Here is list of Indian formula for land measurement in India.
12 Inch = 1 Foot
22 Gaj = 1 Chain
100 Kadi = 1 Chain
1 Square Gaj = 0.836126 Square Meter
1 Square Meter = 1.196 Square Gaj
1 Decimal = 40 Square Meter
1 Kaththa = 2.5 Decimal = 100 Square Meter = 1361.25 Square Feet
1 Beegha = 2304.576036 Square Meter
1 Acer = 32 Kaththa = 4046.80 Square Meter
1 Square Mile = 2.59 Square KM.
Land Measurement Formula in UP
1 Latha= 76 inch
20 Vishvanshi = 1 Vishwa = 500 square hand
20 Vishwa = 1 Beegha = 3025 square Gaj
1 Acer = 1.6 Beegha
8 Beegha = 5 Acre
Land Measurement Formula in West Bangal/Bihar
16 Chhatank = 1 Kaththa = 2.5 Decimal
20 Kaththa = 1 Beegha
1 Acre = 3 Beegha 8 Chhatank = 3.5 Beegha
Land Measurement Formula in Mumbai
20 Kathi = 1 Pond
20 Pond = 1 Beegha = 3925 Square Gaj
6 Beegha = 1 Ruke
20 Ruke = 1 Chahar
Land Measurement Formula in Tamilnadu
12 Inch = 1 Foot
2400 Square Foot = 1 Ground
24 Ground = 1 Kani = 6400 Square Gaj
484 Kani = 1 Square Mile