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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 |