+30 Ammo Can Dimensions Common Military Storage Box Measurements
A standard .50 cal steel ammo can measures roughly 11 x 5.5 x 7 inches, while the larger .30 cal box runs closer to 10.6 x 4.9 x 7.2 inches. If you’ve ever tried to guess which ammo can fits your gear, this ammo can size chart clears up the confusion fast.
Ammo cans are one of those everyday storage items that look similar from a distance but vary a surprising amount once you check the tape measure. Whether you’re buying military surplus for camping, tool storage, or long-term ammunition storage, knowing exact dimensions saves you a wasted trip to the store.
This guide breaks down six real ammo can sizes, from the compact .30 cal box to the massive 20mm can, with exterior and interior dimensions most retailers skip. We’ll also cover something most competitor articles leave out: how ammo can capacity changes once you factor in the rubber gasket and latch closure hardware, which quietly eats into usable interior space.
Read More About: 26 Inches in Feet 6 Surprising Things That Are This Size
How Big Is a Standard Ammo Can?
Most people searching an ammo can size chart expect one universal size, but the military ammunition container family actually includes several standardized shapes. Each size ties back to a specific ammunition type, though civilians now use them for everything from camping gear to hardware organizer duties.
The steel versions share a similar design: a hinged lid, a carry handle, a latch closure, and a rubber gasket that creates an airtight ammo can seal. Plastic ammo can dimensions follow a similar general layout but trade steel construction for lighter, stackable storage bins.
Below, we’ll compare six specific ammo can sizes so you can match the right box to your storage needs.
Quick Conversion Table Ammo Can Dimensions
| Unit | .30 Cal Can (L x W x H) | .50 Cal Can (L x W x H) |
| Inches | 10.6 x 4.9 x 7.2 | 11.0 x 5.5 x 7.0 |
| Centimeters | 26.9 x 12.4 x 18.3 | 27.9 x 14.0 x 17.8 |
| Millimeters | 269 x 124 x 183 | 279 x 140 x 178 |
| Feet | 0.88 x 0.41 x 0.6 | 0.92 x 0.46 x 0.58 |
| Liters (approx. volume) | ~7.2 L | ~9.8 L |
These numbers reflect exterior ammo can dimensions. Interior dimensions of an ammo can typically run 0.5–1 inch smaller per side once you account for steel thickness and the gasket lip.
Quick Reference Table: Ammo Can Sizes vs. Everyday Objects
| Object | Approx. Measurement | Closeness Score (X/10) | Best Situation/Use |
| Shoebox | 13 x 7 x 4.5 in | 6/10 | Similar footprint, less depth |
| Toaster | 11 x 8 x 7 in | 8/10 | Close match to .50 cal can |
| Small toolbox | 16 x 6 x 6 in | 5/10 | Longer, similar height |
| Briefcase | 17 x 12 x 4 in | 4/10 | Wider, much shallower |
| Loaf of bread | 10 x 5 x 4.5 in | 7/10 | Close to .30 cal footprint |
| Large cereal box | 12 x 8 x 3 in | 3/10 | Similar width, far shallower |
Detailed Ammo Can Dimensions by Type
M19A1 .30 Cal Ammo Can
The M19A1 .30 cal ammo can measures about 10.6 inches long, 4.9 inches wide, and 7.2 inches tall, according to standard U.S. military surplus specifications still referenced by sellers like Cabela’s and SGS Engineering. It’s built from stamped steel with a welded seam, a single carry handle, and a rubber gasket rated for airtight ammo can performance in wet environments.
This size works well for pistol ammunition, small hardware organizer needs, or lightweight camping storage. Because it’s compact, it’s often the first ammo can size chart entry people underestimate many assume all ammo cans are the larger .50 cal shape until they see this one side by side.
Read More About: Dishwasher Dimensions in Inches 6 Surprising Sizes
M2A1 .50 Cal Ammo Can
The M2A1 .50 cal ammo can is the most recognized size, sitting at roughly 11.0 inches long, 5.5 inches wide, and 7.0 inches tall, per specifications published by military surplus retailers and echoed in Department of Defense logistics manuals. Interior capacity runs close to 8 liters, making it a popular choice for rifle ammunition, tools, or emergency preparedness kits.
Standard military ammo can size charts list this as the baseline reference size most other cans get compared against. Something no competitor explained: the .50 cal can’s steel gauge is slightly thicker than the .30 cal version, adding noticeable weight even though the exterior footprint isn’t dramatically bigger.
