里 (长度单位)

里是东亚传统的长度单位，起源于中国周代，当时一里为18引=1800尺，战国、秦汉一里约415.8米，后世实际长度历代不同，传到日本、朝鲜半岛、越南后也有变化；至近代于华语圈也称作华里以和英里和公里区别。

现在一般1里等于500米，2里等于1公里。

日本大宝律令规定“里＝5町＝300步”1里=533.5米左右，明治维新以后规定1里相当于3.927公里直至现在。

参见

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.