Open Frame Calculator

Calculations at an open frame, a frame open on one side. It is made of three rectangles.
Enter three values, but not thickness and both heights or lengths. Choose the number of decimal places and click Calculate.

	Frame thickness (c):
	Outer height (h):
	Inner height (i):
	Outer width (a):
	Inner width (b):
	Perimeter (p):
	Area (A):
	Round to   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15   decimal places.

Thickness, heights, widths and perimeter have the same unit (e.g. meter), the area has this unit squared (e.g. square meter).