Shilnu Kalas is a village in Nahan tehsil in district of Sirmaur, Himachal Pradesh, India. As per the data provided by Census of India in 2011, total population of Shilnu Kalas was 187 which includes 96 males and 91 females. Shilnu Kalas covers 69 ha area. Pincode of Shilnu Kalas is 173001.