Calculation Formulas and Conversions Flashcards
1 teaspoon
5 ml
1 tablespoon
15 mL
1 fl oz
30 mL
1 cup
8 oz, 240 mL
1 pint
16 oz, 480 mL
1 quart
2 pints, 960 mL
1 gallon
4 quarts, 3840 mL
1 kg
2.2 pounds
1 oz
28.4 grams
1 lbs
454 g, 16 oz
1 grain
65 mg
mEq to mmol
1:1 for monovalent ions
1:0.5 for divalent ions
1 inch
2.54 centimeters
1 meter
100 centimeters
% w/v
X g / 100 mL
% v/v
X mL/ 100 mL
% w/w
X g / 100 g
Percentage strength equation
% strength = 100 / ratio strength
Ratio Strength equation
ratio strength = 100 / percentage strength
PPM –> percentage strength
move decimal left 4 places
Percentage strength–> PPM
move decimal right 4 places
specific gravity equation
SG= weight of substance (g)/ weight of equal volume of water (g)
OR
SG= g/ mL
Dilution & concentration (changing strength or quantity)
Q1 x C1 = Q2 x C2
Q1=old quantity
C1= old concentration
Q2= new quantity
C2 = new concentration
osmolarity
mOsmol/L = (wt of substance (g/L) / WV (g/mole) ) x (# of particles) x 1000