# 1 decimetre

From Infogalactic: the planetary knowledge core

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To help compare different orders of magnitude this page lists lengths between 10 centimetres and 100 centimetres (10^{−1} metre and 1 metre).

**Distances shorter than 10 centimetres**

## Contents

## Conversions

10 centimetres (abbreviated to 10 cm) is equal to:

- 1 decimetre (dm), a term not in common use
- 100 millimetres
- 3.9 inches
- a side of a square of area 0.01 m
^{2}^{[note 1]} - the edge of a cube with a volume of ×10
^{−3}1^{[note 1]}(one litre)

## Wavelengths

- 10 cm = 1.0 dm
^{[note 1]}– wavelength of the highest UHF radio frequency, 3 GHz - 12 cm = 1.2 dm – wavelength of the 2.45 GHz ISM radio band
- 21 cm = 2.1 dm – wavelength of the 1.4 GHz hydrogen emission line, a hyperfine transition of the hydrogen atom
- 100 cm = 10 dm – wavelength of the lowest UHF radio frequency, 300 MHz

## Human-defined scales and structures

- 10.16 cm = 1.016 dm – 1 hand used in measuring height of horses (4 inches)
- 12 cm = 1.2 dm – diameter of a Compact Disc (CD) (= 120 mm)
- 15 cm = 1.5 dm – length of a Bic pen with cap on
- 22 cm = 2.2 dm – diameter of a typical Association football (soccer ball)
- 30.48 cm = 3.048 dm – 1 foot (measure)
- 30 cm = 3 dm – typical school-use ruler length (= 300 mm)
- 60 cm = 6 dm – standard depth (front to back) of a domestic kitchen worktop in Europe (= 600 mm)
- 90 cm = 9 dm – average length of a rapier, a fencing sword
^{[1]} - 91.44 cm = 9.144 dm – one yard (measure)

## Nature

- 10 cm = 1 dm – diameter of the human cervix upon entering the second stage of labour
^{[citation needed]} - 15 cm = 1.5 dm – approximate size of largest beetle species
^{[citation needed]} - 29 cm = 2.9 dm – length of average human foot
^{[citation needed]} - 29.98 cm = 2.998 dm – distance light travels in one nanosecond
- 31 cm = 3.1 dm – wingspan of largest butterfly species
*Ornithoptera alexandrae*^{[citation needed]} - 50 to 65 cm = 5–6.5 dm – a pizote's tail
^{[citation needed]} - 66 cm = 6.6 dm – length of the longest pine cones (produced by the Sugar pine
^{[2]})

## See also

## Notes

- ↑
^{1.0}^{1.1}^{1.2}*m*is an abbreviation of metre;*cm*of centimetre;*dm*of decimetre;*m*is short for square metre;^{2}*m*is short for cubic metre^{3}

## References

- ↑ "What is a rapier - Renaissance swords Rapiers". 2-Clicks Swords.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- ↑ Bohun B. Kinloch, Jr. and William H. Scheuner. "Pinus lambertiana". Archived from the original on 8 June 2011. Retrieved June 2011. Check date values in:
`|accessdate=`

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