`T = (( "P" * "L" * "d" )/K)^2 [1+ f("copper")( "D" ^2/ "d" ^2 -1)]`

Enter a value for all fields

The String Tension equation calculates the pounds of tension on a piano string.

INPUTS

The inputs are as follows:

• P - pitch (Hertz)
• L - speaking length (inches)
• d - core wire diameter (mils aka `(1/1000)^s` of inches)
• A - wrap wire material, D - total wire diameter (mils)