fresh to salt weight conversion

[arcFlash]

Hydro and I have been working some math.... ;D Geeks I guess.

So the basics of human buoyancy for me at least.

You need your average density so go get a bodyfat% from and your weight in Kg.
Mine is 68kg and 9%fat. Calculate an average density.
9% of 68kg is 6.12kg times that by the density of fat (.9g/ml). Do the remaining Kg (61.88) times the density of muscle (1.06) and divide the sum by weight.
68kg/(6.12kg*.9 + 61.88kg*1.06) = 1.04g/ml so I'm denser then water and sink.

My volume is then 68,000g/1.04g/ml = 65.384L = 17.2 gallons = 143.6lb of water and I weigh 150 so I do not displace enough water and would need 6.4lb lift to float. Average lung volume is 6L or 12Pint or 12pound so I float when I hold my breath.

Take my average breath at 3L is about 6pounds lift, I'm neutral. I'm really just compensating for the suit at 8lb lead.

If you do this it should give you an idea of what you need to do to offset your natural buoyancy but then 15 minutes at the lake side and you'd know as well.

I don't know if this helps anyone but it's fun knowing. And I may have made a math/logic error as well but I think it's correct.