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I need a Windows calculator software that is able to solve simple equations like ohm's law:

U = R.I

Where I can input R and I values and it pops out the U value. Of course, this simple equation is just an example. I will be using it with equations more complex with more than 5 variables.

It's important that the software is free, and if possible portable too.

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  • Do you need to solve the equations before inputting? i.e. Is it likely that you enter R and U, and need the software to solve the equation with respect to I? Which operative system do you want this to run on? Could you give an example of an equation with some more variables, and how you want it handled?
    – holroy
    Commented Sep 15, 2015 at 18:12
  • Will be used on Windows. I want to define the entire equation, provide some variable values, and solve it for a given variable. Another example: br=(uclkdiv/1+(mul/div))/16*val, then I will input some variables leaving the only interested one to be solved by the software.
    – RHaguiuda
    Commented Sep 15, 2015 at 20:31

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Well in principle, if I get your question right, you could use any programming language for your application. You would create a script where you define some variables with values at the beginning, and then perform the calculations you want to so.

Might be a bit of overkill, but you can have look at Python(x,y). It's a collection of Python modules that can be installed easily, and comes with a nice user interface for the Python programming language, which might helps you getting started more easily. Plus, the Python programming language is very useful in many areas, so I think it's never a failure to have a look at it, anyways :-)

Good luck!

edit: I don't know if there is a portable version by the way, but at least Python can be run on many many platforms!

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