1 helf circles = 3.1415926 radians

Helf circle to radian conversion allow you make a conversion between helf circle and radian easily. You can find the tool in the following.

Angle Conversion

to

input
= 3.14159260
= 0.0314159 × 102
= 0.0314159E2
= 0.0314159e2

= 6.28318520
= 0.0628319 × 102
= 0.0628319E2
= 0.0628319e2

= 9.42477780
= 0.0942478 × 102
= 0.0942478E2
= 0.0942478e2

= 12.56637040
= 0.125664 × 102
= 0.125664E2
= 0.125664e2

= 15.70796300
= 0.15708 × 102
= 0.15708E2
= 0.15708e2

Quick Look: helf circles to radians

1/2 circle or half circle is equal to 360°/2 = 180°. Plural name is helf circles.

Name of unitSymbolDefinitionRelation to SI unitsUnit System
helf circle1/2 circle

≡ 180 °

Metric system SI

conversion table

1= 3.14159266= 18.8495556
2= 6.28318527= 21.9911482
3= 9.42477788= 25.1327408
4= 12.56637049= 28.2743334
5= 15.70796310= 31.415926

The radian is the standard unit of angular measure, used in many areas of mathematics. The length of an arc of a unit circle is numerically equal to the measurement in radians of the angle that it subtends; one radian is just under 57.3 degrees.

Name of unitSymbolDefinitionRelation to SI unitsUnit System

The angle subtended at the center of a circle by an arc whose length is equal to the circle's radius. One full revolution encompasses 2π radians.

Metric system SI

conversion table

1= 0.318309891613576= 1.9098593496814
2= 0.636619783227147= 2.228169241295
3= 0.954929674840728= 2.5464791329086
4= 1.27323956645439= 2.8647890245221
5= 1.591549458067910= 3.1830989161357

1= 3.1415926
0.3183099= 1

Conversion in other languages

You can find the conversion in other languages in the following:

Legend

SymbolDefinition
exactly equal
approximately equal to
=equal to
digitsindicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)