Venturi tube and nozzle calculators are available on pipeflowcalculations.net web site that works like web application without the need to install and use plug-in.
You can find calculators at:
Venturi tube and Nozzle calculator
Tell me what do you think about them using contact page on the same web site. I hope you will like it!
Venturi tube and nozzle calculators available
Venturi tube and nozzle calculators available
Pipe flow calculations - since 2000