How accurate do you guys find DiveBuddy.com for their weight calculator?

[johndiver999]

28 lbs with a one layer 5mm and steel tank is not so different than 38 lbs with as 2 layer 7 mm and an aluminum tank.

 

[Doug Cutler]

I thought what the calculator suggested was like double what I use all of the time. Then I realized that it was in kilograms. Once I converted from pounds, it was very accurate.

 

[boulderjohn]

I thought what the calculator suggested was like double what I use all of the time. Then I realized that it was in kilograms. Once I converted from pounds, it was very accurate.

I'm confused--I must be misunderstanding what you are writing. Let's say it said 20 and you thought it was double what you normally use. When you convert 20 kg to pounds, it is 44, which would make it 4 times what you normally use.

 

[CT-Rich]

I'm confused--I must be misunderstanding what you are writing. Let's say it said 20 and you thought it was double what you normally use. When you convert 20 kg to pounds, it is 44, which would make it 4 times what you normally use.

I think he meant it gave him 10 kilos and he thought it was wrong until he had it calculated in pounds (22lbs).

I've used it and found it fairly accurate. I will usually get you within spitting distance of correct. YMMV much better to start from it's suggestion than from scratch.

 

[boulderjohn]

I think he meant it gave him 10 kilos and he thought it was wrong until he had it calculated in pounds (22lbs).

Except he said the first number (10) was double what he normally used, and the second number (22) was accurate.

 

[CT-Rich]

Except he said the first number (10) was double what he normally used, and the second number (22) was accurate.

I just assumed he misspoke. Not a huge deal. Once he realized he was using the wrong weight measure the site gave him the correct weight and unit.

 

[tursiops]

I just assumed he misspoke. Not a huge deal. Once he realized he was using the wrong weight measure the site gave him the correct weight and unit.

I'd like to think you're right, but that's not what he said. His post made no sense. I'd like to hear HIS explantion of what he meant!

 

[boulderjohn]

I wrote last year that Dive Buddy put me at about twice the weight I need. I just ran it again, using the configuration I used when teaching students in the pool. I used 8 pounds because I wanted to be a little overweighted so I could sink quickly or control an overly buoyant student. I probably only needed 2-3 pounds. This was with a 3mm suit and a common jacket BCD. Dive Buddy said I needed 13 pounds. If I changed the calculator to indicate a novice diver, it said I needed 17 pounds. I never put anything close to that much weight on a student. In fact, I had trouble with some students because they did not need any weight at all with a 3mm suit in fresh water, so I had to overweight them so they could do the weight system skills. Students that overweighted would struggle with the buoyancy skills.

 

[Doug Cutler]

"In Salt water, weighing 165 kg, with a 7mm one-piece wet suit with gloves/hood/boots and Aluminum 80:
You will need an estimated 18 kg of weight (+/- 2 kg)."
This would be almost 40 lbs, which is double what I use.
However, I don't weigh 165 kg.
I weigh 165 lbs, which is about 75 kg.
"In Salt water, weighing 75 kg, with a 7mm one-piece wet suit with gloves/hood/boots and Aluminum 80:
You will need an estimated 9 kg of weight (+/- 1 kg)."
9 kg equals about 20 lbs, which is exactly what I have been using for something like the last 15 or so years.
I hope that is helpful.

 

[mattfish]

Haha I just tried this too. The web page says enter your weight in pounds, and if I do that with my typical config, it says I need 16 pounds, which is way more than I use. If I convert my weight to kilograms and enter that instead, the calculator says I need 10 pounds, which is exactly what I dive with.