Free Tool
Browse aluminum and steel cylinders by name (AL80, LP104, S80…). Each entry shows water volume, working pressure, material, typical weight, and the buoyancy at full / 50 bar / empty, so you can pick the right tank for the dive without guessing.
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The cylinder reference that powers the Buoyancy Calculator.
The Cylinders database is the reference Dive Kit's Buoyancy Calculator uses internally, but exposed as a browseable list so you can look up specs directly. Each cylinder shows its water volume in litres, working pressure in bar, material (aluminum or steel), typical weight in kilograms, and the precomputed buoyancy at three states: full, 50 bar, and empty.
Most entries also include a Typical Use note ("Standard rental tank globally", "Twinset back gas", "Sidemount stage") and a Common Brands list (Luxfer, Catalina, Faber, Worthington, Thunderbird) so you can match a cylinder you have in front of you to its database entry.
The data comes from manufacturer specs, validated against published reference tables. If you're switching between equipment configurations or planning a trip where you'll be renting unfamiliar cylinders, this is the fastest way to know what you're getting.
A cylinder's buoyancy is the displaced water weight minus the weight of the cylinder plus the weight of the gas inside. As gas is consumed, the cylinder gets lighter, so a full AL80 sits at about −1.8 kg (negative) and an empty AL80 at about +1.8 kg (positive), a 3.6 kg swing. Steel cylinders have a smaller swing because their material is denser. The database stores precomputed values for the three reference states so the Buoyancy Calculator can interpolate without recomputing for each dive.
The same database that powers the Buoyancy Calculator, exposed as a list.
Browse
Open the Cylinders database and you get a list of every common diving cylinder by name, AL100, AL80, AL40, S80, LP104, HP130 and more, each row showing water volume and working pressure at a glance. Grouped by material so you don't have to scroll past steel to find your AL19.
Detail
Tap any cylinder for the detail card. Water volume, working pressure, material, typical weight, and the buoyancy at full, 50 bar, and empty. Each entry includes a Typical Use note ("Standard rental tank globally", "Sidemount stage") and a Common Brands list (Luxfer, Catalina, Faber, Worthington, Thunderbird) so you can match a real cylinder to its database entry.
More free dive planning tools in Dive Kit.
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