Buoyancy Calculator
Diver & Dive
Water
Salt
Fresh
Height
cm
Weight
kg
Max depth
m
Personal Buoyancy
Optional — improves accuracy
Method
Skip (assume neutral)
Float test — weight held
Float test — volume displaced
Enter value directly
Test water
Salt
Fresh
Weight held
kg
Water displaced
mL
Personal buoyancy
kg
Exposure Suit
Type
Wetsuit
Drysuit
No suit / skin
Style
Full suit
Shorty
Farmer John (2-piece)
Thickness
1 mm
2 mm
3 mm
5 mm
6 mm
7 mm
9 mm
Condition
Standard
New / Soft neoprene
Old (1yr+ heavy use)
Vest
mm
Shell
Trilaminate / Membrane
Neoprene
Compressed neoprene
Crushed neoprene
Shell thickness
1 mm
2 mm
3 mm
4 mm
5 mm
6 mm
7 mm
Undersuit
None (0 mm)
Thin (2 mm)
Medium (3 mm)
Thick (5 mm)
Heavy (7 mm)
Extreme (9 mm)
Accessories
Gloves
mm
Boots
mm
Hood
mm
Measured suit buoyancy (optional override)
kg
Tanks
+ Add tank
Rig
Non-tank gear buoyancy
BCD / wing
kg
Regulators
kg
Other
kg
Results
—
Recommended weight
—
—
BCD lift needed
Suit buoyancy (surface)
—
Personal buoyancy
—
Tank buoyancy (empty)
—
Gas carried (weight)
—
Rig hardware
—
Rig buoyancy (loaded)
—
Buoyancy at Depth
Net buoyancy with recommended weight at key depths
Depth
Full tank
Planned end