Calculation Formulas and Conversions Flashcards

1
Q

1 teaspoon

A

5 ml

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2
Q

1 tablespoon

A

15 mL

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3
Q

1 fl oz

A

30 mL

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4
Q

1 cup

A

8 oz, 240 mL

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5
Q

1 pint

A

16 oz, 480 mL

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6
Q

1 quart

A

2 pints, 960 mL

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7
Q

1 gallon

A

4 quarts, 3840 mL

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8
Q

1 kg

A

2.2 pounds

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9
Q

1 oz

A

28.4 grams

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10
Q

1 lbs

A

454 g, 16 oz

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11
Q

1 grain

A

65 mg

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12
Q

mEq to mmol

A

1:1 for monovalent ions
1:0.5 for divalent ions

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13
Q

1 inch

A

2.54 centimeters

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14
Q

1 meter

A

100 centimeters

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15
Q

% w/v

A

X g / 100 mL

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16
Q

% v/v

A

X mL/ 100 mL

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17
Q

% w/w

A

X g / 100 g

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18
Q

Percentage strength equation

A

% strength = 100 / ratio strength

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19
Q

Ratio Strength equation

A

ratio strength = 100 / percentage strength

20
Q

PPM –> percentage strength

A

move decimal left 4 places

21
Q

Percentage strength–> PPM

A

move decimal right 4 places

22
Q

specific gravity equation

A

SG= weight of substance (g)/ weight of equal volume of water (g)
OR
SG= g/ mL

23
Q

Dilution & concentration (changing strength or quantity)

A

Q1 x C1 = Q2 x C2
Q1=old quantity
C1= old concentration
Q2= new quantity
C2 = new concentration

24
Q

osmolarity

A

mOsmol/L = (wt of substance (g/L) / WV (g/mole) ) x (# of particles) x 1000

25
isotonicity (e value)
E= (58.5)(i)/ (MW of drug)(1.8)
26
mols
mols= g/MW
27
mmols
mmols= mg/MW
28
miliequivalents
mEq = (mg x valence)/ MW OR mEq= mmols x valence
29
enteral nutrition calories (carbs, protein, fat)
carbs, protein= 4 kcal/gram fat = 9 kcal/ gram
30
Dextrose monohydrate calories
3.4 kcal/g
31
amino acid solutions calories
4 kcal/g
32
ILE 10% calories
1.1 kcal/mL
33
ILE 20% calories
2 kcal/mL
34
ILE 30 % calories
3 kcal/mL
35
determining fluid needs equation
when weight > 20 kg: 1500 mL + (20 mL)(weight in kg-20) *Can estimate using 30-40 mL/kg/day
36
Total energy expenditure
TEE = BEE x activity factor x stress factor
37
grams of nitrogen from protein
nitrogen (g) = protein intake (g) / 6.25
38
corrected calcium for albumin < 3.5 (not needed with ionized Ca)
Ca corrected(mg/dL) = calcium (reported, serum) + [(4.0-albumin)x(0.8)]
39
Body mass index
BMI (kg/m2) = weight (kg)/ [height(m)]^2 OR weight (lbs)/[height (inches)]^2 x 703
40
ideal body weight (males)
IBW= 50 kg + (2.3 kg)(number of inches over 5 feet)
41
ideal body weight (females)
IBW= 45.5 kg + (2.3kg)(number of inches over 5 feet)
42
adjusted body weight
AdjBW 0.4= IBW + 0.4(TBW-IBW)
43
flow rates/ drop factor
(# drops/mL) x (mL/hr) x (hr/60 min) = (# drops/ min)
44
dehydration ratio
BUN:SCr > 20:1
45