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Old 09-22-2007, 06:45 AM   #1
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Converting Grams To Millilitres?

On my3rd day at college yesterday we were making fresh braed and puff pastry.. my lecturer told us to weight out 126 grams of water...

This led me to confusion as id never heard of liquid being weighed in grams before, so i had to physically weight the water, using VERY old fashioned scales, and then transfer it to the mixing bowl.

Now what i want to know is - is there a conversion between grams and millilitres? If there is it would make life much easier as i could do the maths & then just measure it out in a jug - much much easier!

Any help would be great! Thanks, will.

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Old 09-22-2007, 07:15 AM   #2
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Hi Will, I found this bit of info. Hope it helps.

Grams and milliliters
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Old 09-22-2007, 09:13 AM   #3
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1000 grams (a kilogram) of water is a liter (1000 milliliters) of water. Guess the prof may have been disappointed that you didn't know that.
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Old 09-22-2007, 09:47 AM   #4
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you have to respect that it`s like comparing apples and oranges too.

Grams is a unit of weight (Mass).
ml`s or Cm^3 is a unit of Volume.

it so happens that as stated above Water is taken as the benchmark, and 1000ml (1000Cm^3) has the mass of 1Kg (1000g) at standard Room Temp (298K) and pressure (101Kpa).

things like "Fluid Onces" don`t really exist in SI units.

Factoid: still using Water as the Benchmark, that`s where we get out Temperatures from also, a linear scale between the Melting point of water 0c and the Boiling point 100c.
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Old 09-22-2007, 10:51 AM   #5
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The link that amber posted pretty much explains the difficulty of this conversion.

It will be different for every liquid you are measuring. Water weighs less than mercury or wet concrete.
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Old 09-22-2007, 11:03 AM   #6
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Only for water and other things that weigh the same as water, a gram equals a milliliter.
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Old 09-22-2007, 11:04 AM   #7
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Quote:
Originally Posted by jennyema View Post
...It will be different for every liquid you are measuring. Water weighs less than mercury or wet concrete.

It's gratifying to see that I'm not the only one who celebrates the joys of cooking with wet concrete.
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Old 09-22-2007, 11:11 AM   #8
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or indeed Mercury! for that shiny slippery texture :)
and it never fails to Rise when the temp increases!

edited to add: the above is a joke/play on words, do NOT ever use mercury in foofstuffs, it`s really quite unhealthy!
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Old 09-22-2007, 11:16 AM   #9
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Please don't assume that one ml of anything at all weighs one gram. That conversion, as has been pointed out, is only good for water.

If you want to convert from volume to grams you need to know the density, and to go the other way around, grams to volume the specific gravity (just the inverse of the density).

You can find charts that tell you how much a given volume of flour or sugar weighs, but you have to be careful. Caster sugar does not have the same density as regular good old granulated sugar. Those conversions are meant only as general guides and should not be taken as anything close to exact.
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Old 09-22-2007, 11:18 AM   #10
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Quote:
Originally Posted by Andy M. View Post
It's gratifying to see that I'm not the only one who celebrates the joys of cooking with wet concrete.

You've never had my mashed potatoes!
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