| 0ha | 0m² |
| 1ha | 10,000m² |
| 2ha | 20,000m² |
| 3ha | 30,000m² |
| 4ha | 40,000m² |
| 5ha | 50,000m² |
| 6ha | 60,000m² |
| 7ha | 70,000m² |
| 8ha | 80,000m² |
| 9ha | 90,000m² |
| 10ha | 100,000m² |
| 11ha | 110,000m² |
| 12ha | 120,000m² |
| 13ha | 130,000m² |
| 14ha | 140,000m² |
| 15ha | 150,000m² |
| 16ha | 160,000m² |
| 17ha | 170,000m² |
| 18ha | 180,000m² |
| 19ha | 190,000m² |
| 20ha | 200,000m² |
| 21ha | 210,000m² |
| 22ha | 220,000m² |
| 23ha | 230,000m² |
| 24ha | 240,000m² |
| 25ha | 250,000m² |
| 26ha | 260,000m² |
| 27ha | 270,000m² |
| 28ha | 280,000m² |
| 29ha | 290,000m² |
| 30ha | 300,000m² |
| 31ha | 310,000m² |
| 32ha | 320,000m² |
| 33ha | 330,000m² |
| 34ha | 340,000m² |
| 35ha | 350,000m² |
| 36ha | 360,000m² |
| 37ha | 370,000m² |
| 38ha | 380,000m² |
| 39ha | 390,000m² |
| 40ha | 400,000m² |
| 41ha | 410,000m² |
| 42ha | 420,000m² |
| 43ha | 430,000m² |
| 44ha | 440,000m² |
| 45ha | 450,000m² |
| 46ha | 460,000m² |
| 47ha | 470,000m² |
| 48ha | 480,000m² |
| 49ha | 490,000m² |
| 50ha | 500,000m² |
| 51ha | 510,000m² |
| 52ha | 520,000m² |
| 53ha | 530,000m² |
| 54ha | 540,000m² |
| 55ha | 550,000m² |
| 56ha | 560,000m² |
| 57ha | 570,000m² |
| 58ha | 580,000m² |
| 59ha | 590,000m² |
| 60ha | 600,000m² |
| 61ha | 610,000m² |
| 62ha | 620,000m² |
| 63ha | 630,000m² |
| 64ha | 640,000m² |
| 65ha | 650,000m² |
| 66ha | 660,000m² |
| 67ha | 670,000m² |
| 68ha | 680,000m² |
| 69ha | 690,000m² |
| 70ha | 700,000m² |
| 71ha | 710,000m² |
| 72ha | 720,000m² |
| 73ha | 730,000m² |
| 74ha | 740,000m² |
| 75ha | 750,000m² |
| 76ha | 760,000m² |
| 77ha | 770,000m² |
| 78ha | 780,000m² |
| 79ha | 790,000m² |
| 80ha | 800,000m² |
| 81ha | 810,000m² |
| 82ha | 820,000m² |
| 83ha | 830,000m² |
| 84ha | 840,000m² |
| 85ha | 850,000m² |
| 86ha | 860,000m² |
| 87ha | 870,000m² |
| 88ha | 880,000m² |
| 89ha | 890,000m² |
| 90ha | 900,000m² |
| 91ha | 910,000m² |
| 92ha | 920,000m² |
| 93ha | 930,000m² |
| 94ha | 940,000m² |
| 95ha | 950,000m² |
| 96ha | 960,000m² |
| 97ha | 970,000m² |
| 98ha | 980,000m² |
| 99ha | 990,000m² |
The hectare is a unit of area and is a non-SI but metric unit with the symbol ha.
It represents the area equal to that of a square with edges 100m long (ie 1hm² or 10,000m²). This is the equivalent to about 2.47 acres.
Its size is down to its use primary use; that for measuring the size of land.
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.