里 (長度單位)

里是東亞傳統的長度單位，起源於中國周代，當時一里為18引=1800尺，戰國、秦漢一里約415.8公尺，後世實際長度歷代不同，傳到日本、朝鮮半島、越南後也有變化；至近代於華語圈也稱作華里以和英里和公里區別。

現在一般1里等於500米，2里等於1公里。

日本大寶律令規定「里＝5町＝300步」1里=533.5米左右，明治維新以後規定1里相當於3.927公里直至現在。

參見

Homer H. Dubs (1938): The History of the Former Han Dynasty by Pan Ku. Vol. One. Translator and editor: Homer H. Dubs. Baltimore. Waverly Press, Inc.
Homer H. Dubs (1955): The History of the Former Han Dynasty by Pan Ku. Vol. Three. Translator and editor: Homer H. Dubs. Ithaca, New York. Spoken Languages Services, Inc.
Hulsewé, A.F.P. (1961). "Han measures." A. F. P. Hulsewé, T'oung pao Archives, Vol. XLIX, Livre 3, pp. 206–207.
Needham, Joseph. (1986). Science and Civilization in China: Volume 4, Physics and Physical Technology, Part 3, Civil Engineering and Nautics. Taipei: Caves Books Ltd.