Simple algebraic equation for hanging paintings:

X/2 - H + 57 = Y

X = the height of the painting, divide height by 2.
H = the distance from the hanger to the top of the painting, subtract this distance from (X/2).

Add 57 to (X/2 - H)  any  number  can be added to establish the desired mid-point height of the painting.

Y =  the number of inches from the floor to hang the painting.


A link to an algebra Calculator