Best Outdoor Deck Boxes: Capacity, Locks, Seating Compared
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Four outdoor deck boxes are compared here, from a 50-gallon resin box to a 160-gallon galvanized steel box. Each listing states a capacity in gallons, a closure and a material. The capacities are 50, 100 (two listings) and 160 gallons. Only some listings mention a lock, a seat rating or wheels, so those points are covered one at a time. Every figure is taken from the listing as the seller states it and was checked on 18 October 2026.
Quick answer: for the most storage, the 160-gallon metal box lists wheels and gas struts, but it weighs 57.3 pounds. For a 100-gallon box with a lock and a seat rating, the Flamaker resin box lists a 600-pound seat load, but its weight is not stated. For a smaller box that still has a padlock hasp, the 50-gallon Fancyango resin box is the one to check.
The four picks at a glance
| Box | Listed capacity | Material | Lock or closure (as listed) | Listed weight |
|---|---|---|---|---|
| Fancyango 50 Gallon Waterproof Deck Box (B0H7MPKWSR) | 50 gallons | Resin | Padlock hasp, lock not included; lift-off lid | Not stated |
| Metal Deck Box Waterproof 160 Gallon (B0GTLZS1MZ) | 160 gallons | Galvanized steel | Flip top with dual gas struts | 57.3 pounds |
| Flamaker 100 Gallon Resin Deck Box (B0GQGLF6W8) | 100 gallons | Resin | Lock and key; latch and handle | Not stated |
| Devoko 100 Gallon Outdoor Storage Box (B0GQ555K8G) | 100 gallons | Polypropylene | Lockable; flip top in one field, lift-off lid in another | 33.1 pounds |
1. Fancyango 50 Gallon Waterproof Deck Box
This is the smallest of the four, listed at 50 gallons with item dimensions of 30.67 by 16.89 by 21.73 inches. It is resin and the listing describes it as waterproof and UV resistant. The bullets say it has a built-in padlock hasp, but the lock is not included. The side handles are built in for moving the box. The lid is listed as lift-off in one field, while the closure field reads lock and key. The item weight is not given in the fields we read, so the listing does not say how heavy the box is when empty.
See the 50 gallon resin deck box on Amazon
2. Metal Deck Box Waterproof 160 Gallon
This is the largest listing, at 160 gallons and 53.15 by 27.76 by 29.92 inches. The bullets describe a 0.6 mm galvanized steel frame with 0.3 mm color-coated steel panels. It has dual gas struts, rolling wheels and integrated side handles. The listed item weight is 57.3 pounds, the heaviest of the four. The bullets list cushions, garden tools, pool accessories and sports gear as the kind of contents it is meant to hold. The fields we read do not list a lock, so check the product page if you need one.
View the 160 gallon metal deck box on Amazon
3. Flamaker 100 Gallon Resin Deck Box
The Flamaker box is listed at 100 gallons with item dimensions of 48.2 by 21.5 by 24.6 inches. It is resin, waterproof and UV resistant, and the closure is lock and key. The bullets say a metal reinforcement bar runs along the top cover so the lid does not bend in sun or rain. The listing also says the box can serve as a seat with a maximum load of 600 pounds, and that adding a thickened cushion makes it more comfortable. The listing says it requires assembly. Its item weight is not stated in the fields we read.
Open the 100 gallon Flamaker deck box on Amazon
4. Devoko 100 Gallon Outdoor Storage Box
The Devoko box is also listed at 100 gallons, with the same 48.2 by 21.5 by 24.6 inch dimensions as the Flamaker. It is polypropylene and listed at 33.1 pounds, which is 24 pounds lighter than the 57.3-pound metal box. The bullets describe gas hydraulic pistons that lift the lid gently, and recessed handles on both sides. The bullets say two people can carry it when it is filled with tools. The listing is marked lockable, but the closure field reads flip top while the opening field reads lift-off lid, so check how the lid opens before you buy.
See the 100 gallon Devoko box on Amazon
How we chose these four
We kept listings whose titles name a deck box or outdoor storage box with a stated capacity in gallons. All four passed on 18 October 2026. We did not fill, test or open any box, and nothing below reports how a box held up outdoors. The points that were compared across the four listings were:
- Capacity: 50, 100 and 160 gallons as stated in the title and capacity field.
- Locks: a padlock hasp on the 50-gallon box, lock and key on the 100-gallon Flamaker, and a lockable note on the Devoko.
- Seating: only the Flamaker lists a seat load, at 600 pounds.
Worked example: does the listed capacity match the outer size?
Multiply the listed outer dimensions to see how the gallon figures compare. The 50-gallon Fancyango box measures 30.67 by 16.89 by 21.73 inches, which is about 11,256 cubic inches, or about 48.7 gallons using 231 cubic inches per gallon. That is close to its listed 50 gallons. The 100-gallon Flamaker box measures 48.2 by 21.5 by 24.6 inches, which is about 25,493 cubic inches, or about 110.4 gallons. The 160-gallon metal box measures 53.15 by 27.76 by 29.92 inches, which is about 44,145 cubic inches, or about 191.1 gallons.
The outer volume of the metal box is about 31 gallons more than its listed capacity. Wall thickness and lid depth take up room inside a box, so some gap is expected. The listings do not give interior dimensions, so the gap cannot be settled from the listing alone. Measure the inside of the box you plan to buy before you buy a cushion or a set of tools.
What the listings do not say
None of the four listings gives a test result for weather or UV resistance. The waterproof and UV claims are the sellers’ own wording. The seating figure of 600 pounds appears only in the Flamaker listing, and the other three do not give a seat rating. The Devoko and Flamaker boxes share the same listed dimensions, so the dimensions alone do not tell them apart. The Devoko closure fields conflict with each other. The 50-gallon listing gives no item weight. Read the listing before you buy, especially the lid type and the lock details.
Frequently asked questions
Which deck box holds the most?
The metal 160-gallon box holds the most by listed capacity. Its outer dimensions also work out to the largest volume of the four, at about 191 gallons. Expect it to be the heaviest to move, at 57.3 pounds as listed.
Can a deck box be used as a seat?
Only the Flamaker listing gives a seat rating, a maximum load of 600 pounds. The listing says a thickened cushion makes the box more comfortable to sit on. The other three listings do not state a seat load.
Do these boxes come with a lock?
None of the listings includes a padlock. The Fancyango listing has a hasp for a padlock that the buyer must supply. The Flamaker is listed as lock and key. The Devoko is listed as lockable, but the listing does not say whether a lock is included.
Which box is easiest to move?
The 160-gallon metal box has wheels and side handles, and the Devoko and Flamaker boxes have built-in handles. The Devoko lists 33.1 pounds, which is lighter than the metal box at 57.3 pounds, but it has no wheels listed. The Fancyango box lists side handles and gives no weight.
Is a resin deck box waterproof?
The resin listings describe the boxes as waterproof and UV resistant. None of the listings shows an independent test. The metal box is described as rust resistant, and its listing gives no separate waterproof test.
Conclusion
For the most room, the 160-gallon metal box with wheels is the listing to check, and expect it to be the heaviest. For a seat that can hold 600 pounds, the Flamaker 100-gallon resin box is the only listing that gives a seat rating. For a lighter 100-gallon box, the Devoko lists 33.1 pounds, so confirm the lid type before you buy.
For more on outdoor storage and patio gear, see DIY planter boxes for a deck railing, standing propane patio heaters, and 20 lb propane tanks for a patio heater.
50 gallon resin deck box on Amazon · 160 gallon metal deck box on Amazon · 100 gallon Flamaker deck box on Amazon · 100 gallon Devoko deck box on Amazon
