20 Foot Container Specs: Measurements, Weight, and Capacity

A 20 foot shipping container is a standardized steel intermodal freight unit, 20 ft long × 8 ft wide × 8 ft 6 in tall externally. The interior volume is approximately 1,172 cubic feet (33.2 m³). The tare weight is about 5,071 lbs (2,300 kg), and the maximum payload is approximately 62,130 lbs (28,180 kg). These dimensions are standardized to ISO 668 — the international rulebook that allows the same container to be transferred between ships, trucks, and trains without being remeasured.
Every common variant, outside, inside, door opening, weight, and volume is detailed in this guide. That way, you can plan storage, freight, or a conversion project with confidence.

Key Measurement

• External footprint: 20 ft × 8 ft × 8 ft 6 in (6.06 m × 2.44 m × 2.59 m)
• Internal usable space: ~19 ft 4 in × 7 ft 8 in × 7 ft 10 in
• Tare (empty) weight: 2,300–2,360 kg / 5,071–5,204 lbs for standard; ~2,420 kg / 5,335 lbs for high-cube
• Max payload: up to 28,180 kg / 62,130 lbs
• Max gross weight: ~30,480 kg / 67,200 lbs (ISO 668 ceiling)
• Volume: 33.2 m³ / 1,172 ft³ standard · 37.28 m³ / 1,316 ft³ high-cube
• Pallet capacity: 10 standard U.S. pallets or 11 Euro pallets
• Construction: Corten weathering steel, corrugated walls, marine-grade plywood or steel floor

I’m Steve Hyndman, Vice President at Aztec Container. Over the past 30 years, I have helped leverage the 20 feet container measurement to optimize space for countless individuals and businesses, ensuring the right fit for their needs. Let’s dive deeper into why understanding these measurements is crucial.

Simple 20 feet container measurement word guide:

• 20 foot conex box dimensions
• cubic feet of a 20 foot conex box
• 20 foot conex box weight

Why 20 Feet Container Measurement Matters

Over the past 30 years, Aztec Containers has helped thousands of buyers and renters apply 20-foot container measurements to real-world problems — from a homeowner storing a 3-bedroom move to logistics teams shipping dense industrial cargo across the Pacific.

The reason these numbers matter: a 20-foot container is the global unit of trade. It’s the “TEU” (Twenty-foot Equivalent Unit) that ports use to measure capacity. Knowing the precise dimensions and weight limits is what keeps your cargo legal on the road, safe in transit, and properly fitted to your site.

Whether you call it a conex container, a conex box, a sea can, or simply a 20-footer, the underlying ISO measurements are the same — and they’re the foundation of everything that follows.

20 Foot Shipping Container External Dimensions

Outside dimensions are the concern of crane operators, truckers and site planners. Always allow for extra clearance around the container for safe door swing and access.

External Measurement	Imperial	Metric
Length	20 ft 0 in	6.06 m
Width	8 ft 0 in	2.44 m
Height (Standard)	8 ft 6 in	2.59 m
Height (High-Cube)	9 ft 6 in	2.90 m
Footprint (floor area)	160 sq ft	14.9 m²

These dimensions are standardized under ISO 668, so the container can fit on any compliant truck chassis, rail flatcar, construction site equipment, or container ship globally.

20 Foot Shipping Container Internal Dimensions

Interior space is smaller than the exterior because of corrugated steel walls, the floor sub-structure, and the door frame. Always plan loading using these numbers.

Internal Measurement	Imperial	Metric
Internal Length	19 ft 4 in	5.89 m
Internal Width	7 ft 8 in	2.33 m
Internal Height (Standard)	7 ft 10 in	2.39 m
Internal Height (High-Cube)	8 ft 10 in	2.69 m
Internal floor area	~150 sq ft	~13.9 m²

20 Foot Shipping Container Door Opening Dimensions

The door opening is slightly smaller than the interior because of the corner-post structure and the door header. Measure every large item (pallets, machinery, vehicles) against the door opening, not the interior — items have to pass through the doorway first.

Door Opening	Imperial	Metric
Door Width	7 ft 8 in	2.34 m
Door Height (Standard)	7 ft 6 in	2.28 m
Door Height (High-Cube)	8 ft 5 in	2.57 m

20 Foot Shipping Container Weight Specifications

When people Google 20 foot shipping container weight or 20 foot conex container weight, they are usually asking one of three things: Weight of empty box? What’s the load capacity? How much gross weight does a truck have to carry? The breakdown is as follows:

Weight Metric	Standard 20-Foot	High-Cube 20-Foot
Tare weight (empty)	2,300–2,360 kg / 5,071–5,204 lbs	~2,420 kg / 5,335 lbs
Max payload (cargo)	up to 28,180 kg / 62,130 lbs	up to 28,060 kg / 61,861 lbs
Max gross weight	~30,480 kg / 67,200 lbs	~30,480 kg / 67,200 lbs

Definitions: 

• Tare weight = the weight of the empty container itself. This is the same whether it’s a conex container, a shipping container, or a sea can — the name varies, but a 20-foot ISO box weighs roughly 5,000+ lbs empty.
• Max payload = the maximum legal cargo weight you can load inside.
• Max gross weight (MGW) = tare + payload combined. This is the ceiling enforced by ISO 668 and by every ocean carrier.

