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Determine the Perimeter of a Circle
Determine the Perimeter of a Circle
Click here to choose another perimeter calculator
The perimeter of a circle can be determined using the following formula:
where P is the perimeter, d is the diameter of the circle, which is exactly twice the length of its radius (r).
Radius (r):
ångström [Å]
arm length
arpent length [Canada]
astronomical unit [AU]
big point [bp][Adobe]
cable length [UK imperial]
cable length [international]
cable length [US]
caliber
chain [ch][Engineer, Ramsden's chain]
chain [ch][metric]
chain [ch][Survey, Gunter's chain]
chi [China]
click [US military]
cubit
didot point [Adobe]
didot point [Europe]
digit [Europe]
douzième
ell [ell][English]
em
fall [English]
fall [Scotland]
fathom [fth]
fermi [fm]
finger
finger [cloth]
fist
fod [Danish]
foot [ft][international]
foot [ft][US, survey]
football field [Canada]
football field [US]
furlong [fur]
gauge [standard]
goad
hand
heer [cloth]
inch [in][international]
inch [in][US, survey]
klafter
lap [international]
league [lea]
li
light-second
light-year [l.y.]
ligne [French]
ligne [Swiss]
line
linear foot [=foot]
linear inch [=inch]
linear meter [=meter]
linear yard [=yard]
link [Gunter's, Surveyor's]
link [Ramsden's, Engineer's]
marathon
marathon [actual distance]
meile [Germany]
meter [m]
millimeter [mm]
centimeter [cm]
kilometer [km]
metre [m]
micron
mil
mile [mi][international]
mile [mi][international nautical]
mile [mi][UK nautical]
mile [mi][US nautical]
mile [mi][US survey]
mile [Admiralty nautical]
mile [Danish]
mile [data]
mile [Irish]
mile [Scottish]
mile [Finnish]
myriameter [mym]
nail
nanon
pace [English]
pace [metric]
palm
parsec [astronomy]
perch
pica
pie [Spain]
point [Adobe]
point [English, US]
point [paper]
point [metric]
pouce [French]
quadrant
quarter [horse racing]
ridge [Welsh]
rod
rood
rope [rope]
sadzhen [Russia]
span [cloth]
tenth meter [Spain]
thou
toise [French1799]
toise [Switzerland]
twip [typographical]
yard [international]
The perimeter of the circle is (P):
ångström [Å]
arm length
arpent length [Canada]
astronomical unit [AU]
big point [bp][Adobe]
cable length [UK imperial]
cable length [international]
cable length [US]
caliber
chain [ch][Engineer, Ramsden's chain]
chain [ch][metric]
chain [ch][Survey, Gunter's chain]
chi [China]
click [US military]
cubit
didot point [Adobe]
didot point [Europe]
digit [Europe]
douzième
ell [ell][English]
em
fall [English]
fall [Scotland]
fathom [fth]
fermi [fm]
finger
finger [cloth]
fist
fod [Danish]
foot [ft][international]
foot [ft][US, survey]
football field [Canada]
football field [US]
furlong [fur]
gauge [standard]
goad
hand
heer [cloth]
inch [in][international]
inch [in][US, survey]
klafter
lap [international]
league [lea]
li
light-second
light-year [l.y.]
ligne [French]
ligne [Swiss]
line
linear foot [=foot]
linear inch [=inch]
linear meter [=meter]
linear yard [=yard]
link [Gunter's, Surveyor's]
link [Ramsden's, Engineer's]
marathon
marathon [actual distance]
meile [Germany]
meter [m]
millimeter [mm]
centimeter [cm]
kilometer [km]
metre [m]
micron
mil
mile [mi][international]
mile [mi][international nautical]
mile [mi][UK nautical]
mile [mi][US nautical]
mile [mi][US survey]
mile [Admiralty nautical]
mile [Danish]
mile [data]
mile [Irish]
mile [Scottish]
mile [Finnish]
myriameter [mym]
nail
nanon
pace [English]
pace [metric]
palm
parsec [astronomy]
perch
pica
pie [Spain]
point [Adobe]
point [English, US]
point [paper]
point [metric]
pouce [French]
quadrant
quarter [horse racing]
ridge [Welsh]
rod
rood
rope [rope]
sadzhen [Russia]
span [cloth]
tenth meter [Spain]
thou
toise [French1799]
toise [Switzerland]
twip [typographical]
yard [international]
Related Information
The SI Unit of Perimeter
meter (m)
More SI units can be found here: List of SI Units
Converter: Length
You can use our length converter to carry out the conversion of length units.
Length Converter
Version 4.0 - Last updated: Sunday, August 16, 2015
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