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cm to inches

Convert centimeters to inches — or inches to centimeters — as you type.

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How to use cm to inches

  1. 1Type a length in centimeters to see it in inches.
  2. 2Or type in the inches box to convert inches to cm.
  3. 3Copy the result with one click.
  4. 4Use the chart for common sizes such as screens, paper and heights.

Centimeters and inches

Centimeters are used in most of the world, while inches remain standard in the United States and for many products everywhere: screen sizes, wheel and tire sizes, pipe fittings, jeans waists and photo frames. This converter turns centimeters into inches and inches into centimeters instantly, in whichever box you type.

Formulas

Conversion Formula Example
cm → inches in = cm ÷ 2.54 50 cm ÷ 2.54 = 19.69 in
inches → cm cm = in × 2.54 12 in × 2.54 = 30.48 cm
mm → inches in = mm ÷ 25.4 100 mm = 3.94 in

Height chart

cm Feet and inches cm Feet and inches
150 4′11″ 175 5′9″
155 5′1″ 180 5′11″
160 5′3″ 185 6′1″
165 5′5″ 190 6′3″
170 5′7″ 200 6′7″

Everyday sizes

Item Inches Centimeters
A4 paper 8.27 × 11.69 in 21.0 × 29.7 cm
US Letter paper 8.5 × 11 in 21.6 × 27.9 cm
13-inch laptop screen 13.3 in diagonal 33.8 cm
27-inch monitor 27 in diagonal 68.6 cm
65-inch TV 65 in diagonal 165.1 cm
32-inch waist jeans 32 in 81.3 cm

Related tools

Convert longer distances with km to miles and feet to meters, or switch between any length units — millimeters, yards, nautical miles — with the Unit Converter.

Frequently asked questions

How many centimeters are in an inch?
Exactly 2.54 cm. The inch has been defined as 25.4 millimeters since 1959, so the conversion is exact.
How do I convert cm to inches?
Divide by 2.54. For 30 cm: 30 ÷ 2.54 = 11.81 inches. To go the other way, multiply inches by 2.54.
How do I convert my height in cm to feet and inches?
Divide your height by 2.54 to get inches, then divide by 12: the whole number is feet and the remainder is inches. 175 cm = 68.9 in = 5 ft 8.9 in, usually written 5′9″.
How are screen sizes measured?
TV, monitor and phone sizes are the length of the screen diagonal in inches. A 55-inch TV has a diagonal of about 140 cm; a 6.1-inch phone screen is about 15.5 cm.
What is the easiest way to estimate?
Multiply centimeters by 0.4 for a rough number of inches (10 cm ≈ 4 in), or multiply inches by 2.5 for centimeters. For exact values, use the converter.

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