M2A1 “Fat Fifty” Ammo Can
The Fat 50 ammo can, officially another M2A1 variant, widens out to about 12.4 inches long, 7.0 inches wide, and 7.4 inches tall, giving it noticeably more ammo can capacity than the standard .50 cal box. It was originally designed for linked machine gun ammunition belts, which require extra width inside the box.
For civilians, this extra interior room makes it a favorite for tool storage, survival gear, or bulkier hardware. Key distinction: while it looks similar to a standard .50 cal can from the front, the added width becomes obvious once you set them side by side.
PA108 20mm Ammo Can
The 20mm ammo can dimensions come in noticeably larger, typically around 17.5 inches long, 6.5 inches wide, and 8.5 inches tall, based on PA108 military container specs referenced by surplus dealers and reenactment suppliers. This size was built for 20mm cannon rounds used in aircraft and naval applications.
Because of its length, this large ammo can dimension profile suits long tools, rifles, fishing gear, or extended camping equipment. It’s one of the least commonly stocked sizes at retail, so shoppers searching an ammo can size chart often overlook it entirely.
PA120 Bandolier / Large Ammo Can
The PA120 large ammo can measures close to 13.0 inches long, 6.0 inches wide, and 8.0 inches tall, offering a middle ground between the standard .50 cal can and the oversized 20mm container. Interior dimensions of an ammo can this size comfortably swallow bulky items like bandolier-packed ammunition, camping cookware, or bundled tools.
This size shows up often in outdoor gear storage circles because it balances portability with genuinely useful ammo can capacity. It’s heavier than plastic alternatives, but the steel construction and weatherproof container design hold up far better outdoors long term.
MTM Plastic Ammo Can (Small)
Plastic ammo can dimensions differ from steel versions, and the popular MTM small plastic ammo can measures approximately 11.0 inches long, 7.0 inches wide, and 6.5 inches tall, per manufacturer listings from MTM Case-Gard. It uses an O-ring seal rather than a rubber gasket, but still delivers a genuinely airtight ammo can result for dry storage needs.
This small ammo can dimension profile appeals to shooters who want a lighter, corrosion-resistant finish option without steel’s added weight. It’s not as rugged as heavy-duty military-grade steel, but it handles moderate outdoor gear storage and camping storage duties well.
Where Does Ammo Can Capacity Matter Most in Daily Life?
Beyond ammunition storage, these dimensions matter for anyone using ammo cans as a hardware organizer, tool storage box, or emergency preparedness container. Preppers favor the .50 cal and Fat 50 sizes for dry storage of documents, batteries, and food-safe items because the rubber gasket keeps moisture out for years.
Campers and overlanders lean toward the PA120 and 20mm sizes since the added length fits camp stoves, folding tools, and cookware. Meanwhile, the compact .30 cal and MTM plastic options work well as a portable ammunition storage solution for range days, since they’re easier to carry one-handed.
Read More About: Soup Can Dimensions Complete Measurement Guide for Home Kitchens
FAQs About Ammo Can Size Chart Dimensions
What are the dimensions of a .50 cal ammo can?
A standard .50 cal ammo can measures about 11.0 x 5.5 x 7.0 inches. This size holds roughly 8 liters of interior volume and is the most widely recognized entry on any ammo can size chart, according to standard military surplus specifications.
What size is a standard ammo can?
There isn’t one single “standard” size military ammo can size charts include the .30 cal, .50 cal, Fat 50, 20mm, and PA120 variants. Each was designed around a specific ammunition type, so dimensions vary based on which can you’re referencing.
How big is an ammo can compared to a toolbox?
Most steel ammo cans are shorter but deeper than a typical small toolbox. A .50 cal can, for example, is close in overall footprint to a toaster, while a small toolbox runs longer and shallower by comparison.
Are plastic ammo can dimensions the same as steel ones?
Plastic ammo cans are usually slightly wider but similar in length to their steel counterparts. MTM plastic ammo can dimensions trade steel construction and gasket sealing for a lighter, corrosion-resistant finish that’s easier to carry.
What is the interior capacity of a large ammo can?
Large ammo cans like the PA120 or 20mm hold significantly more interior capacity than standard .50 cal boxes often 15–20% more usable space making them better suited for bulky tools or bandolier-packed ammunition.
Final Thoughts
From the compact M19A1 .30 cal can to the oversized PA108 20mm ammo can, this ammo can size chart shows just how much variation exists across “standard” military ammunition containers. Steel versions offer heavy-duty durability and a true airtight ammo can seal, while plastic ammo can dimensions favor lighter, stackable storage for everyday use.
Whether you need ammunition storage, a hardware organizer, or a weatherproof container for camping storage, matching the right size to your gear starts with knowing the exact ammo can dimensions not just guessing based on appearance.
