| 0km² | 0m² |
| 1km² | 1,000,000m² |
| 2km² | 2,000,000m² |
| 3km² | 3,000,000m² |
| 4km² | 4,000,000m² |
| 5km² | 5,000,000m² |
| 6km² | 6,000,000m² |
| 7km² | 7,000,000m² |
| 8km² | 8,000,000m² |
| 9km² | 9,000,000m² |
| 10km² | 10,000,000m² |
| 11km² | 11,000,000m² |
| 12km² | 12,000,000m² |
| 13km² | 13,000,000m² |
| 14km² | 14,000,000m² |
| 15km² | 15,000,000m² |
| 16km² | 16,000,000m² |
| 17km² | 17,000,000m² |
| 18km² | 18,000,000m² |
| 19km² | 19,000,000m² |
| 20km² | 20,000,000m² |
| 21km² | 21,000,000m² |
| 22km² | 22,000,000m² |
| 23km² | 23,000,000m² |
| 24km² | 24,000,000m² |
| 25km² | 25,000,000m² |
| 26km² | 26,000,000m² |
| 27km² | 27,000,000m² |
| 28km² | 28,000,000m² |
| 29km² | 29,000,000m² |
| 30km² | 30,000,000m² |
| 31km² | 31,000,000m² |
| 32km² | 32,000,000m² |
| 33km² | 33,000,000m² |
| 34km² | 34,000,000m² |
| 35km² | 35,000,000m² |
| 36km² | 36,000,000m² |
| 37km² | 37,000,000m² |
| 38km² | 38,000,000m² |
| 39km² | 39,000,000m² |
| 40km² | 40,000,000m² |
| 41km² | 41,000,000m² |
| 42km² | 42,000,000m² |
| 43km² | 43,000,000m² |
| 44km² | 44,000,000m² |
| 45km² | 45,000,000m² |
| 46km² | 46,000,000m² |
| 47km² | 47,000,000m² |
| 48km² | 48,000,000m² |
| 49km² | 49,000,000m² |
| 50km² | 50,000,000m² |
| 51km² | 51,000,000m² |
| 52km² | 52,000,000m² |
| 53km² | 53,000,000m² |
| 54km² | 54,000,000m² |
| 55km² | 55,000,000m² |
| 56km² | 56,000,000m² |
| 57km² | 57,000,000m² |
| 58km² | 58,000,000m² |
| 59km² | 59,000,000m² |
| 60km² | 60,000,000m² |
| 61km² | 61,000,000m² |
| 62km² | 62,000,000m² |
| 63km² | 63,000,000m² |
| 64km² | 64,000,000m² |
| 65km² | 65,000,000m² |
| 66km² | 66,000,000m² |
| 67km² | 67,000,000m² |
| 68km² | 68,000,000m² |
| 69km² | 69,000,000m² |
| 70km² | 70,000,000m² |
| 71km² | 71,000,000m² |
| 72km² | 72,000,000m² |
| 73km² | 73,000,000m² |
| 74km² | 74,000,000m² |
| 75km² | 75,000,000m² |
| 76km² | 76,000,000m² |
| 77km² | 77,000,000m² |
| 78km² | 78,000,000m² |
| 79km² | 79,000,000m² |
| 80km² | 80,000,000m² |
| 81km² | 81,000,000m² |
| 82km² | 82,000,000m² |
| 83km² | 83,000,000m² |
| 84km² | 84,000,000m² |
| 85km² | 85,000,000m² |
| 86km² | 86,000,000m² |
| 87km² | 87,000,000m² |
| 88km² | 88,000,000m² |
| 89km² | 89,000,000m² |
| 90km² | 90,000,000m² |
| 91km² | 91,000,000m² |
| 92km² | 92,000,000m² |
| 93km² | 93,000,000m² |
| 94km² | 94,000,000m² |
| 95km² | 95,000,000m² |
| 96km² | 96,000,000m² |
| 97km² | 97,000,000m² |
| 98km² | 98,000,000m² |
| 99km² | 99,000,000m² |
The square kilometre is a unit of area and is a multiple of the square metre; an SI derived unit. It has the symbol km².
A square kilometre is equal to the area of a square with edges 1km long. There are 1,000,000 square metres in a square kilometre.
Square kilometres are often used to describe expansive areas of land due to the large unit size.
The square metre is a unit of area and is an SI derived unit with the symbol m².
It was introduced in 1954 when the International System of Units was established and was derived directly from one of the original 6 base units - the metre (m).
It can be prefixed with any of the SI symbols that multiply it up or down such as km² (square kilometre) or µm2 (square micrometre). It is the most commonly used unit of area and is recognised all over the world.