Quick Answer: A standard 20ft shipping container measures 6.06 m long, 2.44 m wide, and 2.59 m tall externally, with a tare weight near 2,300 kg and a maximum gross of 30,480 kg under ISO 668. Interior cube is roughly 33 m³ (1,172 cu ft) and the door opening is 2.28 m tall. Van Blanc delivers these boxes across Ontario in 1-3 days from 4 Brantford yards. The LeBlanc family has run Van Blanc Ent. Inc. since 1995, with 124+ verified Google reviews at 4.9 stars.
In This Guide
- What Are the Exact ISO 668 Dimensions of a 20ft Container?
- How Much Does a 20ft Container Weigh?
- How Much Fits Inside a 20ft Container?
- How Tall Is the Door Opening on a 20ft Container?
- Standard 20ft or 20ft High Cube: Which Do You Need?
- Can You Haul a 20ft Box on Ontario Roads Without Permits?
- What Site Prep Does a 20ft Container Need?
- How Do You Read the CSC Plate for Real Numbers?
- How Many Pallets Fit in a 20ft Container?
- Which 20ft Use Case Fits Your Dimensions?
- Frequently Asked Questions
- Reach Van Blanc in Brantford
Reading time: about 14 minutes.
What Are the Exact ISO 668 Dimensions of a 20ft Container?
A standard 20ft shipping container measures 6.06 m (19 ft 10.5 in) long, 2.44 m (8 ft) wide, and 2.59 m (8 ft 6 in) tall on the outside. Inside, usable space drops to roughly 5.89 m long, 2.35 m wide, and 2.39 m high once the steel walls and plywood floor are counted. ISO 668 fixes these figures.
The 20ft shipping container is the most-quoted unit in global trade, and ISO 668 (current edition: ISO 668:2020, seventh edition) sets its exact measurements. The external length is 6.058 m, almost always rounded to 6.06 m or stated in imperial as 19 feet 10 and a half inches. That fractional half-inch shorter than 20 feet is intentional: it leaves room for twist-lock corner castings so two 20ft units stack snug against a 40ft above them without overshooting the load-bearing rails. External width is exactly 2.438 m (8 feet flat). External height is 2.591 m (8 feet 6 inches) for the standard dry van.
Those three numbers anchor every other dimension. Inside, the container shrinks slightly thanks to the corrugated steel side walls, the 28 mm marine-grade plywood floor, the roof bow profile, and the door header beam. Internal length runs roughly 5.89 m, internal width sits at 2.35 m, and internal height comes in at 2.39 m. Anyone planning a fit-out should design from interior numbers, not external. Most disappointment with container conversions starts with the buyer assuming they have 8 feet of usable width and discovering 7 feet 8 inches once steel and paint thickness comes off.
Why ISO 668 Matters for Real Buyers
ISO 668 is the international agreement that says a 20ft box from a Shanghai port, a Dubai port, or a Halifax port will all fit the same twist-lock spreader, the same chassis, the same straddle carrier. For a Norfolk farmer or a Brampton contractor that compatibility never matters directly, but it matters every time their bin gets loaded onto a tilt-deck truck or stacked beside another box in our Brantford yard. The 6.06 m length is non-negotiable because the entire global freight system was built around it in 1968 and adjusted in ISO 668:2020 only on tolerance language, not on size. When somebody offers you a 20ft box that is actually 19 feet 6 inches, that is not a real ISO unit and you should walk away. If you want the full picture of how the 20ft sits beside every other length we stock, our rundown of every standard container length and grade lays the measurements out side by side.
Paul LeBlanc, owner: “People call asking for the 20ft dimensions like there’s a secret number. There isn’t. The outside is 6.06 by 2.44 by 2.59 metres on every honest unit in the world, because the whole freight system was built around it. I’ve been in the container trade nineteen years, forty in Asian trade before that, and the box that shows up an inch short is the box that came off a marketplace ad, not a real ISO line. Measure it in the yard before you pay.”
How Much Does a 20ft Container Weigh?
A 20ft shipping container weighs about 2,300 kg empty (the tare) and can gross up to 30,480 kg fully loaded under ISO 668. The difference between those two figures, roughly 28,000 kg, is your maximum payload.
