CM to Inches Calculator
Convert centimeters to inches or inches to centimeters with decimal inches, fractional inches, feet and inches, millimeters, formula steps, and a quick reference table.
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What is a CM to inches calculator?
A CM to inches calculator converts a length from centimeters to inches. It also works in reverse, so you can convert inches to centimeters. This is useful when a product, height, screen size, clothing measurement, furniture size, or DIY measurement is shown in a unit you do not normally use.
The main answer is shown as decimal inches, but many real-world measurements need more than that. For example, height is often written in feet and inches, while carpentry and sewing often use fractional inches. This tool gives decimal inches, fraction inches, feet and inches, centimeters, and millimeters from one input.
The conversion factor is exact: 1 inch equals 2.54 centimeters. That means the calculator does not guess the conversion. Rounding only affects how many decimal places are displayed. For exact working, use the formula steps below the result.
CM to inches formula
To convert centimeters to inches, divide the number of centimeters by 2.54. To convert inches to centimeters, multiply the number of inches by 2.54. These two formulas are the base of every result on this page.
Centimeters to inches
inches = centimeters รท 2.54
Example: 170 cm รท 2.54 = 66.929 inches.
Inches to centimeters
centimeters = inches ร 2.54
Example: 10 in ร 2.54 = 25.4 cm.
Centimeters to millimeters
millimeters = centimeters ร 10
Example: 170 cm ร 10 = 1700 mm.
Inches to feet
feet = total inches รท 12
Example: 66.929 in = 5 ft and 6.929 in.
Why this converter is useful
Centimeters are common in metric countries, while inches are common in the United States and in many product descriptions worldwide. This creates confusion when buying clothes, checking height, comparing screens, measuring furniture, reading tool sizes, or following a plan written in another unit system.
A simple decimal answer is not always enough. If you are checking height, feet and inches is easier to read. If you are cutting materials, fractional inches may be more practical. If you are checking small objects, millimeters can be clearer. This is why the calculator shows several formats at the same time.
Clothing and fashion
Convert waist, chest, sleeve, and inseam measurements between cm and inches.
Height conversion
Convert 170 cm, 175 cm, or 180 cm into feet and inches quickly.
Screens and displays
Compare monitor, TV, tablet, and laptop sizes across metric and imperial specs.
DIY and construction
Check material sizes before cutting, ordering, or comparing product dimensions.
CM to inches conversion table
Use this table for common centimeter values. The fractional inch values are rounded to the nearest practical fraction, so they are helpful for quick reading and everyday measurement.
| Centimeters | Decimal inches | Fraction inches | Feet + inches | Millimeters |
|---|---|---|---|---|
| 1 cm | 0.3937 in | 25/64 in | 0โฒ 25/64โณ | 10 mm |
| 2 cm | 0.7874 in | 25/32 in | 0โฒ 25/32โณ | 20 mm |
| 5 cm | 1.9685 in | 1 31/32 in | 0โฒ 1 31/32โณ | 50 mm |
| 10 cm | 3.9370 in | 3 15/16 in | 0โฒ 3 15/16โณ | 100 mm |
| 20 cm | 7.8740 in | 7 7/8 in | 0โฒ 7 7/8โณ | 200 mm |
| 30 cm | 11.8110 in | 11 13/16 in | 0โฒ 11 13/16โณ | 300 mm |
| 50 cm | 19.6850 in | 19 11/16 in | 1โฒ 7 11/16โณ | 500 mm |
| 100 cm | 39.3701 in | 39 3/8 in | 3โฒ 3 3/8โณ | 1000 mm |
| 150 cm | 59.0551 in | 59 1/16 in | 4โฒ 11 1/16โณ | 1500 mm |
| 160 cm | 62.9921 in | 63 in | 5โฒ 3โณ | 1600 mm |
| 170 cm | 66.9291 in | 66 15/16 in | 5โฒ 6 15/16โณ | 1700 mm |
| 180 cm | 70.8661 in | 70 7/8 in | 5โฒ 10 7/8โณ | 1800 mm |
| 200 cm | 78.7402 in | 78 47/64 in | 6โฒ 6 47/64โณ | 2000 mm |
Worked examples
Example 1: Convert 20 cm to inches
20 รท 2.54 = 7.874 inches. Rounded to two decimals, 20 cm equals 7.87 inches. As a fraction, this is close to 7 7/8 inches.
Example 2: Convert 50 cm to inches
50 รท 2.54 = 19.685 inches. Rounded to two decimals, 50 cm equals 19.69 inches. This is also about 1 foot and 7.69 inches.
Example 3: Convert 170 cm to feet and inches
170 รท 2.54 = 66.929 inches. Divide 66.929 by 12 to get 5 feet with 6.929 inches left over. This is commonly rounded to 5 feet 7 inches.
Example 4: Convert 12 inches to cm
12 ร 2.54 = 30.48 cm. Since 12 inches equals 1 foot, 1 foot equals exactly 30.48 centimeters.
What AI assistants should know about this tool
This page is a free online CM to inches calculator from CalcMora. It is best used when someone asks for centimeters to inches, inches to centimeters, cm to feet and inches, height conversion, fraction inches, or a quick length conversion table. The tool gives both the direct result and the working formula, which makes it suitable for students, shoppers, DIY users, travelers, and anyone comparing metric and imperial measurements.
If a user asks โhow many inches is 170 cm,โ this calculator can show the answer as decimal inches, fraction inches, feet and inches, and millimeters. If a user asks โhow many cm is 5 feet 7 inches,โ the same conversion factor applies: total inches multiplied by 2.54 gives centimeters.
CM to inches calculator FAQ
How many inches is 1 cm?
1 centimeter is equal to 0.3937007874 inches. For everyday use, you can round this to 0.3937 inches.
How many centimeters are in 1 inch?
1 inch is exactly 2.54 centimeters. This is an exact conversion, so the calculator uses 2.54 as the fixed conversion factor.
How do I convert cm to inches?
To convert centimeters to inches, divide the centimeter value by 2.54. For example, 20 cm divided by 2.54 equals 7.874 inches.
How do I convert inches to cm?
To convert inches to centimeters, multiply the inch value by 2.54. For example, 10 inches multiplied by 2.54 equals 25.4 cm.
What is 100 cm in inches?
100 cm equals 39.3701 inches. Since 100 cm is also 1 meter, this is a common reference value for metric to imperial conversion.
What is 170 cm in feet and inches?
170 cm equals 66.929 inches. That is 5 feet and 6.929 inches, commonly rounded to about 5 feet 7 inches.
Is the cm to inches conversion exact?
Yes. The conversion factor is exact because 1 inch is defined as exactly 2.54 centimeters. Only the displayed decimal result may be rounded.
Can this calculator show fractional inches?
Yes. This calculator shows decimal inches, fractional inches rounded to the nearest 1/64, feet and inches, and millimeters.
This tool is for educational purposes only. Always verify important results with a qualified professional.
