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TOPIC: Drink half your weight in water? Tell me my maths is wrong!

 
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August 3, 2011 4:31 AM
Here's a thing. I'm SURE that drinking TONS of water has helped me lose weight. Convinced. And last night I saw a thing suggesting we should drink half our body weight in water each day. But that seems like an enormous amount - a dangerous amount even? Help me with my maths here folks, please? I'm just under 190lbs, so half would be 85lbs. A litre of water weighs a kilo. There's about 38 kilos in 85lbs.....so I should drink 38 litres a day?! I MUST be miscalculating something here - HELP ME FIND MY MISTAKE, PLEASE!? I've been drinking around 10-12 litres a day, which I thought was pretty darned good going, but there's no way I could do 38? That's like, 19 x 2 litre bottles :-o

I am NOT planning upping my intake, just curious - SURELY I've made a mistake, and no one would suggest I drank 38 litres a day?!?!?!
  7177272
August 3, 2011 4:35 AM
Haha you have to drink half your weight in OUNCES. So get your pounds, divide by two and that's the number of ounces you have to drink.

But that calculation sucks for me! Too much water...
August 3, 2011 4:35 AM
In ounces....
August 3, 2011 4:36 AM
I believe they meant it in ounces. You would drink 85 ounces.
  4197226
August 3, 2011 4:43 AM
it does seem a little excessive that figure :-) . The NHS recommends that we drink about 1.2 litres (around six to eight glasses) a day to keep our bodies hydrated. This figure is therefore to be increased based on your exercise regime. I believe it is somewhere along the lines of 1ml of fluid per kcal burnt.
  7837305
August 3, 2011 4:46 AM
Unfortunately I don't have it to hand but our gym have a formula to calculate how much water you should drink depending on your weight. For me at 248lbs it was 3.8 ltrs - which even they admitted was far too much and to try and drink 2 to 2.5ltrs and more if exercising.
  1439523
August 3, 2011 4:47 AM
You can do search on websites where they have calculators to work out how much you should drink
  1439523
August 3, 2011 5:01 AM
aaahhhhh, so how many US ounces in a UK litre?
I did have a look online before posting, but didn't see any calculators.
SOoooooOOOo glad it WAS my poop maths!
  7177272
August 3, 2011 5:02 AM
QUOTE:

aaahhhhh, so how many US ounces in a UK litre?
I did have a look online before posting, but didn't see any calculators.
SOoooooOOOo glad it WAS my poop maths!


One ounce is 28 ml.
  5649590
August 3, 2011 5:03 AM
.....hahahahaha - 2.2 litres. THAT'S a bit more like it!
And I drink WAY more than that, so I'm sorted!

Thanks guys x
  7177272
August 3, 2011 5:08 AM
Ach, I wish I could 'like' or 'thank' you guys :o)
  7177272
March 5, 2012 8:13 PM
*sigh* why can't we all just use metric...
  8297724
March 5, 2012 8:14 PM
Half your body weight in ounces, not pounds or kilos.

If you weigh 200 pounds, aim for 100 oz (12.5 cups).

It's a good goal to shoot for, although it's not an exact science.
March 5, 2012 8:19 PM
My exercise instructor told me to drink a gallon of water a day. That is 128oz. I do not always drink all but I am very close! This came from a certified personal trainer so it should be right. But I have also heard the drink half your weight in oz too!
  16177538
March 5, 2012 8:43 PM
QUOTE:

*sigh* why can't we all just use metric...


*sigh* why can't we look at the date of a thread before posting?
June 9, 2013 7:16 AM
The formula for that is not half your weight in water. What you do is if you weigh 208 lbs you would divide that by 2, you get 104. Then that is what you drink. So you would drink 104 OUNCES of water. Very effective and very easy formula to follow.
June 9, 2013 7:18 AM
The funny thing is, I KNOW I don't drink enough water. However, I eat a TON of veggies and high water content foods. My urine is always very light, which is a very good indicator. I eat almost a whole head of iceberg lettuce a day.
June 9, 2013 7:18 AM
Don't go by any "rules". Drink enough water so that you are not thirsty and your urine is light to clear.

Your body doesn't just get it's hydration from water so drink what you can but don't obsess .

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