Weight numbers are where most buyer confusion lives. Three separate values matter, and they are all printed on the CSC plate riveted to the left door:
| Weight class | Metric (kg) | Imperial (lb) | What it means |
|---|---|---|---|
| Tare weight (empty) | 2,200 to 2,400 kg | 4,850 to 5,290 lb | The container by itself, no cargo, no people |
| Maximum payload | 21,700 to 28,180 kg | 47,840 to 62,130 lb | Cargo only, calculated as gross minus tare |
| Maximum gross (ISO 668) | 30,480 kg | 67,200 lb | Container plus cargo, the legal ceiling |
| Common shipping rating | 24,000 kg | 52,910 lb | The figure many ocean carriers print, leaves more margin |
The 2,300 kg tare is the figure to memorise for a standard dry 20ft. Reefer units, with their insulation and refrigeration plant, run heavier: a 20ft reefer typically tares between 3,000 and 3,400 kg. One-trip new builds out of Vietnam or China hover near the 2,250 kg low end thanks to consistent factory steel; older Cargo Worthy and Wind & Water Tight units drift toward 2,400 kg because of accumulated paint, patch welds, and floor replacement work over a 15 or 20 year life.
The 30,480 kg maximum gross is the ISO 668 ceiling. Whether your local Ontario buyer can use that full payload depends on road rules, not on the container.
How Much Fits Inside a 20ft Container?
A 20ft shipping container holds about 33.2 m³ (1,172 cubic feet) of interior cube across roughly 13.86 m² (149 square feet) of floor, enough for the contents of a two-bedroom apartment or 10 to 11 standard pallets on the floor. That headline cube figure assumes you fill the unit to the ceiling and to the door header. In practice you will lose a few cubic metres to access aisles, to non-stackable cargo, and to the 4-inch gap between the door header and the roof. Honest planning capacity is closer to 28 to 30 m³ for palletised cargo.
Floor area sits near 13.86 m² (149 square feet), which is roughly the footprint of a small bedroom. For storage planners that translates to:
- Standard pallets (1.0 m × 1.2 m, GMA): around 10 to 11 pallets on the floor, 20 to 22 if you can stack two-high without crushing.
- Euro pallets (0.8 m × 1.2 m): around 11 to 12 on the floor, 22 to 24 stacked.
- Bulk household contents: the contents of a two-bedroom apartment fit comfortably with room left for tools and seasonal gear.
- Farm feed and supplies: 10 to 12 tonnes of bagged feed at typical density, with aisle space.
Map the Cube Before You Order
Before you commit to a 20ft versus a 40ft, sketch your actual cargo on a 5.89 m × 2.35 m rectangle. Most Brantford and Hamilton contractors who call us thinking they need a 40ft realise their tool inventory, ladder racks, and bagged material fits inside the 33 m³ cube of a single 20ft with room to walk. The opposite happens too: cottage owners measuring their Sea-Doos and snowmobile gear realise the 6.06 m length cuts it close on a long sled. When the cube math gets tight, weighing the shorter box against the 40ft on cost per cubic metre is the cleanest way to decide, which is exactly why we keep both lengths walkable side by side in the yard.
How Tall Is the Door Opening on a 20ft Container?
The door opening on a 20ft shipping container is 2.34 m wide by 2.28 m tall, which is about 4 inches shorter than the 2.39 m interior ceiling. This is the spec that catches more first-time buyers than any other. The reason for that lost clearance is structural: a steel header beam crosses the top of the door frame to maintain the unit’s rigidity when the doors are open and the container is being craned. That header eats four inches of clearance.
What that means in real life:
- A standard 53-inch (1.35 m) pallet jack fits easily through the door.
- Most pickup-truck-sized ATVs and side-by-sides clear the door with inches to spare.
- A standard residential refrigerator (typically 70 inches / 1.78 m tall) clears.
- Anything taller than 7 feet 6 inches (2.28 m) will NOT fit through the door, even though it would fit once inside the interior 2.39 m height.
