Weight with a steel HP100 tank: what to know
A steel HP100 is negative when empty, so it takes about 2.5 kg less lead than an aluminum 80 in this model. It holds more air, so dives can be longer, but the extra weight changes how you carry and trim.
Worked example
For an 80 kg diver with an average build, wearing a 5 mm wetsuit and using a steel HP100 tank in saltwater, the calculator estimates 4 kg (9 lb). Your number will differ with your body and gear, so enter your own values above and then do a buoyancy check.
Common questions
How much less lead with an HP100?
About 2.5 kg less than an aluminum 80 in this model.
How much does an HP100 weigh?
Roughly 15.5 kg empty and about 18.9 kg full. Use the tank weight calculator for details.
Is an HP100 negatively buoyant when empty?
Yes, slightly, which is why steel divers need less lead.
Does an HP100 change my trim?
It can. Check how you lie in the water and move weights if needed.
Can I use my aluminum 80 weights with an HP100?
Not as they are. Remove about 2 to 3 kg and re-check.
Related calculators
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