Metric & Household Measurements

BCC Pharmacy Tech

Metric Measurements Metric system=system of choice for dealing

with weights and measures in the calculations of drug dosages

Decimal system 0.5 0.75 0.007

Certain prefixes identify multiples of 10 that are being used.

4 most common; micro, milli, centi, kilo Prefixes can be used with any of the base

units weight (gram), volume (liter) or length (meter)

Weight 1,000,000 mcg=1 g 1,000 mcg = 1 mg 1000 mg =1 g 1000 g = 1 kg

Volume 1000 mL = 1 L 1 cc = 1mL

Length 1 m = 1,000 mm or 100 cm 1 cm = 10 mm or 0.01 m 1 mm = 0.1 cm or 0.001 m

Example 300 mg equals how many grams?

100 mg: 1 g:: _____ mg: _____ g

1000 mg: 1 g :: 300 mg: __x__ g

More Practice 2.5 L equals how many milliliters? 180 mcg equals how many grams? 15 mm equals how many centimeters?

Household Measurements Household measures are not accurate enough

for the nurse to use in the calculation of drug dosages in the hospital.

Metric equivalents are used. I & O or intake and output

Metric Household Equivalents Metric Measure = Household Measure

5 mL = 1 tsp 15 mL = 1 Tbsp 30 mL = 1 oz 240 mL = 1 standard measuring cup 1 kg or 1000 g = 2.2 lb 2.5 cm = 1 in 1 foot = 12 inches

Example 1 ½ cups equals how many milliliters? 1 cup : 240 mL :: 1 cup : 240 mL :: _____ cups : _____mL 1 cup : 240 mL :: 1 ½ cups : __x__ mL

More Practice 35 kg equals how many pounds? 18 inches equals how many centimeters?

To do Memorize the tables of metric and household

measurements. Study material on forming proportions for the

calculations problems relating to these measurements.

Complete the worksheet Check your answers Evaluate your learning