.25 gr = .25 x 1000 = 250 mg
60 mg is 0.925942 gr(grain), or 0.06 g(grams).
1000
1 gr(grain) is equal to about 1/64th of a mg so 1 mg(milligram) is equal to 0.0154323584 gr(grains)
60 mg -------- gr i 45 mg 15 mg -------- -------- gr 3/4 gr 1/4 30 mg -------- gr 1/2
.25 gr = .25 x 1000 = 250 mg
1500 mg
60 mg is 0.925942 gr(grain), or 0.06 g(grams).
10 gr = 647.99 mg10 gr = 647.99 mg10 gr = 647.99 mg10 gr = 647.99 mg10 gr = 647.99 mg10 gr = 647.99 mg
15 gr = 971.985 mg15 gr = 971.985 mg15 gr = 971.985 mg15 gr = 971.985 mg15 gr = 971.985 mg15 gr = 971.985 mg
1 gr = 1,000 mg 2 gr = 2,000 mg . . 5 gr = 5,000 mg
1000
1 gr(grain) is equal to about 1/64th of a mg so 1 mg(milligram) is equal to 0.0154323584 gr(grains)
60 mg -------- gr i 45 mg 15 mg -------- -------- gr 3/4 gr 1/4 30 mg -------- gr 1/2
0.03g
To get from grains to milligrams you'll need a conversion factor like 1 gr = 64.8 mg. 5 gr x 64.8 mg = 324 mg, so you decide that's close enough and give 1 tab. 1 gr Rounding to 60 mg/1 gr, as is often done, gives 300 mg as your answer, which might cause you to doubt if you will be giving the ordered dose. 3. You just opened a 500 mL bottle of guaifenesin and will be giving 1 tablespoon per dose. How many doses are in the bottle? In other words how many tablespoons are in 500 mL? 500 mL x 1 tsp x 1 tbs = 33 tbs 4.93 mL 3 tsp Rounding to 5 mL gives you the same answer, so rounding to 5 mL is reasonable.
The normal symbol for gram is g, rather than gr. 1 g = 1000 mg so 15g = 15,000 mg. Simple!