Medical Calculators

Medical Calculators list. Each calculator, along with examples and formulas, provides a unique way to review medical math.

Medication Dose Calculators

Desired Over Have

Calculate Medication dose e.g., Oral solid, liquid and single IV IM dose. It doesn’t matter what type of units are used in this formula.(e.g don’t mix milligrams with grams)

PO Dose: Solids

Doses solid forms of medication (e.g., tablets, caplets, capsules, lozenges). Dose → tab, dose/kg → tab(amount of solid form)

PO Dose: Liquids

Doses liquid medications such as Syrup, emulsions, suspensions. Dose → ml, dose/kg → ml(amount of liquid form)

IV Dose → gtt/min

Calculate drug infusion rates without an IV pump. Dose/hour, dose/minute, dose/kg/hour and dose/kg/minute.

IV Dose → ml/hr

Calculate drug infusion rates with an IV pump. Dose/hour, dose/minute, dose/kg/hour and dose/kg/minute.

IV Dose to mL

Calculates single dose IM, IV injections

IV Rate Calculators

Time → gtt/min

No IV pump. Calculate infusion rates when given a volume and length of time.

Time → mL/hr

With IV pump. Calculate infusion rates when given a volume and length of time.

IV Time Calculators

mL/hr → Time

Calculates the duration of an infusion when the rate is known (With an IV pump).

gtts/min → Time

Calculates the duration of an infusion when the rate is known (without an IV pump).

Pediatric Dose Calculators

For under 1yr of age

Converts an adult dosage into a pediatric using Fried’s Rule based on age in months.

For 1yr - 12yr of age

Converts an adult dosage into a pediatric using Young’s Rule based on age in years.

For upto 20yr of age

Converts an adult dosage into a pediatric using Dilling’s Rule based on age in years.

Based on BSA

Converts an adult dosage into a pediatric using BSA. (Catzel Rule)

Based on Body Weight

Converts an adult dosage into a pediatric using Clark’s Rule based on weight.

Clinical Calculators

BSA Calculator

Calculates BSA (body surface area) according to height and weight.

Maintenance Fluid Calculator

Calculates maintenance fluid according to body weight using Holliday segar method.

BMI Calculator

Calculates BMI (body mass index) according to height and weight.

IV Medication Calculator Allows you to Calculate: