HOSA medical math formulas

Basic dosage calculation formula

(desired dose ÷ amount on hand) × volume = dose [units/mL]

IV drop rate formula

(volume[mL] ÷ time[min]) × drop factor [gtts/ml] = flow rate [gtts/min]

IV mL rate formula

(volume[mL] ÷ time[hr]) = flow rate [mL/hr]

Dosage calculation by weight

weight (kg) × dosage (kg) = required dosage

Amount in IV fluid

(concentration % ÷ 100) × volume [mL] = dosage amount [g]

Body Surface Area (BSA) calculation metric

√(height [cm] × weight [kg]) ÷ 3600

Body Surface Area (BSA) calculation english

√(height [in] × weight [lb]) ÷ 3131

Normal Saline (NS)

0.9% NaCl

Fº —> Cº

°C=(F-32) 5/9

Cº —> Fº

°F=(C x 9/5) + 32

1 kilogram =?? grams

1000

1 gram = milligrams?

1000

1 milligram = ? micrograms

1000

1 kilogram = ?? pounds

2.2

1 pound = ?? ounces

16

1 cubic meter =?? cubic decimeters

1000

1 cubic decimeter = ?? cubic centimeters

1000

1 cubic centimeter = ?? cubic millimeters

1000

1 liter = milliliters

1000

1 deciliter = ? centiliters

10

1 liter =?? deciliters

10

1 cubic centimeter = ?? milliliter

1

around 240 milliliters

1 cup / 8 ounces / 16 tbsp

30 milliliters

1 ounce / 2 tbsp / 6 tsp

15 milliliters

1 tablespoon / 3 teaspoons

5 milliliters

1 teaspoon

1 milliliter =??? gtts

15 drops

0.0667 milliliters

1 drop

1 meter

39.4 inches

2.54 centimeters

1 in

Juice glass

6 oz

Coffee cup

8 oz

Water glass

7 oz

Jello cup

5 oz

Ice cream

4 oz

Creamer

1 oz