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Physics > Angle Measurement Units and Equivalents

Angle

Unit Name

Symbol

SI Equivalent

arc minute (minute of arc)

'

2.90888x10^-4 rad

arc second (second of arc)

"

4.84814x10^-6 rad

circumference

6.28319 rad

degree

°

1.74533x10^-2 rad

gon

gr

1.5708x10^-2 rad

grade

gr

1.5708x10^-2 rad

hour of arc

0.261799 rad

milliradian

mrad

1x10^-3 rad

percent

%

9.99967x10^-3 rad

quadrant (angle)

1.5708 rad

radian

rad

1 rad

revolution

rev

6.28319 rad

sign

0.523599 rad

Solid Angle

Unit Name

Symbol

SI Equivalent

spat

sp

12.5664 sr

square arcminute

sq '

8.46159x10^-8 sr

square arcsec

sq "

2.35044x10^-11 sr

square degree

sq °

3.04614x10^-4 sr

steradian

sr

1 sr