Chi 尺
About the Chi
The Chinese chi, often translated as foot, was set at exactly one third of a metre in the market system of 1929. Its length varied considerably across dynasties. One chi is ten cun, and ten chi make a zhang.
Related Units
Shaku
尺10/33 m ≈ 30.30 cm
The shaku is the Japanese foot, fixed by the 1891 Weights and Measures Act at exactly 10/33 of a metre. It descends...
Li
里500 m (market li)
The Chinese li is now exactly 500 metres. Historically its length changed many times, but it was always the main unit...
Metre
mBase unit; c = 299,792,458 m/s exactly
The metre is the length of the path travelled by light in vacuum in 1/299,792,458 of a second. It was first defined by...
Ångström
Å1 Å = 10⁻¹⁰ m = 0.1 nm (exact)
The ångström equals one ten-billionth of a metre, roughly the size of an atom. It is named after the Swedish physicist...