Company Writer's Guide
[For Illustration Only] B-14
Symbols for Units in General Use (Cont’d)
Unit Symbol Notes
newton per square meter N/m
2
SI unit of pressure or stress, see pascal.
nit nt 1 nt = 1 cd/m
2
The name nit is sometimes given to the SI unit of
luminance, the candela per square meter.
oersted Oe
The oersted is the electromagnetic CGS unit of
magnetic field strength. Deprecated
(see ANSI Z210.1-1976).
ohm
Ω
SI unit of resistance.
ounce (avoirdupois) oz
pascal Pa
1 Pa = 1 N/m
2
SI unit of pressure or stress.
pascal second Pa•s SI unit of dynamic viscosity.
peta P SI prefix for 10
15
phot ph 1 ph = lm/cm
2
CGS unit of illuminance. Deprecated
(see ANSI Z210.1-1976).
pico p SI prefix for 10
-15
.
picofarad pF
picowatt pW
pint pt 1 pt (UK) = 0.568 26 L
1 pt (US dry) = 0.550 61 L
1 pt (US liquid) = 0.473 18 L
poise P Deprecated (see ANSI Z210.1-1976).
pound lb
pound per cubic foot lb/ft
3
pound-force lbf
