# Metric conversions help!

1. We are having to use the metric, apothecary, and household systems and convert between them all . Im stuck on the ones that are fractions.....how do I convert these? Thanks sooooo much

1/8 grains = ? mg

3.2 kg = ? grams

2.42 L = ? cc

.03 grams = ? grains

6 oz = ? lb

its the decimals throwing me off..........and fractions
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3. 1/8 grains = ? mg - 1 grain = 60 mg

3.2 kg = ? grams - 1 kg=1000g

2.42 L = ? cc - 1ml=1cc

.03 grams = ? grains - 1 grain =60 mg

4. Quote from FNPhopeful
We are having to use the metric, apothecary, and household systems and convert between them all . Im stuck on the ones that are fractions.....how do I convert these? Thanks sooooo much

1/8 grains = ? mg

3.2 kg = ? grams

2.42 L = ? cc

.03 grams = ? grains

6 oz = ? lb

its the decimals throwing me off..........and fractions
1/8 grains = ? mg
gri = 60mg
1/8 x 60 = 7.5 mg

3.2 kg = ? grams
3200 move three decimal places to right

2.42 L = ? cc
L = 1000 cc
2.42 x 1000 = 2420 cc

.03 grams = ? grains
1 gram = 15 grains
.03 x 15 = .045 grains

6 oz = ? lb
This one, I have to think about..hehe
5. here's a website that may help you: http://www.convert-me.com/en/ you can input a measurement and it will return the conversion in a whole number of different ways. you can also click on a particular measurement and get conversion tables. here are some links to some other conversion charts:

http://www.delmar.edu/nsci/jartman/1406-conv.htm - a list of most commonly used conversion factors in doing medicine dosage calculations from the chemistry department of del mar college in corpus christi, tx.

http://www.schwarzflex.com - conversion charts that you can print out

http://www.csufresno.edu/nursingstud...onversions.htm - metric and standard conversion charts from fresno state nursing club very nicely presented

to turn a fraction into a decimal you divide the denominator into the numerator. so, 1/8 would be 1 divided by 8 which = a decimal of 0.125. your 1/8 grains now becomes 0.125 grains which is a number that is easier to work with.
6. Quote from daytonite
here's a website that may help you: http://www.convert-me.com/en/ you can input a measurement and it will return the conversion in a whole number of different ways. you can also click on a particular measurement and get conversion tables. here are some links to some other conversion charts:

http://www.delmar.edu/nsci/jartman/1406-conv.htm - a list of most commonly used conversion factors in doing medicine dosage calculations from the chemistry department of del mar college in corpus christi, tx.

http://www.schwarzflex.com - conversion charts that you can print out

http://www.csufresno.edu/nursingstud...onversions.htm - metric and standard conversion charts from fresno state nursing club very nicely presented

to turn a fraction into a decimal you divide the denominator into the numerator. so, 1/8 would be 1 divided by 8 which = a decimal of 0.125. your 1/8 grains now becomes 0.125 grains which is a number that is easier to work with.
great links daytonite! question: on the convert-me website how do you enter in a fraction? (is that a dumb question? im math illiterate lol)
7. I guess I have to change it to a decimal huh
8. Try entering it as 1 slash 8 (1/8) or as the decimal equivalent, 0.125.
9. Quote from Bala Shark
1/8 grains = ? mg
gri = 60mg
1/8 x 60 = 7.5 mg

3.2 kg = ? grams
3200 move three decimal places to right

2.42 L = ? cc
L = 1000 cc
2.42 x 1000 = 2420 cc

.03 grams = ? grains
1 gram = 15 grains
.03 x 15 = .045 grains

6 oz = ? lb
This one, I have to think about..hehe

For the .03 grams to grains the convertme website says the answer is .463 ??

No one knows how you'd get 6 oz to lbs? obviously 6 oz is less than one pound..........do we divide 6 oz by 16 oz?
10. yes--6 oz / 16 0z = 0.375 or 0.38 (depends how your school has you round)

I have found that memorizing the following basics has gotten me through metrics and drug calcs quite nicely:

1 ounce= 30ml
1 ml = 15 gtts
1 G =15 grains
1 grain= 60 mg
1 T= 3 tsp
1 tsp = 5 ml
1 ml= 1 cc
1 pt =500 ml
1 qt =1000 ml
2 pt= 1 qt
4 qt = 1 gal
1 kilo = 2.2 pounds
1 G = 1000 mg

I just write these at the top of every test and am ready for any probs that come my way. GL!
11. Quote from FNPhopeful
For the .03 grams to grains the convertme website says the answer is .463 ??

No one knows how you'd get 6 oz to lbs? obviously 6 oz is less than one pound..........do we divide 6 oz by 16 oz?
.03 grams = ? grains

You can do it this way,

gr i = 60-65 mg, usually it is gr i = 60 mg, but you are approximating..

If you do it this way,

30 mg = grains?

But in short, you can use 1 gram = 15 grains because that is the conversion..If your instructor says it is wrong, you have to let him see the conversion..
Last edit by Bala Shark on Aug 21, '06
12. edit
Last edit by Bala Shark on Aug 21, '06
13. daytonite put a better explanation below...
Last edit by allthingsbright on Aug 22, '06
14. Here is how to do these problems utilizing conversion factors and using dimensional analysis. Please note that depending on the conversion factors you use when going between grams and grain there will be variances in the answers:

1/8 grains = ? mg

you want to end up with the final label of mg in the numerator. Also, convert 1/8 to a decimal of 0.125 which was done for you in a previous post just to make things easier. So, the DA equation will be set up like this:
0.125grains / 1 (given information) X 60mg / 1 grain (conversion factor set up so that the labels, "grain", will cancel out from the numerator of one fraction and the denominator of the other leaving you with only one label, "mg") = 7.5mg

3.2 kg = ? grams

you want to end up with the final label of grams in the numerator.
3.2kg / 1 (given information) X 1000grams / 1kg (conversion factor, again set up so that the labels, "kg" will cancel out leaving you with only the label of "grams") = 3200 grams

2.42 L = ? cc

you want to end up with the final label of cc (cubic centimeters) in the numerator
2.42 L(liters) / 1 (given information) X 1000mL / 1L (conversion factor) X 1cc / 1mL (conversion factor) = 2420 cc

.03 grams = ? grains

you want to end up with the final label of grains in the numerator
0.03grams / 1 (given information) X 15grains / 1gram (conversion factor) = 0.45 grains

6 oz = ? lb

you want to end up with the label of lb.(pounds) in the numerator
6oz (ounces) / 1 (given information) X 1 pound / 12 ounces (conversion factor) = 0.5 pounds