The following is a partial list of everyday units used to calculate land area in Nepal. 1 Bigha (बिघा) = 20 Kattha (कठ्ठा) 1 Bigha (बिघा) = 6772.63 m² 1 Bigha (बिघा) = 72900 sq.ft. 1 Bigha (बिघा) = 13.31 Ropani 1 Katha (कठ्ठा) = 20 Dhur (धुर) 1 Katha (कठ्ठा) = 338.63 m² 1 Katha (कठ्ठा) = 3645 sq.ft. 1 Dhur (धुर) = 16.93 m² 1 Dhur (धुर) = 182.25 sq.ft. 1 Ropani (रोपनी)= 16 aana (आना) 1 Ropani (रोपनी)= 64 Paisa (पैसा) 1 Ropani (रोपनी)= 508.72 m² 1 Ropani (रोपनी)= 5476 sq.ft. 1 Ropani (रोपनी)= 256 Daam (दाम) 1 Ropani = 4 llka 1 Khetmuri = 25 Ropani 1 Aana (आना)= 4 Paisa (पैसा) 1 Aana (आना)= 31.80 m² 1 Aana (आना) = 342.25 sq. ft. 1 Aana (आना) = 16 Daam (दाम) 1 Paisa (पैसा) = 4 Daam (दाम) 1 Paisa (पैसा) = 7.95 m² 1 Paisa (पैसा) = 85.56 sq. ft. 1 Daam (दाम) = 1.99 m² 1 Daam (दाम) = 21.39 sq. ft. Length [ edit ] The kos (kosh, krosh, koss) is a very ancient measure of distance, measuring about 2.25 miles or 3.7 km. [3] 1 angul = approx. 0.75 inch 4 angul =