# Anyone a MATH wizz??? - page 2

Ok I'm studying and I need helpppp!! Can anyone show me how to work this out? I've gone over it and over it.. You have Dobutamine 1GM in 250 mls. What is the concentration of mcq to mls?... Read More

1. 1 gm converts to 1,000,000 mcg divided by 250 ml =4000
Hope it helps.
Last edit by cindyRN 2006 on Nov 9, '05
2. Sorry sorry sorry -
I think my brain cells have died -

1gram = 1,000,000 mcg

4000mcg/ml
Last edit by sandypinktruck on Nov 9, '05
3. 1 gr = 1000 mg
1000 mg =1,000,000 mcg
1,000,000mcg/250ml = 4000mcg/ml

Its the number of zeros that's throwing everyone off
4. the way my pharm instructor told us to do calculations is to look at what you have and then at what you need. convert so that both are the same ( mg and gm to either both mg's or both gm's). then solve your problem.
5. If anyone is interested.......I have a simple way to figure these kind of problems. Some of you may think it is too simplistic, but when I was first starting calculations, I was scared to death of the math-Thanks here goes to Mr. Saversco, my 4th grade math teacher I am now confident at most calculations, but a bit slow. Anyways, this method is hard to explain on this site, but here goes.

When you have to convert from grams to micrograms, write it out like this

grams milligrams micrograms

Each "measurement" equals 3 0's. Since you know how many grams, put that number there. Remember to correctly place the decimal at this time.

grams milligrams micrograms
1. 000 000

Now let's say that you have the posters problem, and have to convert 1 gram to micrograms.

grams milligrams micrograms
1. 000 000

For every measurement that you move towards micrograms, the decimal moves 3 places. Put 0's in each empty decimal place.

grams milligrams micrograms
1 000 000.

1 gram=1,000,000 micrograms. (note where the decimal ends up!)-I use a pencil and actually loop that decimal over to the right.

Now the question is 1,000,000 micrograms / 250 milliliters