DiveGearAdvice.com
Updated March 2026
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Weight Calculator
Find your ideal weight for UK diving conditions
Your Weight
Without dive gear
kg
Body Composition
Affects natural buoyancy
Lean / Slim
Low body fat, less natural buoyancy
Average
Typical build
Muscular
Dense muscle sinks more
Higher Body Fat
More natural buoyancy
Exposure Suit
Biggest factor in weight requirements
3mm Wetsuit
Holiday only
5mm Wetsuit
Jun-Sep
7mm Wetsuit
Apr-Oct
7mm Semi-Dry
Year-round
Neoprene Drysuit
Year-round
Membrane Drysuit
Year-round
Tank Type
Steel tanks help you sink, aluminium floats
10L Steel
Shore diving favourite
12L Steel
UK standard
15L Steel
Extended dives
11L Aluminium
Hire tank / travel
Ali 80 cuft
US standard hire
Twin 12L Steel
Technical diving
Water Type
Salt water = more buoyant = more weight
Salt Water
Sea / ocean diving
Fresh Water
Lakes / quarries
Heavy Accessories
These offset some weight
Camera System
Primary Torch
Calculate My Weight