Measure the opening · USA guide
Will it fit through the container doors?
An item can fit inside a container yet fail to pass through its doors. Compare the packed object and its handling method with the actual opening.
Reviewed
By the ContainerFox editorial team. Research, limits and corrections.
Read the plain-text guide (Markdown)
Measure the loading orientation
Include pallets, skids, packaging and protruding parts. Identify anything that must remain upright. External width and roof height are not the door opening dimensions; obtain the proposed unit’s actual clear aperture.
The tool checks an upright rectangular cross-section against reference fleet dimensions. It subtracts your side and overhead allowances. Blank inputs stay unknown; zero deliberately models no allowance.
Compare sizes and check a door opening
Enter measurements in inches. Use a decimal point, with up to three decimals and no thousands separators. A single comma is interpreted as a decimal separator: 1,234 means 1.234, while 1234 means one thousand two hundred thirty-four. Write fractional inches as decimals, for example 0.125 for ⅛ in. A blank remains unknown. Enter 0 only for a known zero. The limit per field is 787.401 in. Item width and height must be greater than zero.
Changing units preserves the saved measurements. Converted input displays may be rounded; they replace the saved value only if you edit them. Blank or invalid entries stay unchanged.
Hapag-Lloyd 22 G1 fleet example. Confirm the specification of the actual unit.
| Size | Outside | Inside | Door |
|---|---|---|---|
| 20ft standard | 19 ft 10.5 in × 8 ft × 8 ft 6 in | 19 ft 4.3 in × 7 ft 8.6 in × 7 ft 10.3 in | 7 ft 8.1 in × 7 ft 6.2 in |
| 40ft standard | 40 ft × 8 ft × 8 ft 6 in | 39 ft 5.7 in × 7 ft 8.6 in × 7 ft 10.3 in | 7 ft 8.1 in × 7 ft 6.2 in |
| 40ft high cube | 40 ft × 8 ft × 9 ft 6 in | 39 ft 5.7 in × 7 ft 8.5 in × 8 ft 10.3 in | 7 ft 8.1 in × 8 ft 6.2 in |
Upright rectangular cross-section only. No rotation, ramp, turning path, forklift, floor loading or lifting assessment. Zero spare clearance means an exact mathematical fit, not practical loading approval.
Your entries remain in this page until you choose to add them to the editable quote form. That click does not send a request.
Try it: support and top clearance can rule out entry
Hypothetical demonstration. These inputs are chosen to explain the calculation; they are not a supplier quote, field test or inspection.
Select the 20ft standard reference and inches. Enter item width 90, item height excluding support 87, support height 3 and clearance each side and above 1. The tool subtracts two side margins, but only one top margin.
The item height alone is below the reference opening, but the item, support and top margin require 91 in. The calculated spare height is -0.76378 in: it exceeds the opening. A positive width remainder does not cure that failed height check.
Do not remove a handling or clearance requirement simply to make the result pass. Confirm the actual opening and the loading arrangement with the supplier; this upright cross-section check does not model rotation or a forklift path.
| Input or result | Value and interpretation |
|---|---|
| Reference door width × height | 7 ft 8.1 in × 7 ft 6.2 in |
| Item width / height | 90 in / 87 in (7 ft 6 in / 7 ft 3 in) |
| Support / clearance | 3 in / 1 in (3 in / 1 in) |
| Spare width after both margins | 0.125984 in |
| Spare height after support and top margin | -0.76378 in |
| Cross-section result | Exceeds the reference opening |
Include the approach and equipment
A pallet jack, forklift, ramp or lifting frame changes the arrangement. Assess the threshold, ramp angle, turning space, mast height and floor loading with the handling provider. Geometric clearance does not approve a lifting or driving maneuver.
For daily access, consider the door swing, snow clearance and space to move goods after entry. A side-opening unit can suit a different routine, but its clear aperture and structure still need confirmation.
Resolve conflicts before ordering
If the reference check fails, discuss another orientation, dismantling, size or opening with the supplier. This calculator does not rotate objects or calculate their path. A passing result still needs confirmation against the actual unit and safe handling plan.
Questions before you choose
Is zero spare clearance acceptable?
It is an exact mathematical fit only. Tolerances, alignment and practical handling need an appropriate allowance.