How many centimeters in an inch – Inches to cm — How many centimeters in an inch?

cm to inches — centimeters to inches conversion


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Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select ‘decimal’ from the options above the result.

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

Note: For a pure decimal result please select ‘decimal’ from the options above the result.

Abbreviations commonly used when discussing centimeters and inches:

  • Centimeters -cm
  • Meters — m
  • Inches — «
  • Feet — ‘

Centimeters are a metric unit commonly used to measure small distances. To give some idea of size, a credit card is approx. 8.5 cm * 5.5cm or 3 1/3rd» * 2 1/8th». In the metric system, centi always indicates 1/100th, so a centimeter is 1/100th of a meter. This number system is a bit easier to grasp than inches and feet, where an inch is 1/12th of a foot.

To convert cm to inches:

Multiply your centimeters value by 0.39370

Quick and easy cm to inches conversion:

You can get a pretty accurate answer by multiplying centimeters by four, then dividing by ten.
For instance, if you have 1cm, 1cm*4 = 4, 4/10 = .4inches
The actual answer is 0.3937008inches, so this rule of thumb is only .6% away from the real answer — close enough for most purposes.

Centimeters to Inches formula

in =

cm * 0.39370




Popular cm to inches conversions from this site:

  • 1cm in inches — 0.3937008in
  • 30cm in inches — 11.81102in = approx. 1 foot (1 ft = 12″)

Inches to cm | inches to centimeters converter

Inches (″) to centimeters (cm) conversion calculator and how to convert.

cm to inches ►

How to convert inches to centimeters

1 inch is equal to 2.54 centimeters:

1″ = 2.54cm

The distance d in centimeters (cm) is equal to the distance d in inches (″) times 2.54:

d(cm) = d(inch) × 2.54


Convert 20 inches to centimeters:

d(cm) = 20″ × 2.54 = 50.8cm

Inches to centimeters conversion table

Inches («)Centimeters (cm)
0.01 in0.0254000 cm
1/64 in0.0396875 cm
1/32 in0.0793750 cm
1/16 in0.15875 cm
0.1 in0.2540 cm
1/8 in0.3175 cm
1/4 in0.635 cm
1/2 in1.27 cm
1 in2.54 cm
2 in5.08 cm
3 in7.62 cm
4 in10.16 cm
5 in12.70 cm
6 in15.24 cm
7 in17.78 cm
8 in20.32 cm
9 in22.86 cm
10 in 25.40 cm
20 in50.80 cm
30 in76.20 cm
40 in101.60 cm
50 in127.00 cm
60 in152.40 cm
70 in177.80 cm
80 in203.20 cm
90 in228.60 cm
100 in254.00 cm


cm to inches ►


See also

Convert centimeters to inches — Conversion of Measurement Units

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How many centimeters in 1 inches?
The answer is 2.54.
We assume you are converting between centimetre and inch.
You can view more details on each measurement unit:
centimeters or
The SI base unit for length is the metre.
1 metre is equal to 100 centimeters, or 39.370078740157 inches.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between centimetres and inches.
Type in your own numbers in the form to convert the units!

You can do the reverse unit conversion from
inches to centimeters, or enter any two units below:

A centimetre (American spelling centimeter, symbol cm) is a unit of length that is equal to one hundreth of a metre, the current SI base unit of length. A centimetre is part of a metric system. It is the base unit in the centimetre-gram-second system of units. A corresponding unit of area is the square centimetre. A corresponding unit of volume is the cubic centimetre.

The centimetre is a now a non-standard factor, in that factors of 103 are often preferred. However, it is practical unit of length for many everyday measurements. A centimetre is approximately the width of the fingernail of an adult person.

An inch is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and 12 inches in a foot. The inch is usually the universal unit of measurement in the United States, and is widely used in the United Kingdom, and Canada, despite the introduction of metric to the latter two in the 1960s and 1970s, respectively. The inch is still commonly used informally, although somewhat less, in other Commonwealth nations such as Australia; an example being the long standing tradition of measuring the height of newborn children in inches rather than centimetres. The international inch is defined to be equal to 25.4 millimeters. provides an online
conversion calculator for all types of measurement units.
You can find metric conversion tables for SI units, as well
as English units, currency, and other data. Type in unit
symbols, abbreviations, or full names for units of length,
area, mass, pressure, and other types. Examples include mm,
inch, 100 kg, US fluid ounce, 6’3″, 10 stone 4, cubic cm,
metres squared, grams, moles, feet per second, and many more!

cm to inches | centimeters to inches conversion

Centimeters (cm) to inches (″) conversion calculator and how to convert.

Inches to cm ►

How to convert centimeters to inches

1 centimeter is equal to 0.3937007874 inches:

1cm = (1/2.54)″ = 0.3937007874″

The distance d in inches (″) is equal to the distance d in
centimeters (cm) divided by 2.54:

d(″) = d(cm) / 2.54


Convert 20 cm to inches:

d(″) = 20cm / 2.54 = 7.874″

Centimeters to inches conversion table

The fraction inches are rounded to 1/64 resolution.

Centimeters (cm)Inches («)
Inches («)
0.01 cm0.0039 in0 in
0.1 cm0.0394 in3/64 in
1 cm0.3937 in25/64 in
2 cm0.7874 in25/32 in
3 cm1.1811 in1 3/16 in
4 cm1.5748 in1 37/64 in
5 cm1.9685 in1 31/32 in
6 cm2.3622 in2 23/64 in
7 cm2.7559 in2 3/4 in
8 cm3.1496 in3 5/32 in
9 cm3.5433 in3 35/64 in
10 cm3.9370 in3 15/16 in
20 cm7.8740 in7 7/8 in
30 cm11.8110 in11 13/16 in
40 cm15.7840 in15 3/4 in
50 cm19.6850 in19 11/16 in
60 cm23.6220 in23 5/8 in
70 cm27.5591 in27 9/16 in
80 cm31.4961 in31 1/2 in
90 cm35.4331 in35 7/16 in
100 cm39.3701 in39 3/8 in


Inches to cm ►


See also

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