HOSA Medical Math Conversion Flashcards

Metric Conversions

• 1 meter equals 100 centimeters.
• 100 centimeters equals 1000 millimeters.
• 10 millimeters equals 1 centimeter.
• 1 gram equals 1000 milligrams.
• 1 milligram equals 1000 micrograms.
• 1 kilogram equals 1000 grams.
• 1 kilogram is approximately 2.2 pounds.
• 1 pound equals 16 ounces.

Volume Conversions

• 1000 cubic millimeters equals 1 cubic centimeter.
• 1000 cubic centimeters equals 1 cubic decimeter.
• 1000 cubic decimeters equals 1 cubic meter.
• 1 liter equals 1000 milliliters.
• 10 centiliters equals 1 deciliter.
• 10 deciliters equals 1 liter.
• 1 liter is equivalent to 1 quart, 32 ounces, or 2 pints.
• 500 milliliters equals 1 pint, 16 ounces, or 2 cups.
• 240 milliliters equals 1 cup or 8 ounces.
• 30 milliliters equals 1 ounce.
• 15 milliliters equals 1 tablespoon or 3 teaspoons.
• 5 milliliters equals 1 teaspoon.
• 1 milliliter equals 15 drops.
• 0.0667 milliliters equals 1 drop.

Length Conversions

• 1 meter equals approximately 39.372 inches or 3.281 feet.
• 0.914 meters equals 3 feet or 1 yard.
• 0.3048 meters equals 12 inches or 1 foot.
• 2.54 centimeters equals 1 inch.

Dosage Calculations

• Young's Rule for pediatric dosing:
  • Child's Dose = (child's age in years / (child's age in years + 12)) x adult dose.
• Fried's Rule for infant dosing:
  • Infant's Dose = (age in months / 150 pounds) x adult dose.
• Clark's Rule for child's dose:
  • Child's Dose = (weight of child in pounds / 150 pounds) x adult dose
  • OR
  • Child's Dose = (weight of child in kilograms / 68 kilograms) x adult dose.

Solution Strength Calculations

• Ratio for strength of solutions:
  • Ratio = amount of drug / amount of solution.
• Percent strength by volume:
  • Percent = (volume of solute / volume of solution) x 100.
• Percent strength by weight (mass):
  • Percent = (mass of solute / volume of solution) x 100.
• Equality of proportions:
  • Amount of solute / Amount of first solution equals Amount of solute / Amount of second solution.