- Standard 1.5 m wide commercial doorframes, large workshop tool chests, and tall bookcases need to be evaluated against this 2.28 m × 2.34 m portal.
Buyers planning a container office, container retail conversion, or container workshop should hold this door clearance in mind from day one. If your business requires a 2.5 m tall machine in the unit, you cannot put a standard 20ft on site and lift the machine in afterward. Either it goes in before the doors swing on at the factory, or you cut a side wall opening, which means modifications, which means more cost.
Standard 20ft or 20ft High Cube: Which Do You Need?
A 20ft high cube is identical in length and width to a standard 20ft but adds a foot of height, taking the exterior from 2.59 m to 2.90 m and the interior ceiling to about 2.70 m. Pick the high cube only when you genuinely need that extra vertical room. The 20ft high cube is less common in North America than the 40ft high cube, but it exists. Door clearance on the high cube climbs to about 2.58 m, which is what makes it worth ordering for taller loads.
The trade-offs are worth weighing:
| Spec | Standard 20ft | 20ft High Cube |
|---|---|---|
| External height | 2.59 m (8’6″) | 2.90 m (9’6″) |
| Interior height | 2.39 m (7’10”) | 2.70 m (8’10”) |
| Door clearance height | 2.28 m (7’6″) | 2.58 m (8’5″) |
| Interior cube | 33.2 m³ (1,172 ft³) | 37.4 m³ (1,320 ft³) |
| Tare weight | ~2,300 kg | ~2,400 kg |
| Typical use | General cargo, storage, basic offices | Tall machinery, double-stacked pallets, ceiling-fan installs |
For most Ontario buyers, the standard 20ft is the right pick. The high cube only earns its keep when you genuinely need that extra 30 cm of vertical room, typically for tall industrial machinery, double-stacked Euro pallets in vertical configurations, or a container conversion where ceiling fixtures and HVAC need overhead clearance.
Can You Haul a 20ft Box on Ontario Roads Without Permits?
Yes. A standard 20ft shipping container on a tilt-deck or flatbed trailer stays inside Ontario’s legal width, height, length, and weight limits, so no oversize permits or escort vehicles are needed for a normal delivery. Once you know the static dimensions, the next question is what happens when that box rides on a flatbed or tilt-deck truck through Ontario. The Ministry of Transportation Ontario governs vehicle dimensions and weights under the Highway Traffic Act and Transport Canada’s Cargo Securement Standard 10. A 20ft container loaded on a standard tilt-deck trailer sits well within the legal envelope:
- Width on a trailer: 2.44 m container plus trailer rails stays under the 2.6 m legal limit for non-oversize loads.
- Height on a trailer: the container’s 2.59 m plus a typical 1.1 m to 1.4 m trailer deck height leaves total height around 3.8 m, well under the 4.15 m maximum for most Ontario routes.
- Length on a trailer: a 20ft container on a tilt-deck trailer comes in around 9 m total combination, which fits inside the standard 23-metre legal vehicle length.
- Gross weight on the road: a fully loaded 30,480 kg container plus a tractor unit and trailer puts the rig near 38 to 42 tonnes gross. That sits inside the standard configuration limits for Ontario five-axle semi-trailers (39,500 kg) and six-axle trains (45,500 kg).
The practical takeaway: no oversize permits, no escort vehicles, no specialty trailer for a standard 20ft delivery in Ontario. That keeps freight cost realistic versus 40ft or 53ft loads which may require permits in tighter urban corridors.
Brantford to Anywhere in Ontario
From our 4 Brantford yards, a 20ft container reaches almost every Ontario buyer in 1-3 days. Highway 403 east into Hamilton and the GTA, Highway 401 west to London and Windsor, Highway 24 north to Cambridge and Guelph, and Highway 6 south to Caledonia and the Niagara region all carry 20ft loads without a thought. Northern routes to Sudbury, Sault Ste. Marie, and Thunder Bay run 5 to 10 days because of freight scheduling, not because of any size or weight issue with the container itself.
What Site Prep Does a 20ft Container Need?
