid hydrocarbons, water and air.

The first calculator – Venturi tube calculator was created and published on the Aug 1st, 2000 on a free domain (, which is no longer active. Since then, additional calculators – Java applets for desktop computers were created as well as 3 calculators for Android devices and several calculators that work on the server side. In addition, I have created and published a significant number of texts that are showing a theoretical background of applied fluid mechanics in calculators.

Further development of new and improvement of existing calculators, as well as new content adding, are part of the vision that this web site will become and stay default place where practical problems in the field of fluid mechanics will be solved on the simple and correct way, on a daily basis.

After the project has started in the year 2000, instantly it was a success and appreciated by a number of professionals, professors, and students. Positive comments and my commitment to Java and programming, in general, pushed the development that later followed.

During the past 20 years, I have redesigned the web site multiple times. In addition, the calculator evolved on its own from AWT to SWING, from Java applet to web start application and to native Windows application. In the meantime, I have developed also a server-side version of the calculators and all is now available under one single domain name –

In the early days, calculators were available only as online Java applets, served from the free hosting account on the Later, once the advertising program with GlobalSpec and AdSense started, I moved the web site to the paid servers with a dedicated domain name. The first domain was, and later I registered

In August 2016, when calculators started to be available for download as a Web Start Java application, I have introduced the paid subscription. Nowadays, a number of subscribed users is rising every day, I am assured that you, as my valued customers, are appreciating my work and my passion for engineering calculations and computer programming and that you are recognizing my dedication to this project.

Calculators and web site development over time

Year Month Milestone
2000 August Registered free domain
2000 August Venturi tube calculator published
2001 January Prandtl probe and Reynolds number calculator published
2005 May Orifice plate calculator published
2005 November Invited to the GlobalSpec publisher program
2005 December Registered domain on
2005 December Involved in AdSense publisher program
2006 January Pressure drop calculator published
2006 February Thermal energy calculator published
2006 February Natural gas pipeline calculator published
2006 May Register domain
2007 March LPG piping calculator publish published
2007 April Air pressure drop calculator published
2007 May Pipe diameter calculator published
2010 February Started forum on
2010 August Resistance coefficient K calculator published
2011 April Gas control valve sizing calculator published
2011 April Nozzle calculator published
2011 April Isothermal gas flow calculator published
2012 February Gas discharge calculator published
2012 August Specific gravity calculator published
2013 January Pipe diameter calculator for Android published
2013 May Reynolds number calculator for Android published
2014 January Registered account on and new domain
2014 April Combustion energy online calculators published
2015 January Heat power calculator for Android published
2015 March Android calculators redesigned and published
2015 October Pressure drop calculator, Orifice plate calculator, pipe diameter online calculators published
2015 October Combustion energy online calculator redesigned and published
2015 November Venturi tube online calculators published
2015 November Nozzle online calculators published
2015 December Delivery time online calculators published
2016 June Java applet converted to Java Web Start application with registration
2016 August Subscription plans
2017 September Calculator published as Windows application
2019 January Redesign of to JSF web application
2019 January Abandoned
2019 January Specific gravity, heat power, control valve and gas control valve online calculators published
2019 January Reynolds number, LPG flow online calculators published
2019 May Moved to Virtual private server
2019 June Pipe weight and price online calculator
2019 September Significant updates including save/open results, integrated fluid table, etc.
2019 December Export results to Word and Excel native format
2020 January Exclusive online calculators available, without ads, links, text or any other not needed content, just pure on line calculator
2020 January 12 videos with solved examples added to YouTube channel
2020 January Local resistances K factor calculator updated and upgraded
2020 January Table for multiple results store/restore updated and upgraded, with saving and opening results as well as export to Excel option
2020 January Native and Nimbus look available
2020 February Selection between absolute and gauge pressure
2020 March Tables for pipes added. 5 standards available
2020 April Natural gas calculator updated
2020 May Pipe weight online calculator updated with fluid load calculation
2020 May Pipe surface roughness selection
2021 May Calculator can be used even without Internet connection
2021 June Pipe network analysis online calculator published
2022 January Pump selection online calculator
2023 June Online natural gas calculator on
2023 July EV certificate with Sectigo
2023 August Short free trial available for new users
2024 February Pipe wall thickness calculator
2024 February Pipe material selection
2024 March Added more pipe standards and surface roughness
2024 April Flow in valves - resistance factor calculator

During this period, I have developed many custom calculators according to user’s requests. In addition, I have redesigned the web site and the calculator applet several times.