The McKee formula estimates box
compression strength or the maximum load a box can stand for a
moment. If you enter ECT grade along with the caliper of the combined
board and the length, width and depth of the box, the McKee formula
calculates a theoretical compression value for your box. You can
get ECT grades and calipers off the table in Box Performance
Complete the form below, then click
'Calculate' for your McKee values.