A 20ft shipping container needs a firm, level pad of roughly 6.5 m by 3 m, ideally crowned gravel or compacted stone, with the four corner castings lifted clear of standing water on blocks or timbers. Once you know the 6.06 m length, 2.44 m width, and 30,480 kg potential gross, you can plan the ground. Site preparation breaks into three concerns:
Footprint and pad. Set out a 6.5 m by 3 m level area for the container itself plus working clearance. The container sits on its four corner castings, so the ground only needs to be firm under those four points, but for tilt-deck delivery the entire footprint area must be reasonably flat. Gravel, compacted base, or concrete pad all work. Sandy or soft clay sites should be improved with crushed stone before delivery.
Drainage and rust prevention. The 20ft tare of 2,300 kg means the corner castings press hard into wet ground. Standing water under the corner castings is the number one cause of premature rust. Crown the pad or pitch it 2 percent for drainage, and consider concrete blocks or pressure-treated 6×6 timbers under the corners to lift the steel a few inches clear of the ground.
Delivery access. A tilt-deck truck needs about 23 m of straight-line clearance behind the drop point to lower the container. Tight urban driveways, sloped country lanes, and overhead trees lower than 4.5 m can block delivery. Walk the route from the road to the drop point before you order. If access is tight, talk to our team about HIAB crane-truck delivery as an alternative, which lifts the container over obstacles rather than tilting it down.
How Do You Read the CSC Plate for Real Numbers?
The CSC plate on a 20ft shipping container is the small metal rectangle riveted to a door that lists that exact unit’s tare weight, maximum gross, allowable stacking weight, manufacturer, build year, and inspection history. It is the authoritative source for any individual container’s real numbers. CSC stands for Container Safety Convention, the 1972 IMO treaty that mandates structural certification for international shipping containers, and every ocean-grade container carries one of these plates on a door.
What to Look for on the Plate
When you visit our Brantford yard to walk a 20ft before you buy, the CSC plate is the first thing to read. The line “Tare Weight” (sometimes written “T.W.”) gives the actual empty weight of that specific unit, which varies a couple hundred kilograms from one container to the next. The line “Maximum Gross Weight” gives the ISO 668 ceiling for that unit, typically 30,480 kg on a standard 20ft. The build year tells you the container’s age, and the periodic re-inspection date tells you whether it is still certified for international shipping. For storage-only buyers, an expired CSC plate is fine. For anyone reusing the container for export, the plate needs current certification.
The four grade categories every honest yard explains:
- One-Trip / New Build. Manufactured in Asia, shipped once with cargo to North America, essentially factory-new condition. CSC plate fresh, full 30,480 kg gross rating, 25+ year life expectancy.
- Cargo Worthy (CW). Re-inspected used unit, current CSC certification, suitable for further international shipping. Cosmetic rust spots and paint variance from sea exposure.
- Wind & Water Tight (WWT). Used unit guaranteed weather-resistant and rodent-proof but NOT re-certified for shipping. CSC plate may be expired. Right for stationary land storage.
- As-Is. Older units sold cheap for non-storage use. May have floor damage, frame issues, or door problems. We carry As-Is bins but rarely recommend them unless you know exactly what you need it for.
How Many Pallets Fit in a 20ft Container?
A 20ft shipping container holds about 10 to 11 standard GMA pallets in a single floor layer, or 11 to 12 Euro pallets, with the 2.35 m interior width as the limiting dimension. Stack two-high where the cargo allows and those counts roughly double. For commercial buyers, the question is rarely “what does it measure” and more often “how do I lay out my cargo to use every cube”. The 5.89 m × 2.35 m interior floor accepts several configurations:
| Pallet type | Pallet footprint | Floor count (single layer) | With safe stacking (double) |
|---|---|---|---|
| GMA / North American | 1.0 m × 1.2 m | 10 to 11 | 20 to 22 |
| Euro / EUR-1 | 0.8 m × 1.2 m | 11 to 12 | 22 to 24 |
| Industrial / ISO | 1.2 m × 1.2 m | 9 to 10 | 18 to 20 |
| Half pallet | 0.6 m × 0.8 m | 22 to 24 | 44 to 48 |
The 2.35 m interior width is the constraint. Two GMA pallets at 1.0 m each fit comfortably side by side with 35 cm of aisle clearance. Two Euro pallets at 0.8 m each fit with 75 cm of clearance, enough for a pallet jack to manoeuvre. Three Euro pallets across is mathematically possible at 2.4 m of pallet width, but the 5 cm overage means rubbing the walls and is not industry practice.
