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MATH FORMULAS
All Math Formulas
Question | Answer |
---|---|
Calculation of Doses | D/H x Q = Amount to be given |
Powder Volume | Powder volume = final volume - Diluent volume |
Concentration and Dilution | Initial volume(IV)xInitial Strength(IS)=Final Volume(FV)xFinal Strength(FS)HINTS: Initial strength must be larger than final strength; Initial volume must be less than final volume; Final volume minus initial volume equals amount of diluent to be added |
Alligation | Draw Tic tac toe; place highest concentration in upper left corner and lowest in bottem and the desired concentration in the middle; subtract upper left from middle and lower left from middle; total number of parts; parts of total x middle box |
Specific Gravity | Weight of substance/Weight of an equal volume of water |
Time of infusion | Volume of fluid(or amount of drug)/Rate of infusion |
Rate of infusion | Volume of fluid/Time of infusion |
Infusion Rate | Drops/min=(# of ml/hr)x(# of drops/ml)/60mins/hr |
Young's Rule | Age of Child(yrs)/Age of child(yrs)x12 x Adult dose |
Clark's Rule | Weight of child(lb)/150x Adult Dose |
Fried's Rule | Age in Months/150 X Adult Dose |
BSA | Square root of weight x square root of height/60m^2 |
Fahrenheit to Celsius | C=F-32/1.8 |
Celsius to Fahrenheit | F=(CX1.8)+32 |
Cost | Purchase price + cost to dispense |
Discount | Purchase price X Discount Rate |
Discounted Price | Purchase price - Discount |
Gros profit | Selling price - Purchase price |
Inventory turnover rate | Annual dollar purchase/average inventory value |
Markup | Selling price - Purchase price |
Net Profit | Overall cost X desired percent profit |
Overhead | Sum of all expenses |
Profit | Selling price - overall cost |