<P> The mapping authority for the United Kingdom , the Ordnance Survey , records the coastline of the main island , Great Britain , as 11,072.76 miles rounding to 11,073 miles ( 17,820 km ) . The British Cartographic Society points out that `` The true answer is : it depends ! '' . If the larger islands are added , the coastline as measured by the standard method at Mean High Water Mark rises to about 19,491 miles ( 31,368 km ) . According to the CIA Factbook , the length of the UK coastline is around 12,429 km or 7,723 miles , although no details are provided about how this figure was calculated . On the basis of EU Marine Strategy Framework Directive boundaries , the UK coastline can be divided into the eastern , Greater North Sea section , which using 1km2 box counts and including islands is 4,994 km , and a western Celtic Seas coastline , which using the same measurement approach and including Northern Ireland is 14,201 km . </P>
<P> The mapping authority for the United Kingdom , the Ordnance Survey , records the coastline of the main island , Great Britain , as 11,072.76 miles rounding to 11,073 miles ( 17,820 km ) . The British Cartographic Society points out that `` The true answer is : it depends ! '' . If the larger islands are added , the coastline as measured by the standard method at Mean High Water Mark rises to about 19,491 miles ( 31,368 km ) . According to the CIA Factbook , the length of the UK coastline is around 12,429 km or 7,723 miles , although no details are provided about how this figure was calculated . On the basis of EU Marine Strategy Framework Directive boundaries , the UK coastline can be divided into the eastern , Greater North Sea section , which using 1km2 box counts and including islands is 4,994 km , and a western Celtic Seas coastline , which using the same measurement approach and including Northern Ireland is 14,201 km . </P>
what is the length of the british coastline
what is the length of the british coastline
11,072.76 miles rounding to 11,073 miles ( 17,820 km )
11,072.76 miles rounding to 11,073 miles ( 17,820 km )