Floor weight is rated to 8,000 to 9,000 kg per square metre for ocean-grade marine plywood, which means even a fully loaded 30,480 kg container distributing across 13.86 m² of floor stays well inside structural tolerance.
Which 20ft Use Case Fits Your Dimensions?
A 20ft shipping container suits farm storage, a mobile construction-site office, or a backyard workshop, because its 13.86 m² floor and 33 m³ cube cover small-to-mid storage loads while the 6.06 m length still fits most sites. Different buyers come to the 20ft for different reasons, and the dimensions map differently against each use:
Farm Storage
For Norfolk and Haldimand farmers, the 13.86 m² floor and 33 m³ cube of a single 20ft holds typical feed, equipment, and tool inventory for a small to mid-sized operation. The 2,300 kg tare is light enough that a single tilt-deck truck delivery, no crane, places the bin on a graveled corner of the property in under 30 minutes. Wind and watertight grade (WWT, the used grade just below cargo-worthy) hits the sweet spot for stationary farm use.
Construction Site Office
For Brampton and Mississauga contractors running multi-site jobs, the 6.06 m length stays compact on a tight jobsite, while the 2.39 m interior height gives clearance for a desk, two filing cabinets, and a stand-up plan table. The 2.28 m door clearance fits standard office furniture without issue. A factory-fresh box is the right choice here because the bin will be seen by clients and inspectors, which is why most office buyers start with our stock of single-voyage 20ft units rather than a weathered used grade.
Backyard Workshop or Studio
For homeowners and renovators, the 20ft fits in most suburban backyards with room around it. The 2.59 m external height clears most overhead obstructions and keeps the unit low enough that a tilt-deck truck can thread it past fences and tree limbs. The 33 m³ cube is enough for a woodworking shop with bench tools, a music studio, or a creative space without the cost of a full backyard build. If you would rather frame your own version of this from a blank box, our walkthrough of turning a steel box into an office, cabin, or studio shows what the 20ft footprint can become.
Christian LeBlanc, second-generation operator: “Buyers ask me for the 20ft numbers every day. I grew up in this yard, traveling to Asia with my dad starting at age 15, so the specs are second nature. What I tell people is this: the 6.06 m length, 2.44 m width, and 2.59 m height are the easy part. The four numbers that actually decide whether you order the right bin are interior cube, door clearance, tare weight, and maximum gross. Once you know those four, you know whether the 20ft fits your job or whether you need a 40ft or a high cube.”
If the standard 20ft does not fit, the next step is usually a 40ft or a 20ft high cube. The decision often comes down to running the cost-per-cubic-metre math on each length, especially when cargo volume is the limiting factor rather than site footprint.
Bring a Tape Measure to the Yard
The number that surprises buyers most is the 2.28 m door clearance. Specs on paper read 8 feet 6 inches and people picture 8 feet 6 inches of door, which is wrong. When you visit our Brantford yard, bring a tape measure and physically measure the door opening yourself. We have nothing to hide and the math gets clearer when you see it in steel. Walk the unit, climb inside, and confirm the cube fits the cargo you plan to put in it.
This is also the right moment to confirm the grade and build year of the actual unit you plan to buy. When you are ready to put numbers to it, you can tell us the bin you want and request a quote, and we will match a real unit to your site. CSC plates vary slightly from one container to the next, and the difference between a 2,250 kg tare and a 2,400 kg tare matters if your delivery surface is marginal.
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Tell us the size and your postal code and we’ll send back an honest, all-in number, container, delivery, and placement, usually within 1-3 days. No pressure, no mystery fees.
Family-run in Brantford since 1995 · 200+ containers in stock · 4.9★ across 124+ Google reviews · every box graded by a person, walk it before it lands.
Frequently Asked Questions
What are the exact external dimensions of a 20ft shipping container?
