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Veterinary
Weight And Measure Conversions 

How Can You Possibly Keep All These Numbers Straight? 

I
don't always remember them either. So I have them on a chart nailed on
the wall. This is it! 

sid ......................................................  once a day  
bid .....................................................  twice a day  
tid ......................................................  three times a day  
qid .....................................................  four times a day  
q ........................................................  every (as in q 48hours {hrs} = every two days)  
sig .....................................................  the dose: as in "sig" q 8hr (the dose is every 8 hours)  
prn ....................................................  as required  
# ........................................................  the number of tablets or capsules in the bottle. #30 = Thirty tablets  
one pound (lb) ...................................  454 grams (gm)  
one pound (lb) ...................................  0.454 kilograms (Kg)  
one ounce (Oz) ..................................  28.35 grams (gm)  
one fluid ounce (fld Oz) .....................  28.35 grams (gm)  
one grain (gr) ....................................  64.8 milligrams (mg)  
one grain (gr) ....................................  0.0648 grams (gm)  
one dram (drm) .................................  60 grains (gr) = 3.88 grams (gm)  
one gallon (gal) ................................  3.785 liters (L) = 3785 milliliters (ml)  
one quart (qt) ....................................  0.946 liters (L) = 946 milliliters (ml)  
one pint (pt) ...................................... 
0.473 liters (L) = 473 milliliters (ml)  
one milliliter (ml) ..............................  One cubic centimeter (cc) = one gram of water  
one liter (L) .......................................  1000 milliliters (ml)  
one quart (qt) ....................................  2 pints (pt)  
one quart (qt) ....................................  1.1 liters (L)  
one inch ( " ) .....................................  2.54 centimeters (cm)  
one FDA human wt ...........................  65 kilograms (kg)  
one FDA child wt ..............................  30 kilograms (kg)  
one gallon (gal) ................................  3785 milliliters (ml) = 3.785 liters (L)  
one ton (ton) .....................................  2,000 pounds (lb) = 908 kilograms (Kg) = 0.907 metric tons  
one part per million (ppm) ................  1 milligrams (mg)/liter (L)  
one microgram (mcg) .......................  0.000001 grams (gm)  
one microgram (mcg) .......................  0.001 milligrams (mg)  
one quart (qt) ....................................  approximately one liter (L) = approximately 1000 milliliters (ml)  
one pint (pt) ......................................  16 ounces  
one fluid pint (fld Pt) .........................  16 fluid ounces (fld Oz)  
one pound (lb) of water ....................  approximately 500 milliliters (ml) "A pint's a pound, the world around"  
one tablespoon (TBS) .......................  approximately 15 milliliters (ml) = approximately onehalf (0.5) fluid ounce (fld Oz)  
one teaspoon (tsp) ............................  approximately
5 milliliter (ml) 

one fluid dram (fld Dm) .....................  approximately 5 milliliters (ml)  
one milliliter (ml) ..............................  approximately 15 drops (dps) (some say 20 drops)  
one milliliter (ml) ..............................  16 minims (the marks on one side of a tuberculin syringe – the other scale is in milliliters  
one kilogram (Kg) .............................  2.2 pounds (lb)  
a 1% solution .....................................  10,000 micrograms (mcg)/ml  
one microgram (mcg) ........................  0.001mg  
a 1% solution .....................................  contains 10,000 micrograms (mcg)/milliliter (ml)  
a 10% solution ...................................  10 grams (gm)/100 milliliters(ml)  
a 2.5% solution ..................................  2.5grams/100 milliliters (ml) 
ug/dL or µg/dl or mcg/dl = microgram per deciliter

This is a common way that blood values are reported by laboratoies in the United States. A microgram is one millionth of a gram and a deciliter is onetenth of a liter or 100 milliliters (mls) 