Company Writer's Guide

Symbols for Units in General Use (Cont’d)

Unit

Symbol

 

Notes

 

 

 

exa

E

SI prefix for 1016.

 

 

 

farad

F

SI unit of capacitance.

 

 

 

fem to

f

SI prefix for 10-15.

 

 

 

 

femtometer

fm

 

 

 

 

 

 

foot

ft

 

 

 

 

 

conventional foot of water

ftH2O

1 ftH2O = 2989.1 Pa (ISO)

 

 

 

 

foot per minute

ft/min

 

 

 

 

 

 

foot per second

ft/s

 

 

 

 

 

 

foot per second squared

ft/s2

 

 

 

 

 

 

foot pound-force

ft-lbf

 

 

 

 

 

footcandle

fc

1 fc = 1 lm/ft2. The name lumen per square foot is

 

 

also used for this unit. Use of the SI unit of

 

 

illuminance, the lux (lumen per square meter), is

 

 

preferred.

 

 

 

footlambert

fL

1 fL . 1/Π) cd/ft2. A unit of luminance. One

 

 

lumen per square foot leaves a surface whose

 

 

luminance is one footlambert in all directions

 

 

within a hemisphere. Use of the SI unit, the

 

 

candela per square meter, is preferred.

 

 

 

gal

Gal

1 Gal = 1 cm/s2 (deprecated,

 

 

see ANSI Z210.1 1976).

 

 

 

gallon

gal

1 galUK = 4.5461 L

 

 

1 gal

= 231 in3 = 3.7854 L

 

 

 

US

gauss

G

The gauss is the electromagnetic CGS unit of

 

 

magnetic flux density. Deprecated

 

 

(see ANSI Z210.1-1976).

 

 

 

giga

G

SI prefix for 109.

 

 

 

 

[For Illustration Only]

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