External length 6.058 m (often quoted as 6.06 m or 19 feet 10 and a half inches), external width 2.438 m (8 feet flat), external height 2.591 m (8 feet 6 inches) for a standard dry van. These dimensions are set by ISO 668:2020.
How much does an empty 20ft shipping container weigh?
Tare weight runs between 2,200 kg and 2,400 kg (4,850 to 5,290 lb) depending on age, grade, and manufacturer. The most-quoted average is 2,300 kg. The exact tare for any individual container is stamped on its CSC plate.
What is the maximum gross weight of a 20ft container?
Under ISO 668, the maximum gross weight is 30,480 kg (67,200 lb). Some ocean carriers rate units lower at 24,000 kg for additional safety margin. The figure on your specific container is printed on its CSC plate.
How much can I fit inside a 20ft container?
Interior cube is approximately 33.2 m³ (1,172 cubic feet). Floor area is 13.86 m² (149 square feet). That translates to roughly 10 to 11 GMA pallets on the floor or about the contents of a two-bedroom apartment with room left for tools.
How tall is the door opening on a 20ft container?
The door opening is 2.34 m wide by 2.28 m tall. Note that the door height is 4 inches shorter than the interior ceiling height because of the structural header beam above the doors. Tall cargo that fits the interior may not fit through the door.
What is the difference between a standard 20ft and a 20ft high cube?
The high cube adds one foot of height. External height climbs from 2.59 m to 2.90 m. Interior height rises to 2.70 m and door clearance to 2.58 m. Interior cube grows from 33.2 m³ to 37.4 m³. Use the high cube only when you need that vertical clearance for tall machinery or double-stacked pallets.
Can I move a loaded 20ft container on Ontario roads without special permits?
Yes. A standard 20ft container on a tilt-deck or flatbed trailer stays within standard width, height, length, and weight limits for Ontario road vehicles. No oversize permits or escort vehicles are required.
How thick is the floor of a 20ft container?
The floor is 28 mm (just over 1 inch) of marine-grade plywood laid over steel cross members. It is rated for 8,000 to 9,000 kg per square metre of static load, which is well above any normal storage application.
What ground prep do I need for a 20ft container in Ontario?
Set out a 6.5 m by 3 m level area, ideally on gravel or compacted crushed stone. Crown the pad for drainage. Place concrete blocks or pressure-treated timbers under the four corner castings to lift the steel clear of standing water. Tilt-deck delivery needs about 23 m of straight-line clearance behind the drop point.
Where do I find the official tare weight for my specific container?
The CSC plate, a small metal rectangle riveted to the left door, lists the actual tare weight, maximum gross weight, manufacturer, build year, and inspection history for that exact unit. The CSC plate is the authoritative source for any individual container.
Sources
- International Organization for Standardization. (2020). ISO 668:2020, Series 1 freight containers, classification, dimensions and ratings (7th ed.). iso.org/standard/76912.html
- International Maritime Organization. (1972, amended). International Convention for Safe Containers (CSC). imo.org
- Hapag-Lloyd. (2026). 20′ Standard Container, Cargo Fleet Specifications. hapag-lloyd.com
- Transport Canada. (2025). Cargo Securement Standard 10, Containerized Cargo. tc.canada.ca
- Government of Ontario. (2024). Highway Traffic Act, R.S.O. 1990, c. H.8, Vehicle Weights and Dimensions. ontario.ca/laws/statute/90h08
Reach Van Blanc in Brantford
We have been supplying shipping containers across Ontario since 1995. Our warehouse is at 90 Morton Avenue E in Brantford, and we deliver right across the province on a cash-on-delivery basis. No surprise fees, no chase-the-paperwork.
Van Blanc Ent. Inc. 90 Morton Ave E Unit 1B, Brantford, ON N3R 7J7 +1 888-509-6658
Bring a tape measure when you visit. The 20ft numbers in this guide are real, but the bin you order will have its own CSC plate with its own actual tare and gross figures. Walk it, measure it, and confirm before you pay. Worth the drive for unbeatable quality, family customer service with 30 years of experience.