decimetre
Sign in to saveThe decimetre (' in American English; symbol: dm') is a unit of length in the International System of Units, equal to one tenth of a metre, ten centimetres, one hundred millimetres, and 3.937 inches.
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A decimetre is a unit of measurement equal to one tenth of a metre (or about 3.937 inches), commonly used in the metric system. It's a convenient size for measuring everyday objects that are too large for centimetres but too small for metres.
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Key facts
- Unit.name
- decimetre
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- Cd 3d.png
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- A standard CD is in diameter.
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- dm
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- SI
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- length
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- SI base units
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- imperial/US units
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The decimetre (' in American English; symbol: dm') is a unit of length in the International System of Units, equal to one tenth of a metre, ten centimetres, one hundred millimetres, and 3.937 inches.
The common non-SI metric unit of volume, the litre, is defined as one cubic decimetre, although, from 1901 to 1964, there was a slight difference between the two due to the litre being defined using the kilogram rather than the metre.