There can be no equivalence.
A metre is a measure of length in 1-dimensional space while a bigha is a measure of area in 2-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, any attempt at conversion from one to the other is fundamentally flawed.
2468 m2 = 1 bigha
One beegha is equivalent to approximately 5,000 square meters.
One bigha is equal to 1.61875 dismil.
One Hectare has precisely 15.4375Bighas
1 Bigha = 1,369 m2
The bigha is a unit of measurement of area of a land, commonly used in Nepal, Bangladeshand in a few states of India. The precise size of a bigha appears to vary considerably. Sources have given measurements that range from 1,500 to 6,771 square meters, but in several smaller pockets, it is as high as 12,400 square meters.- Wikipedia
2500 square meters are in a bight in Rajasthan.
There are about 3 bigha in an acre. This number will vary depending on the region that you are in.
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1 guntas = 1089 sq. ft. 1 bigha = 14400 sq. ft. so 1guntas = 0.075626 bigha
The number of squares that will fit in a bigha depends on the sizes of the squares. Furthermore, a bigha is not a standard size. For example, a bigha in Western Uttar Pradesh is almost 44 times as large as a bigha in Madhya Pradesh.