Table A7.1 Units

Imperial Units
Units Definition Typical Use
° degrees angle
deg degrees angle
ft feet length
ft2 square feet area
ft3 cubic feet volume
hr hour time
in inches length
in2 square inch area
in3 cubic inch volume
in4 inches to the fourth power moment of inertia
k kip (1000 pounds) force
k/ft kips per foot (aka klf) distributed linear force
k/ft2 kips per square foot (aka ksf) distributed area force, pressure
k/ft3 kips per cubic foot (aka kcf) density
k/in2 kips per square inch (aka ksi) distributed area force, pressure
k-ft kip-feet moment, torque
lb, lbf pound force
lb/ft pounds per foot (aka plf) distributed linear force
lb/ft2 pounds per square foot (aka psf) distributed area force, pressure
lb/ft3 pounds per cubic foot (aka pcf) density
lb/in2 pounds per square inch (aka psi) distributed area force, pressure
lb-ft pound-feet moment, torque
rad radian angle
yd3 cubic yard volume

Metric Units
Unit Definition Typical Use
° degrees angle
deg degrees angle
g gram mass
hr hour time
kN newton force
kN kiloNewton force
kN/m kiloNewton per meter distributed linear force
kN/m2 kiloNewton per square meter (aka kPa) distributed area force, pressure
kN/m3 kiloNewton per cubic foot density
kN-m kiloNewton-meter moment, torque
m meters length
m2 square meters area
m3 cubic meters volume
min minute time
mm millimeters length
mm2 square millimeters area
mm3 cubic millimeters volume
mm4 millimeters to the fourth power moment of inertia
MN/m2 kiloNewton per square millimeter (aka MPa) distributed area force, pressure
N newton force
N/m newtons per meter distributed linear force
N/m2 newtons per square meter (aka MPa) distributed area force, pressure
N/m3 newtons per cubic meter density
N/mm2 newtons per square millimeter (aka MPa) distributed area force, pressure
Pa newton per square meter (N/m2) distributed area force, pressure
rad radian angle