Belwachakhni is a village in Sidhaw tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Belwachakhni was 1,950 which includes 1,001 males and 949 females. Belwachakhni covers 326.6 ha area. Pincode of Belwachakhni is N/A.