Online Calculators

cm to inches (cm to in) | centimeters to inches

cm to inches Converter
0.393701 in
3/8 in

1 cm ÷ 2.54 cm/in
= 0.393701 in

Steps to convert units cm to in
Step 1:
Convert centimeters to inches
Divide cm by 2.54 cm/in
1 cm ÷ 2.54 cm/in

Step 2:
Cancel centimeters and inches remain
1 cm ÷ 2.54 cm/in
Then divide numbers to get inches
= 0.393701 in

Step 3: optional
Convert decimal inches to the closest 1/8 of an inch.

Multiply the decimal part by 8 and round to a whole number

Round(0.393701 × 8) = 3

We get 3/8 as the fraction part of inches

1 cm ÷ 2.54 cm/in = 3/8 in

Calculator Use

Convert metric units of centimeters to Imperial and US units of inches. If the number of inches is larger than 12 (12 in = 1 ft) the answer will include feet and inches with fractions if necessary. The inch symbol is in or ", the feet symbol is ft, and the centimeters symbol is cm.

What is cm to inches?

cm to inches is the conversion of length units from cm to inches. There are exactly 2.54 centimeters in 1 inch. To convert from centimeters (cm) to inches (in) divide by 2.54.

Divide cm by 2.54

cm divided by 2.54 is inches or
cm / 2.54 = in

Formula to convert cm to inches, cm / 2.54 = in


1 inch is equal to 2.54 centimeters. For conversions of units we say that there are 2.54 centimeters per inch and write it as 2.54 cm/in. To convert from centimeters to inches, divide cm units by 2.54 cm/in. Centimeters (cm) will cancel and we are left with inches (in) units in the answer.

Example: What is 18 cm in inches?

18 cm to inches is calculated here using division:
18 cm ÷ 2.54 cm/in
Divide through and cancel cm units
18 cm ÷ 2.54 cm/in = 7.086614 in

18 cm = 7.086614 in

Since we are dividing by 2.54 cm/in, that is the same as multiplying by 1/(2.54 cm/in) and 1 divided by 2.54 cm/in is approximately equal to 0.3937 in/cm. Therefore, the alternative calculation for converting centimeters to inches can be performed using multiplication instead as follows: (notice the slightly different answer since we approximated in/cm as 0.3937)

18 cm to inches is calculated here using multiplication:
18 cm × 0.3937 in/cm
Multiply through and cancel cm units
18 cm × 0.3937 in/cm = 7.0866 in

18 cm = 7.0866 in

Quick Conversion
Multiply by
or Divide by
convert inches to centimeters
convert centimeters to inches

Convert Metric units to Imperial and US units

Convert height of 144.5 centimeters to inches.

  • Convert cm to in
  • 144.5 cm × 0.3937 in/cm = 56.89 inches
  • Alternately, 144.5 cm / 2.54 in/cm = 56.89 inches


An inch is a unit of length and has the symbol in or ". Five inches can be expressed as either 5 in or 5". The inch is a unit of length in the British imperial system of units and United States customary units where there are 12 inches in 1 foot. 1 inch is exactly 2.54 centimeters.

Centimeter or Centimetre

A centimeter is a unit of length and has the symbol cm. The spelling centimeter is American while centimetre is the international spelling used by many other countries. The centimeter is a unit of length in the International System of Units where the meter (m) is the base unit of length. There are 100 centimeters in 1 meter and, 1 centimeter is equal to exactly 1/2.54 inches which is approximately 0.3937 inches.


Cite this content, page or calculator as:

Furey, Edward "cm to inches (cm to in) | centimeters to inches" at https://www.calculatorsoup.com/calculators/conversions/cm-to-inches.php from CalculatorSoup, https://www.calculatorsoup.com - Online Calculators

Last updated: August 14, 2023

Follow CalculatorSoup: