BoxFit Calculator

Mode

Step 1: Choose what you want to do. Use Fit Check to test one box, or Smallest Box Finder to compare several box sizes.

Step 2: Select your measurement units. All size fields and labels will update to match your choice.

Units Inches Centimeters

Step 3: Enter your box size manually, or pick a preset and apply it. Use exterior thickness so the calculator can estimate usable interior space.

Length	Width	Height	Exterior Thickness	Action
in	in	in	in

Length

Width

Height

Exterior Thickness

If using exterior dimensions, input the width of the box so that we're calculating the interior space only.

Step 3 (Finder Mode): Add each box size you are considering buying. The tool will rank them and choose the smallest that fits everything.

Length	Width	Height	Action

Step 4: Add each product size and how many of that product go in the shipment.

Length	Width	Height	Quantity	Action

Step 5: Click Calculate to see whether your items fit and how efficiently the box space is used.

Step 6: Review the result summary, then check the visualizer to confirm your item arrangement.

Run a calculation to see results.

Rank	Candidate	Volume	Fits	Efficiency

Item	Copy	Position (x, y, z)	Orientation (L x W x H)