What to Measure

1Container interior dimensions — length, width, and depth measured from inside wall to inside wall, not the exterior.
2Container opening size — many containers have openings smaller than their interior, which limits what you can insert.
3Item dimensions including packaging — if the item has padding, bubble wrap, or a box, measure the packaged dimensions.
4Weight limits — suitcases have airline weight limits (50 lbs), shipping boxes have carrier limits, and bags have structural limits.

Common Mistakes to Avoid

Measuring the exterior of the container instead of the interior — walls, padding, and structure reduce usable space by 1–3 inches per side.
Not considering the opening constraint — a suitcase may have 28" of interior depth but only a 24" opening width.
Forgetting about item flexibility — soft items compress, but rigid items must fit exactly through the opening.
Ignoring weight limits — a container may have enough space but exceed the weight limit for airlines, shipping, or structural integrity.

Frequently Asked Questions

How do I measure the inside of a suitcase?

Open the suitcase fully flat and measure length, width, and depth from the inside walls. The depth is the distance from the bottom lining to where the zipper closes. Don't include exterior handles, wheels, or frame in your measurements.

What is the standard carry-on suitcase size?

Most airlines allow carry-on bags up to 22" × 14" × 9" (including handles and wheels). The interior usable space is typically 20" × 13" × 8" — about 2,080 cubic inches.

How do I calculate if an item fits in a box?

Measure all three dimensions of both the item and the box interior. Each item dimension must be less than or equal to the corresponding box dimension (length ≤ box length, width ≤ box width, height ≤ box height). Try all orientations if the first doesn't work.

ItemFits

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Will It Fit in Your Container?

Select a container type below for a quick check, or enter custom dimensions to test any container.

CONTAINERPACKINGFIT CHECK

This calculator determines if items will fit in suitcases, bags, boxes, and other containers. We account for interior dimensions, opening constraints, and packing orientation — covering luggage, shipping boxes, storage bins, and specialty containers.

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Will It Fit in a Suitcase?Check if your items will fit in a suitcase. Compare carry-on, checked, and large suitcase dimensions for packing.Will It Fit in a Bag?Check if your items will fit in a backpack, duffel bag, or tote. Compare bag dimensions and capacity for packing.Will It Fit in a Box?Check if your item will fit in a shipping box or storage box. Find the right box size for USPS, UPS, FedEx, and Amazon returns.What Size Box Do I Need for Shipping?Find the right box size for your item. Enter dimensions for a recommendation from standard shipping box sizes.What Size PODS Container Do I Need?Calculate the right PODS or portable moving container size. Enter your items for a recommendation based on real packing math.What Size Dumpster Do I Need?Calculate the right dumpster size for your renovation, cleanout, or demolition project. Get a recommendation based on debris type and volume.

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What to Measure

1Container interior dimensions — length, width, and depth measured from inside wall to inside wall, not the exterior.
2Container opening size — many containers have openings smaller than their interior, which limits what you can insert.
3Item dimensions including packaging — if the item has padding, bubble wrap, or a box, measure the packaged dimensions.
4Weight limits — suitcases have airline weight limits (50 lbs), shipping boxes have carrier limits, and bags have structural limits.

Common Mistakes to Avoid

Measuring the exterior of the container instead of the interior — walls, padding, and structure reduce usable space by 1–3 inches per side.
Not considering the opening constraint — a suitcase may have 28" of interior depth but only a 24" opening width.
Forgetting about item flexibility — soft items compress, but rigid items must fit exactly through the opening.
Ignoring weight limits — a container may have enough space but exceed the weight limit for airlines, shipping, or structural integrity.

Frequently Asked Questions

How do I measure the inside of a suitcase?

What is the standard carry-on suitcase size?

Most airlines allow carry-on bags up to 22" × 14" × 9" (including handles and wheels). The interior usable space is typically 20" × 13" × 8" — about 2,080 cubic inches.

How do I calculate if an item fits in a box?

Explore Other Fit Calculators

Will It Fit Through Your Door?Instantly check if your furniture will fit through a doorway. Enter door dimensions and item measurements to get a 3D fit analysis with clearance calculations.Will It Fit in Your Vehicle?Check if your items will fit in a car, SUV, or cargo van. Enter vehicle cargo dimensions and item measurements for an instant 3D fit analysis.Will It Fit Up Your Stairs?Check if your furniture will fit up or down stairs. Enter staircase dimensions for 3D analysis of clearance, turning radius, and landing space.Will It Fit in the Elevator?Check if your furniture will fit in an elevator. Enter elevator cab dimensions and item measurements for instant 3D clearance analysis.Will It Fit Through the Hallway?Check if your furniture will fit through hallways, around corners, and through narrow passages. Free hallway clearance calculator.Will It Fit in Your Room?Check if furniture will fit in your room. Enter room dimensions and item measurements to see layout options, walking clearances, and door swing zones.Will It Fit Through a Window?Check if your furniture will fit through a window opening. Free calculator for high-rise moves, tight-access deliveries, and hoisting scenarios.

Will it fit in your box, crate, or container?

Item dimensions vs. interior capacity — with packing orientation suggestions.

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