Types of 20-Foot Containers

All 20 foot shipping and storage containers are not created equal. Basic ISO footprint is the same, but height, doors and roof structure are different. Here’s how the five major types stack up against each other:

Container Type	External Height	Volume	Best For
Standard (Dry Van)	8 ft 6 in	33.2 m³ / 1,172 ft³	Dry goods, furniture, general storage
High-Cube	9 ft 6 in	37.28 m³ / 1,316 ft³	Tall items, vertical stacking, machinery
Open Top	8 ft 6 in	~32.6 m³	Oversized cargo loaded by crane
Flat Rack	8 ft 6 in (collapsible walls)	N/A (platform)	Heavy machinery, vehicles, pipes
Reefer (Refrigerated)	8 ft 6 in	~28 m³ (reduced by insulation)	Perishables, pharma, food cold chain

At Aztec Container, the Standard and High-Cube dry containers are by far the most common choices for storage, jobsite use, and conversions. Reefer units for storage are popular with food businesses and construction sites that need to store ice for concrete pours.

What Is a Conex Container?

Conex container is a term that originated with the U.S. Army’s “Container Express” boxes used from the Korean War onward. Today, it’s used interchangeably with “shipping container,” “sea can,” or “ISO container.” A modern 20-foot conex container has the same ISO 668 dimensions and weight specs as any other 20-foot shipping container — what makes a conex box a conex box is its construction (Corten steel, corrugated walls, twist-lock corner castings), not a different size standard.
So if you’re comparing a 20-foot Conex container weight to a 20-foot shipping container weight, you’re comparing the same thing — the empty tare is about 5,000–5,200 lbs in both cases.

What Can Fit in a 20-Foot Container?

Use Case	What Typically Fits
Home moving	Contents of a 1–2 bedroom apartment, including furniture and appliances
Vehicle storage	One full-size sedan or SUV with room to spare for boxes
Office conversion	Compact mobile office for 2–3 staff with desks and storage
Construction site	Tools, equipment, materials, plus a secure breakroom corner
Retail/pop-up	Full pop-up shop, food kiosk, or ticket booth (with modifications)
Bulk commercial	~50 refrigerators, ~400 televisions, or thousands of small consumer goods

Common Uses by Industry

• Construction site: secure on-site storage for tools, materials, and equipment that have to stay outdoors in harsh weather.
• Retail & hospitality: custom-built pop-up shops, coffee bars, and concession stands.
• Agriculture & farming: chemical storage, hay storage, equipment lockup.
• Residential: garage overflow, seasonal storage, ADU, and tiny-home shell.
• Logistics & shipping: the original use — moving freight by sea, rail, and truck.
• Emergency response: field hospitals, command posts, and supply caches.

Buying or Renting a 20-Foot Container

If you’re looking for a 20-foot shipping container for sale near me, the practical questions are usually:

Decision Factor	What to Know
New vs. Used	Used (one-trip or wind-and-watertight) costs less; new offers maximum lifespan
Buy vs. Rent	Buy for permanent use; rent for short-term jobsite or seasonal needs
Standard vs. High-Cube	High-Cube adds 1 ft of interior height for ~10% more usable volume
Modifications	Roll-up doors, vents, windows, electrical, HVAC, partitions, lock boxes
Pricing factors	Condition, type, location, delivery distance, and modifications

Aztec Container has been in this business since 1969. We offer nationwide sales of 10-ft, 20-ft, and 40-ft containers and shipping rentals across California. If you’d like a quote, call 1-800-399-2126 or visit our 20-Foot Containers page.

Frequently Asked Questions about 20 Feet Container Measurement

What is the standard 20-foot container measurement?

A 20-foot shipping container measures 20 ft × 8 ft × 8 ft 6 in externally, with internal usable dimensions of about 19 ft 4 in × 7 ft 8 in × 7 ft 10 in. These dimensions are set by ISO 668 and apply globally.

What does a 20-foot shipping container weigh?

An empty (tare) 20-foot container weighs approximately 2,300–2,360 kg (5,071–5,204 lbs) for a standard unit and ~2,420 kg (5,335 lbs) for a high-cube. Fully loaded gross weight maxes out at ~30,480 kg (67,200 lbs).

Is the 20-foot Conex container weight different from a regular shipping container?

No. Conex container is just an alternative name for a steel ISO shipping container, originally a U.S. military term. A 20-foot Conex container’s tare and gross weights are identical to a standard 20-foot ISO container.

How many pallets fit in a 20-foot container?

A 20-foot container fits 10 standard U.S. pallets (40″ × 48″) or 11 Euro pallets (1.2 m × 0.8 m) in a single layer. With stable, stackable cargo, you can roughly double those numbers.

Can I find a 20-foot shipping container for sale near me?

Aztec Container sells 20-foot shipping containers nationwide across the U.S. and rents them throughout California. Call 1-800-399-2126 or fill out our quick quote form.

What’s the difference between a standard and high-cube 20-foot container?

A high-cube is 1 foot taller externally (9 ft 6 in vs 8 ft 6 in), giving you about 1 additional foot of interior height and roughly 12% more internal volume. The maximum payload is similar between the two.

Conclusion

In conclusion, understanding the 20 feet container measurement is essential for anyone looking to optimize storage and transportation efficiency. These containers offer a practical solution for a variety of needs, from moving household items to shipping vehicles and pallets. With their standardized dimensions and robust weight capacity, they provide a reliable means to handle diverse cargo.

At Aztec Container, we specialize in providing high-quality 20-foot containers custom to meet your specific requirements. Whether you need a standard container for storage or a customized unit for a unique project, we have the expertise and resources to deliver solutions that align with your goals. Our offerings include competitive pricing, fast delivery, and a range of customization options to ensure you get the most value from your investment.

For more information on our 20-foot containers, visit our 20-Foot Containers page. Here, you’ll find detailed specifications, customization options, and the ability to request a quote. If you have any questions or need assistance, contact our team. We’re here to help you find the perfect container solution for your needs.