Santoor String Calculator
Modern Indian santoors have 31 sets of strings and can be tuned a variety of ways. If they aren't strung right for the way it's being tuned strings may break or put undue stress on the instrument. This calculator lets you figure out what strings should be used where and warns you if you are going to run into problems.
Graphs showing the tension required to produce a range of notes for several string diameters are also included at the bottom of this page, showing the point at which they will break.