Rule of law units
1 km2 = 100 ha (hm) = 247.1 acres (acre) = 0.386 square miles (mile)
1 square metre (m) = 10.764 square feet (ft) 1 square metre (are) = 100 square metres (m)
1 ha (hm) = 15 acre = 1 hm2 = 10,000 m2 (m) = 2.471 acre (acre) = 0.01 km2 (where h means 100 m and hm2 means 100 m2)
1 square mile (mile) = 2.590 square kilometres (km)
1 acre (acre) = 0.4047 ha (ha) = 4.047 x 10 km2 (km) = 4047 m2 (m)
1 square foot (ft) = 0.093 square metres (m) 1 square inch (in) = 6.452 square centimetre (cm)
1 square code (yd) = 0.8361 square metres (m)
1 acre = 2000/3 m2 = 666,666 m2
Municipal unit of measure
1 square mile = 22,500 square feet
1 square = 100 square feet
1 square foot = 100 square inch
1 square inch = 100 square inch
1 sqm = 100 sqm
1 sqm = 100 sqm