Unit Systems
UNIT CONVERSIONS
Rev. 0
Page 9
CP-01
UNIT CONVERSIONS
In order to apply measurements from the SI system to the English system, it is
necessary to develop relationships of known equivalents (conversion factors).
These equivalents can then be used to convert from the given units of measure to
the desired units of measure.
EO 1.4
CONVERT between English and SI units of length.
EO 1.5
CONVERT between English and SI units of mass.
EO 1.6
CONVERT time measurements between the following:
a.
Years
b.
Weeks
c.
Days
d.
Hours
e.
Minutes
f.
Seconds
Personnel at DOE nuclear facilties are often exposed to both the English and SI systems of units in
their work. In some cases, the measurements that are taken or read from an instrument will be
different from those required by a procedure.
This situation will require the conversion of
measurements to those required by the procedure.
Conversion Factors
Conversion factors are based on relationships of equivalents from different measurement systems.
These conversion factors are then applied to the given measurement in order to convert it to the units
that are required. The equivalent relationships between different units of measurement are defined in
conversion tables. Some examples from conversion tables are given below.
+
1 yard
=
.9144 meters
+
1 kilogram
=
2.205 pounds mass (lbm)
+
1 hour
=
3600 seconds
