Japanese Sun (寸) to cm
One Japanese sun is a tenth of a shaku, about 3.03 cm. Carpentry and building still use it, and Japanese timber sizes and tatami dimensions follow it.
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Common values
Formula
cm = 寸 × 3.0303
It matches the Korean chi. The Chinese cun, however, is 3.33 cm — ten per cent larger — so check where a drawing came from.
Frequently asked questions
QHow many cm is 1 寸?
1 寸 is 3.03 cm, and 10 寸 is 30.303 cm. Type any value in the box above to convert instantly.
QAnd how many 寸 is 1 cm?
1 cm is 0.33 寸. This converter works both ways, so typing in the right box updates the left one.
QWhere is this unit used?
It matches the Korean chi. The Chinese cun, however, is 3.33 cm — ten per cent larger — so check where a drawing came from.
Other converters
Hands to cmConvert the horse-height unit to centimetresMils to mmConvert mils (thou) and millimetres both waysAngstroms to nanometresConvert angstroms and nanometres both waysChains to MetersConvert the surveyor’s chain to metresRods to MetersConvert the old surveying rod to metresPoints (pt) to mmConvert typographic points to millimetres
Traditional units (geun, doe, majigi and so on) vary by region and product.