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The hectometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: hm) or hectometer (American spelling) is an uncommonly used unit of length in the metric system, equal to one hundred metres. It derives from the Greek word "ekato", meaning "hundred". A regulation football or soccer field is approximately 1 hectometre in length. *For area the square hectometer (hm2) is a common unit. It is more commonly known by the name of hectare (ha), meaning 100 ares (100 a). The are is a measurement of area the size of 1 decametre by 1 decametre, which is 10 metres by 10 metres. Hence 100 ares equals an area with dimensions 100 m by 100 m — 1 hectometre by 1 hectometre, the square hectometre — equalling 10,000 square metres (10,000 m2) *For volumes the cubic hectometre (hm3) is also used, 100 m by 100 m by 100 m equalling 1,000,000 cubic metres (1,000,000 m3). *Conversion of units, for comparison with other units To compare different orders of magnitude this page lists lengths between 100 metres and 1000 metres (1 kilometre). Distances shorter than 100 metres ==Conversions== 100 metres (sometimes termed a hectometre) is equal to: * 328 feet * one side of a 1 hectare square * a fifth of a modern li, a Chinese unit of measurement * the approximate distance travelled by light in 300 nanoseconds. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「hectometre」の詳細全文を読む スポンサード リンク
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