Calculators

[vladimir]

Weight calculator is about 25% over in swimsuit, 50% over in 3mm. I didn't look at the other options.

The SAC rate is only in metric and should have an imperial version using cubic feet and PSI.

In fact all calculators should included imperial options (feet).

The OP (and his shop, presumably) are in Finland, where imperial units are a trivia question. The prices are in Euros. Perhaps Americans should finally acquaint themselves with the world standard.

The weight calculator recommended 11 kgs for me. I use no lead, but figure my backplate weighs ~3, so it is still off by quite a bit. I don't think any weight calculator will be useful—individual differences in physiology and equipment are too large to make a useful recommendation that way.

 

[nimoh]

The OP (and his shop, presumably) are in Finland, where imperial units are a trivia question. I would go so far as to say that all Americans should acquaint themselves with the world standard.

The weight calculator recommended 11 kgs for me. I use 0, but figure my backplate weighs ~3, so it is still off by quite a bit. I don't think any weight calculator will be useful—individual differences are too large to make a useful recommendation that way.

I don't see anything useful coming out of turning this thread into a metric vs imperial/america vs the world debate.

I believe the thread was started as an application review, and if imperial conversion is going to be provided on some calculators, it should be provided on all, and when it comes to diving, it is not just a matter of converting the units, some things are done differently, tank volume expression being one of them.

Another option (as you suggested) is to make it a metric only calculator...that is fine too.

 

[vladimir]

I don't see anything useful coming out of turning this thread into a metric vs imperial/america vs the world debate.

I believe the thread was started as an application review, and if imperial conversion is going to be provided on some calculators, it should be provided on all, and when it comes to diving, it is not just a matter of converting the units, some things are done differently, tank volume expression being one of them.

Another option (as you suggested) is to make it a metric only calculator...that is fine too.

Maybe some Americans will take the initiative to learn to multiply by 2.2, 3.25, etc., as the case may be. That would be useful.

 

[TSandM]

I put in my information for a dry suit, and the calculator gave me the weight I actually use.

But for a 5 mil suit in fresh water with an aluminum tank, the calculator gave me no weight at all . . . and that makes no sense. An aluminum tank will be positive when empty, even in fresh water, and a 5 mil suit will be positive. I use 9 pounds with that configuration and I am really minimally weighted.

 

[nimoh]

Maybe some Americans will take the initiative to learn to multiply by 2.2, 3.25, etc., as the case may be. That would be useful.

I can do that, and don't need a calculator, but the OP is trying to make an app to do this, and some of us are trying to help

 

[chrpai]

I can do that, and don't need a calculator, but the OP is trying to make an app to do this, and some of us are trying to help

Exactly. An example is the MOD calc gives you meters (or feet) but then the best mix only inputs meters. It really isn't that difficult to have side by side inputs and some javascript that automatically recalculates one when you input the other. It's good usability.

 

[vladimir]

I can do that, and don't need a calculator, but the OP is trying to make an app to do this, and some of us are trying to help

Yes, I added my input regarding the weight calculator to help.

Do you think bickering with me is extremely helpful, or just slightly helpful?

 

[chrpai]

Yes, I added my input regarding the weight calculator to help.

Do you think bickering with me is extremely helpful, or just slightly helpful?

Do you think insulting the math of all americans is helpful? You can't complain when you troll and someone bites.

 

[vladimir]

I am not complaining.

 

[mselenaous]

Adding Imperial is just a suggestion and probably easy to add the option. There are 2-3 million US divers with 500,000+ new divers certified yearly.
The web is international. Adding imperial options to their website will only increase their web traffic (aka profits) which I assume is the final goal of any business sinking time/effort into any endeavor.
If the calculations get 1- corrected and more realistic, and 2- add imperial options, then I would point my students toward this "every calculation you need for scuba" resource because most folks think doing math takes the fun out of scuba, or are intimated by calculations. When I start taking about these numbers, their eyes glaze over. So now I frequently point them to their own smart phone for apps on SAC and MOD, etc.