Planners often need a fast answer to “how many boxes fit in a 40ft container?” before they commit carton specs, FOB quantities, or freight spend. The honest answer is a range tied to carton dimensions, weight, and whether you floor-load or palletize—not a single integer that works for every SKU.
This guide gives reference tables, a step-by-step calculation method, and links to deeper reads on 40ft high cube dimensions and how many pallets fit in a 40ft container when your load is palletized instead of loose cartons.
For instant, SKU-specific counts with weight checks, try Palletizr’s container loading calculator (open the app at app.palletizr.com).
40ft container quick reference
Internal dimensions below are typical ISO dry van figures used for planning. Always confirm with your carrier or equipment release notes—SOC boxes and reefers can differ.
| Container type | Internal L×W×H (cm) | Volume (m³) | Max payload (kg) | Pallet capacity (approx.) |
|---|---|---|---|---|
| 20′ standard | 589 × 234 × 239 | 33.1 | 28,200 | 10–11 pallets |
| 40′ standard | 1203 × 234 × 239 | 67.5 | 26,680 | 22–24 pallets |
| 40′ high cube | 1203 × 234 × 269 | 76.2 | 26,460 | 22–24 pallets |
| 45′ high cube | 1351 × 234 × 269 | 85.7 | 25,600 | 24–27 pallets |
Headline for cartons: a standard 40′ dry container (about 12.03 m × 2.34 m × 2.39 m, 67.5 m³) often holds on the order of 22–24 pallets or roughly 1,000–2,000+ cartons when floor-loaded—depending entirely on carton size and stack height.
Common carton sizes and theoretical fit
These figures assume full rectangular utilization of interior length, width, and height. They are theoretical maximums—useful for benchmarking, not for quoting customers without validation.
| Carton size (cm) | Cartons per 20′ | Cartons per 40′ | Cartons per 40′ HC |
|---|---|---|---|
| 60 × 40 × 40 | 340 | 700 | 790 |
| 50 × 40 × 30 | 570 | 1,170 | 1,320 |
| 40 × 30 × 30 | 1,050 | 2,160 | 2,430 |
| 30 × 30 × 20 | 2,340 | 4,810 | 5,420 |
Real-world loading usually lands around 85–92% of theoretical cube because of pallet gaps, doorway geometry, dunnage, lash corridors, mixed heights, and payload limits that bind before volume.
How to calculate container loading (carton / box loads)
- Measure each carton — length × width × height (cm) and gross weight (kg).
- Select equipment — 20′, 40′, 40′ HC, or 45′ HC based on cube and port lane.
- Test all six orientations of each carton footprint in the container grid.
- Check payload — sum of carton weights must stay under the container’s max payload (and any shipper line limits).
- Add pallets if used — standard pallet footprint is often 120 × 100 cm; pallets consume cube but simplify handling.
Spreadsheets handle simple single-SKU cases. Multi-SKU mixes, irregular gaps, and stack rules are where 3D loading optimization with Palletizr saves rework: algorithms test many configurations and produce visual load plans for warehouse teams.
Boxes vs pallets: which guide should you read?
| Your load | Start here |
|---|---|
| Floor-loaded cartons / mixed carton sizes | This article + calculator |
| Standard pallets (Euro, block, CHEP) | How many pallets fit in a 40ft container |
| Equipment specs & weight terminology | 40ft high cube dimensions & limits |
Frequently asked questions
How many boxes fit in a 40ft container?
A 40ft standard container (about 67.5 m³ internal) can hold roughly 700–5,000+ cartons depending on carton size. Example: 60×40×40 cm cartons often land near ~700 units in a 40′ box in simplified grid math. Use Palletizr for exact counts with your dimensions and weight.
What is the capacity of a 40ft high cube container?
A 40ft high cube is typically 12.03 m × 2.34 m × 2.69 m (76.2 m³) with max payload around 26,460 kg. The extra height versus a standard 40′ adds roughly 13% more volume—helpful for tall cartons or stack height, not automatically more weight allowance.
How do I calculate container loading?
Measure cartons, pick container type, evaluate all orientations, verify total weight ≤ payload, then adjust for pallets and real clearance. Software such as Palletizr automates orientation search and multi-SKU packing for operations teams that ship regularly.
Source: adapted from Palletizr AEO content playbook (marketing/distribution-strategies/strategy4_aeo). Published to the blog 2026-05-22.