Modern land records across India and Nepal are increasingly kept in hectares — the metric unit of exactly 10,000 square meters — while everyday conversation, older deeds, and local pricing still run on the bigha. Anyone comparing a digitized government record against what the family has always called "three bigha of land" needs this conversion, and needs it with the right regional bigha.
A hectare is 107,639 square feet. Divide that by your bigha size and you have your factor: with the Assam/West Bengal bigha of 14,400 sq ft, one hectare is about 7.47 bigha; with the Nepal Terai bigha of 72,900 sq ft it is about 1.48 bigha. The converter on the home page does this live in both directions, alongside acres, square meters, and every other supported unit.