I hate to ask this since it should be fairly easy to look up - yet I’ve had no real luck (and have been a bit confused).
How many CCs are in a gram?
I have some creatine that has a 8.5 CC scoop, but on the container of the creatine it says take one scoop, which is 5 grams… Is this conversion correct? I also had some other stuff that was a powder (DAA), which I’m supposed to take 3 grams of. It would be easy if I could just get a 3 gram scoop, but no such luck.
A gram is a unit of mass, while a cc (cubic centimeter) is a measure of volume. The density of the material would need to be considered.
I have no idea the density of your two substances, since they are probably not 100% pure one substance.
It depends on what you’re measuring.
CC (cubic centimeters) are units of volume.
Grams are units of mass.
One CC of gold dust is a lot heavier (a lot more grams) than one CC of aluminum powder. You’d have to know the density of the creatine to know the conversion factor.
One gram is defined as the weight of 1cc (1mL) of pure water (H[sub]2[/sub]O), so like others have said, the conversion will depend on the density of the material being measured.
To further clarify, your question is similar to asking how one would convert gallons to pounds.
mmm
A teaspoon can be considered to be 5 CCs.
As noted, you need to consider the density of the material, but as a couple of quick reference points. I just weighed a teaspoon of 4 things:
5cc water = 5 gm
5cc salt = 6 gm
5cc sugar = 6 gm
5cc flour = 3.5 gm
(These are approximate weights, this was done on an electronic kitchen/postage scale not a laboratory Mettler. Someone will be along shortly with true scientific data for you 
Your creatine scoop of 8.5cc for 5 gm would indicate that its density is more like flour than sugar.
No. A gram is defined as 0.001 * the mass of the IPK located in Sèvres, France.
This is false; 1 cc of water is only approximately one gram, as a result of the true definition of the gram as being a fraction of the standard kilogram in France. It might happen to be close enough if you aren’t doing precision work.
Hmm, all those years of hard science gone to waste!
Which for anything that actually matters is equal to 1mL of pure water.
Not reallly, unless you are talking about the UK monetary pound. A gallon is four pounds.
Declan
Four pounds of what? Gallon is a unit of volume.
In any case, one old definition of a Commonwealth liquid gallon was the volume of ten (not four) pounds of water at 62F. Now it is defined in terms of liters.
A gallon of milk will weigh between 8.63 (skim) and 8.6 (whole) pounds, by dairy industry standards. A gallon of water weighs in at 8 pounds, which we remember by that ditty “a pint’s a pound the world around.” (1 gallon = 8 pints)
I’m not sure what would weigh in at 4 pounds to the gallon. Oil, perhaps? Something considerably less dense than water. ETA: Ah, google, how I love thee. Pumice and some woods are almost exactly half the density of water. I don’t know that I’ve ever seen them in a gallon measurement, however.
A gallon is a unit of volume at ground level, when a plane is fueled and takes off, those gallons become weight.
Your other point, I use American standard rather than imperial. How many hogshead to the rod dont have much relevance to me.
Declan
Ok, this makes sense. Both the creatine and the DAA came with the same size scooper - which is why I thought it was wrong. The scooper is 5 grams of creatine and 3 grams of DAA. DAA is a lot more “fluffy” then creatine, so what has been written makes sense.
Thanks all.
A gallon is a unit of volume period. The plane’s fuel gauge doesn’t somehow mystically start measuring weight instead of volume the instant the plane’s wheels leave the ground.
OK, then lift a gallon of solid lead with one arm.
Ok, I understand your point, and perhaps “gallon” is used as a weight measurement in aviation as it relates to fuel, I don’t know. But airplane fuel is still not 4 pounds to a gallon.
Declan- why wouldn’t whole milk, which has more lower-density fat, weigh less per gallon than skim milk?
No. No, it isn’t. One US pint of water is 1.04 pounds. One Imperial pint of water is 1.25 pounds. Link. That little ditty is so wrong it’s scary.