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How Much Weight Do I Need?

Tips and Buoyancy Review



Basic Weight Guidelines (Source: PADI) Exposure Suit Type
Swimsuit/Dive skin .5 - 2kg./1 - 4 lbs.
2mm = 1/16 in. shorty 5% of your body weight
2/3mm = 1/16 in. Jumpsuit 7% of your body weight
5mm = 3/16 in. jumpsuit or two piece 10% of your body weight
7mm = 1/4 in. wet suit w/ hood & gloves 10% of your body weight, +1.5 - 3 kg / 3 - 5lbs.
See note just below!  


PLEASE DO NOT FORGET TO ADD WEIGHT THAT WILL COMPENSATE FOR THE BUOYANCY OF YOUR TANK!!! AS YOU COMSUME AIR FROM YOUR TANK IT WILL BECOME INCREASINGLY BUOYANT.

Example: The 80 cubic foot aluminum tanks that are in use at Aquatic Sports and Adventures and most other locations, are -1.8 lbs. negative buoyancy when full, then +4.0 lbs. positive buoyancy empty. This means you will want to add 2.3 kilos or 5lbs extra to be able to stay down comfortably for your safety stop near the end of your dive.

It is important to remember that any time you change gear you recheck your buoyancy. Replacing your old 7mm wetsuit with a new one will give you more buoyancy. A different BCD etc. Recheck your buoyancy!

How to check buoyancy

    • Get in water too deep to stand.
    • Leave your regulator IN YOUR MOUTH
    • Take a normal breath and hold it
    • You should float about eye level
    • Exhale and you should sink


Fresh Water to Salt Water Change

Body Weight Add when going to salt water
40 - 56 kg. = 100 - 125 lbs 2 kg. / 4 lbs.
57 - 70 kg. = 126 - 155 lbs. 2.3 kg. / 5 lbs.
71 - 85 kg. = 156 - 186 lbs. 3 kg. / 6 lbs.
86 - 99 kg. = 187 - 217 lbs. 3.2 kg. / 7 lbs


What is the best way to distribute my weights?

  • Think about the shape of your body. Do you displace more water from your waist up towards your head, or from your waist down towards your feet?
  • If you have broad shoulders and a robust chest, then you will probably will want to shift some of your weights to trim pockets higher up on your BCD. Another good way to do this, is to use an extra tank strap to attach weights to your tank at the desired position (e.g. higher or lower).
  • If you displace more water from the waist down, then you may find a pair of ankle weights to be very useful in weight distribution.<
Aquatic Sports and Adventures
Address: Privada Los Naranjos #30, Santiago, Manzanillo, Colima, Mexico  28860
Phone in the USA direct to the shop in MX: 909-266-0271
Phone Internationally to MX: 011-52-314-334-6394
Phone from MX: 314-334-6394
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