| 0km² | 0a |
| 1km² | 10,000a |
| 2km² | 20,000a |
| 3km² | 30,000a |
| 4km² | 40,000a |
| 5km² | 50,000a |
| 6km² | 60,000a |
| 7km² | 70,000a |
| 8km² | 80,000a |
| 9km² | 90,000a |
| 10km² | 100,000a |
| 11km² | 110,000a |
| 12km² | 120,000a |
| 13km² | 130,000a |
| 14km² | 140,000a |
| 15km² | 150,000a |
| 16km² | 160,000a |
| 17km² | 170,000a |
| 18km² | 180,000a |
| 19km² | 190,000a |
| 20km² | 200,000a |
| 21km² | 210,000a |
| 22km² | 220,000a |
| 23km² | 230,000a |
| 24km² | 240,000a |
| 25km² | 250,000a |
| 26km² | 260,000a |
| 27km² | 270,000a |
| 28km² | 280,000a |
| 29km² | 290,000a |
| 30km² | 300,000a |
| 31km² | 310,000a |
| 32km² | 320,000a |
| 33km² | 330,000a |
| 34km² | 340,000a |
| 35km² | 350,000a |
| 36km² | 360,000a |
| 37km² | 370,000a |
| 38km² | 380,000a |
| 39km² | 390,000a |
| 40km² | 400,000a |
| 41km² | 410,000a |
| 42km² | 420,000a |
| 43km² | 430,000a |
| 44km² | 440,000a |
| 45km² | 450,000a |
| 46km² | 460,000a |
| 47km² | 470,000a |
| 48km² | 480,000a |
| 49km² | 490,000a |
| 50km² | 500,000a |
| 51km² | 510,000a |
| 52km² | 520,000a |
| 53km² | 530,000a |
| 54km² | 540,000a |
| 55km² | 550,000a |
| 56km² | 560,000a |
| 57km² | 570,000a |
| 58km² | 580,000a |
| 59km² | 590,000a |
| 60km² | 600,000a |
| 61km² | 610,000a |
| 62km² | 620,000a |
| 63km² | 630,000a |
| 64km² | 640,000a |
| 65km² | 650,000a |
| 66km² | 660,000a |
| 67km² | 670,000a |
| 68km² | 680,000a |
| 69km² | 690,000a |
| 70km² | 700,000a |
| 71km² | 710,000a |
| 72km² | 720,000a |
| 73km² | 730,000a |
| 74km² | 740,000a |
| 75km² | 750,000a |
| 76km² | 760,000a |
| 77km² | 770,000a |
| 78km² | 780,000a |
| 79km² | 790,000a |
| 80km² | 800,000a |
| 81km² | 810,000a |
| 82km² | 820,000a |
| 83km² | 830,000a |
| 84km² | 840,000a |
| 85km² | 850,000a |
| 86km² | 860,000a |
| 87km² | 870,000a |
| 88km² | 880,000a |
| 89km² | 890,000a |
| 90km² | 900,000a |
| 91km² | 910,000a |
| 92km² | 920,000a |
| 93km² | 930,000a |
| 94km² | 940,000a |
| 95km² | 950,000a |
| 96km² | 960,000a |
| 97km² | 970,000a |
| 98km² | 980,000a |
| 99km² | 990,000a |
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 are is a unit of area and is a non-SI but metric unit with the symbol a.
It measures exactly 100m² which is the equivalent to 0.0247 acres.
The are is the principle unit for measuring the size of land across the world.