Discounted Packaging | Custom Packaging & Printed Boxes USA / Connected packaging
Required ECT (edge crush) calculator
Edge crush strength a box needs to reach a compression target.
How it works
McKee: BCT = 5.87 × ECT × √(thickness × perimeter) in lb and inches, solved for ECT.
Tip
Real strength drops with humidity, handholes and print coverage.
Questions
Single or double wall?
Double wall is common above about 48 ECT.
Is McKee exact?
It is a well-known estimate; physical testing confirms.
Planning estimate only. Confirm sizes, strength and costs with samples and your written quote.
PLAN YOUR PACKAGING
From a better brief to a tailored quote.
Check sizing, compare materials and share your requirements. Final specifications and pricing are confirmed by the team.
Request a packaging quoteSelected delivery market: United States
Planning delivery to one of these American destinations?
New York, Los Angeles, Chicago, Houston, Miami
Add the delivery city and ZIP code to your brief. Freight, duties and delivery availability are confirmed in the quote.