Stock Boxes
- Custom sizes from 4" to 47" range
- Low 100-piece minimum order quantity
- 32, 44 & 48 ECT strength ratings
ASTM D5118 Certified
ASTM D4727 Certified
CSA Class Code A Certified
The Corrugated Box Dimensions Calculator helps businesses determine exact box sizing for their products, minimizing dimensional weight charges and material waste. Explore stock and custom corrugated box options across RSC, HSC, FOL, and specialty styles, backed by ASTM-certified standards and nationwide USA shipping.
To calculate corrugated box size, measure your product's length, width, and height, then add clearance (typically 1/4" to 1/2" per dimension) for cushioning or wrapping. Use Cardboard Boxes 4 U's online Custom Box Calculator to input your exact inside dimensions and instantly receive sizing options, ECT rating recommendations, and pricing based on your order quantity.
Talk to our experts for custom solutions and tailored guidance.
Right-sized RSC and custom boxes reduce dimensional weight charges and support branded unboxing experiences.
Double and triple wall corrugated master shipping boxes protect heavy palletized freight in warehouse operations.
ASTM D4727 and D5118 compliant V3C, W5C, and V11C government spec corrugated boxes for regulated procurement.
Custom partitioned corrugated boxes for fruit jar storage and food-safe packaging across storage and distribution.
Talk to our experts for custom solutions and tailored guidance.
Choose from over 1,300 corrugated box sizes including rare configurations like Fanfold, V3C, W5C, and V11C government spec corrugated.
Products meet ASTM D5118, ASTM D4727, WRA, and MPA standards, ensuring compliance for government, military, and specialty applications.
Order custom-engineered boxes starting at just 100 pieces, with a built-in calculator tool for instant sizing and pricing estimates.
Submit your dimensions and requirements. Our team will respond with sizing recommendations, pricing, and sample availability within one business day.
To help us assist you faster, please include the reason for your message so the relevant team can reach out as soon as possible.
To help us assist you faster, please include the reason for your message so the relevant team can reach out as soon as possible.
