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Length, Area, Volume, Mass

Chapter:
Units of Measure
Author(s):

Phil B. Fontanarosa

and Stacy Christiansen

Length, Area, Volume, Mass

Measurements of length, area, volume, and mass are reported by means of metric units rather than English units (Table 1). In less formal, nonscientific texts such as essays, use of nonmetric units, such as miles or inches, and the use of idioms, such as “An ounce of prevention is worth a pound of cure,” are acceptable. In addition, if the nonmetric unit was used as part of a survey or questionnaire, the original measure should be retained.

The patients were asked, “Do you have difficulty walking 15 feet?”

Table 1. Conversions to Metric Measures

Symbol

Known Quantity

Multiply by

To Find

Metric Symbol

Length

in

inches

2.54

centimeters

cm

ft

feet

30

centimeters

cm

ft

feet

0.3

meters

m

yd

yards

0.9

meters

m

miles

1.6

kilometers

km

Area

sq in

square inches

6.5

square centimeters

cm2

sq ft

square feet

0.09

square meters

m2

sq yd

square yards

0.8

square meters

m2

square miles

2.6

square kilometers

km2

Mass

oz

ounces

28

grams

g

lb

pounds

0.45

kilograms

kg

Volume

tsp

teaspoons

5

milliliters

mL

tbsp

tablespoons

15

milliliters

mL

fl oz

fluid ounces

30

milliliters

mL

c

cups

0.24

liters

L

pt

US pints

0.47

liters

L

qt

US quarts

0.95

liters

L

gal

US gallons

3.8

liters

L

cu ft

cubic feet

0.03

cubic meters

m3

cu yd

cubic yards

0.76

cubic meters

m3

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