• Meter square
• 1 square foot = 144 square inches
• square metres (m2)
• square centimetres (cm2)
• square millimetres (mm2)
• square kilometres (km2)
• square feet (ft2)
• square yards (yd2)
• square miles (mi2)
• 1 square yard = 9 square feet
• 1 are = 100 square metres
• 1 hectare = 100 ares = 10,000 square metres = 0.01 square kilometres
• 1 acre = 4,840 square yards = 43,560 square feet.
• 1 barn = 10−28 square meters.

Some traditional South Asian units that have fixed value:

• 1 Killa = 1 acre
• 1 Ghumaon = 1 acre
• 1 Kanal = 0.125 acre (1 acre = 8 kanal)
• 1 Decimal = 48.4 square yards
• 1 Chatak = 180 square feet

• 1 Bigha = 2529.29 sq.mt.