Calculators

[Reizka]

Hi!

First of all I hope I posted this in the correct place. I'm pretty new to ScubaBoard

I've recently finished doing this simple weigh estimating calculator for a company's site where I work at and I'd like to get some opinions on it. Does it give even remotely accurate weight suggestion etc.

Diving Calculators

There also bunch of other calculators there you're more than welcome to try out and tell me if they suck in some way. More work for me then

Any feedback would be more than welcome!

Cheers!

 

[clownfishsydney]

On your best mix calculator, the depth in feet is wrong (by a long way) if large figures in metres are input. For example, 50 m is said to be 82 feet. 45 metres is said to be 89 feet but 42 metres is 95 feet. None of these is correct.

Actually, just did some more tests, it is not right for any depth and at lower metre figures the feet figure is large (18 metres = 172 feet).

 

[Peter69_56]

Tried it with me and it seems way off. I am 89 kg, 7 mm wetsuit, hood, salt, aluminium cylinder and it gives 16 kg (35 lb), I use 11 kg (22 lb)

 

[MaxBottomtime]

I tried the weight calculator. It recommends 36 pounds. I manage just fine with 18.

 

[Peter69_56]

I tried your weight calculator and it made my arse look big (I must be a bit of a girl!)

 

[gekodivebali]

Says 7kg for me. I use 2

 

[rongoodman]

I tried the weight calculator and it came out with 28# for me with a 5mm in salt water with an Al80, when in fact I use about 18#. It's not just off by a couple of pounds, but by more than 50%.

 

[chrpai]

Surface Air Consumption (SAC) Rate Calculator doesn't have an option for imperial and it also doesn't input service pressure. Do you assume that all tanks have the same service pressure?

The weight calculator (and maybe others) reset of the selections after each submission. Makes it hard to play with the numbers and quickly get results.

The calculator also doesn't take into consideration if it's a BC, AL or STEEL backplate. For my weight (235), swim trunks, AL tank and fresh water it says 7lbs. I suppose that's close since it doesn't know I'm wearing an AL backplate and wing and zero pounds. But the 7mil one piece, steel and fresh water is way off. It says I'd need 28lbs and I don't wear anything. A steel BP and steel tank ( about 12lbs total ) is all I need.

 

[Tigerman]

Surface Air Consumption (SAC) Rate Calculator doesn't have an option for imperial and it also doesn't input service pressure. Do you assume that all tanks have the same service pressure?
...

You dont NEED the service pressure, the only relevant factors for SAC rate calculations by water capacity is the tank volume, time, depth and how much gas has disappeared from the tank..
i.e. 20 meters, 30 minutes, 12l tank, using 100 bar -> you've used 1200 liters of air in 30 minutes = 40 liters/minute at (20/10)+1 =3 atm -> 40 l/m divided by your 3 atm = 13,33 liter/min sac (0.47 cuft)

 

[chrpai]

In the imperial world you do.