1 newton per square meter. The newton is
the metric unit for force. A newton is the
amount of force needed to accelerate a
weight of 1 kilogram one meter per second.
• Degrees Kelvin or degrees Celsius—For
temperature. The degree Celsius is equal to
14¼5 Fahrenheit degree. Kelvin is in the
Celsius scale and measures temperatures in
the supercold range (–273° and up).
Figure 4-27 illustrates the comparative dry
volume measurements and provides factors for
converting between the U.S. customary and
metric systems. The comparison of liquid
measurements in the customary and metric
systems is shown in Figure 4-28.
The Kelvin (absolute) or the Celsius scale is
easier to understand if seen with the familiar
Fahrenheit. Figure 4-29 shows how tempera-
tures from one scale can be converted to a like
temperature on other scales.
98
Section 1 Introduction to Plumbing
Figure 4-27. Metric and customary dry volume measurements and conversion factors. (Copyright by Polymetric
Services, Inc., Tarzana, CA 91356)
Cubic inch
Cubic centimeter
Cubic foot
Cubic
decimeter
To convert from
cubic inches to: Multipy by: Example:
Gallons 0.004 3674 cu. in. = ______ gal. 3674 × .004 = 14.7 gal.
Cubic feet 0.00058 4677 cu. in. = ______ cu. ft. 4677 × .00058 = 2.712 cu. ft.
Liters 0.016 286 cu. in. = ______ liters 286 × .016 = 4.576 liters
To convert from
cubic feet to: Multipy by: Example:
Gallons 7.48 6.5 cu. ft. = ______ gal. 6.5 × 7.48 = 48.62 gal.
Cubic inches 1728.0 3 cu. ft. = ______ cu. in. 3 × 1728.0 = 5184.0 cu. in.
Liters 28.32 1.5 cu. ft. = ______ liters 1.5 × 28.32 = 42.48 liters
Cubic meters 0.028 278 cu. ft. = ______ cu. meters 278 × .028 = 7.784 cu. meters
Cubic yards 0.037 5687 cu. ft. = ______ cu. yards 5687 × .037 = 210.42 cu. yards