Inches



=

Centimetres

Enter the value to convert into the box and modify the accuracy of the conversion by selecting number of significant figures or decimal places by clicking on the boxes provided.

Conversion Formulae

The conversion formula for centimetres (cm) to inches (in) conversions is as follows:

  • 1 centimetre = 0.39370079 inches

The conversion formula for inches (in) to centimetres (cm) conversions is as follows:

  • 1 inch = 2.54 centimetres
Centimetres

The centimetre is 1/100 of a metre and are often used when measuring a persons height.

Unit System

SI Metric

Definition

The centimetre is defined as one hundredth of a metre.

Base Unit

Metre

Abbreviation

Formal: cm

Information

The centimetre is an SI metric unit of length with the standard SI prefix centi indicating that it is 10-2 metres.

Centimetres are the closest metric unit to the inch and are commonly shown on rulers alongside inches in countries that formerly used the inch as a unit of measurement.

More Information

Wikipedia: Centimetre

BIPM: SI Standard Prefixes

Global Adoption

Centiimetres are used worldwide for scientific applications and in the vast majority of countries worldwide in day to day use. The major exceptions being the United States and Liberia, where the metric system has not been adopted. In the UK, Canada and other former British Commonwealth countries metric units such as the centimetre may not be used all the time.

Conversion Formulae

  • 1 millimetre = 1,000 micrometres
  • 1 millimetre = 0.1 centimetres
  • 1 millimetre = 0.01 decimetres
  • 1 millimetre = 0.001 metres
  • 1 millimetre = 0.0001 decametres
  • 1 millimetre = 0.00001 hectometres
  • 1 millimetre = 0.000001 kilometres
  • 1 millimetre = 0.000000001 megametres

 

  • 1 micrometre = 0.001 millimetres
  • 1 centimetre = 10 millimetres
  • 1 decimetre = 100 millimetres
  • 1 metre = 1,000 millimetres
  • 1 decametre = 10,000 millimetres
  • 1 hectometre = 100,000 millimetres
  • 1 kilometre = 1,000,000 millimetres
  • 1 megametre = 1,000,000,000 millimetres
Inches

The inch is 1/36th of a yard, it is often used for measuring height, together with feet, in countries that use or have used Imperial or US Customary measurements.

Unit System

Imperial & US Customary

Definition

The inch is defined as 1/36th of a yard.

Base Unit

Yard

Abbreviation

Formal: in

The abbreviation ins is sometimes seen for greater than one inch.

Information

The inch derives from Roman unciae (twelfth parts of a Roman foot) with Roman measurements being in use in Great Britain this unit may well have continued in use after the Romans left.

The earliest recorded definition of the inch defines it as three barleycorns in length, however this definition was around 1300 in the 'The Composition of Yards and Perches' according to some sources. However the Liber Horn (1311), an early book of English statutes, suggests that the inch was defined 1/36th part of an iron yard held by the king.

At some point prior to the implementation of the Weights and Measures Act of 1824 the inch had become defined as 1/36th of a yard via 36in = 3ft = 1yd and the use of standard yards. The Weights and Measures Act of 1824 was used to remove any ambiguity of definitions left by prior statutes.

More Information

Wikipedia: Inch

Wikipedia: Liber Horn (1311) author Andrew Horn

UK National Archives: Liber Horn

Wikipedia: Composition of Yards and Perches

Wikipedia: UK Weights and Measures Acts

Global Adoption

Inches are a standard unit of length in the United States and Liberia and are still used informally in the United Kingdom and other British Commonwealth countries that formerly used Imperial units as standard.

Conversion Formulae

  • 1 inch = 0.25 hands
  • 1 inch = 0.083333333 feet
  • 1 inch = 0.027777778 yards
  • 1 inch = 0.001262626 chains
  • 1 inch = 0.000126263 furlongs
  • 1 inch = 0.000015783 miles

Conversions accurate to 9 decimal places.

  • 1 hand = 4 inches
  • 1 foot = 12 inches
  • 1 yard = 36 inches
  • 1 chain = 792 inches
  • 1 furlong = 7,920 inches
  • 1 mile = 63,360 inches

Conversions accurate to 9 decimal places.

Common Conversions cm to in
cmin
10.39
20.79
31.18
41.57
51.97
62.36
72.76
83.15
93.54
103.94
cmin
103.94
207.87
3011.81
4015.75
5019.69
6023.62
7027.56
8031.50
9035.43
10039.37
cmin
10039.37
20078.74
300118.11
400157.48
500196.85
600236.22
700275.59
800314.96
900354.33
1,000393.70
Common Conversions in to cm
incm
12.54
25.08
37.62
410.16
512.70
615.24
717.78
820.32
922.86
1025.40
1127.94
1230.48
incm
1230.48
2460.96
3691.44
48121.92
60152.40
72182.88
84213.36
96243.84
108274.32
120304.80
132335.28
144365.76
Other Converters

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•   Temperatures

•   Areas

•   Speeds

•   Volumes

 
 
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