Manual

Units and constants 443

Units and constants

Units

A unit of measurement—such as inch, ohm, or

Becquerel—enables you to give a precise magnitude to a

physical quantity.

You can attach a unit of measurement to any number or

numerical result. A numerical value with units attached is

referred to as a measurement. You can operate on

measurements just as you do on numbers without attached

units. The units are kept with the numbers in subsequent

operations.

The units are on the Units menu. Press

SF (Units)

and, if necessary, tap .

The menu is organized by category. Each category is

listed at the left, with the units in the selected category

listed at the right.

Unit categories

• length

• area

• volume

• time

• speed

• mass

• acceleration

• force

• energy

• power

• pressure

• temperature

• electricity

• light

• angle

• viscosity

• radiation