Conversions and Equations

Converting Celsius to Fahrenheit

9C = 5F - 160

1 tsp

5 ml

1 tbsp

15 ml

1 fl oz

30 ml

1 cup

240 ml

1 pint

480 ml

1 quart

960 ml

1 gallon

3840 ml

Fried’s rule

(infant age in months/150) x average adult dose = dose for infant

Young’s rule

(age of child in years x average adult dose)/(age of child in years + 12)

Clark’s rule

(weight of child in pounds x average adult dose)/150 lbs

1 kilogram

2.2 lbs

Dilution equation

(old volume)(old %) = (new volume)(new %)

Alligation

lower % - desired % = x

higher % - desired % = y

x/(x+y) = amount of higher strength solution needed

y/(x+y) = amount of weaker strength solution needed

infusion rate/flowrate

volume (mL)/time (hr)

Drip rate

(total volume (mL)/time (min)) x drop factor (gtt/mL)

Percent markup

(markup x actual dollar amount)/cost

Selling price

cost + (cost x percent markup)

Percent gross profit

(markup x actual dollar amount)/selling price

Cost

selling price/(1 + price markup)

Net profit

selling price - (product cost - overhead)