| The best way to come by true tension given scale length and tuning is to know the mass of the string per inch of a full winding.
There is only one company that has been forthcoming with that information and that would be D'Addario.
Much like bass cabinets, you are faced with having to take their word on it as they don't provide the data to do the math yourself.
That said, the D'Addario tension chart is pretty close for most manufacturers as there are only slight variations where mass is concerned in string construction.
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