What is bigger, inches or cm?

An inch is 2.54 times larger than a centimeter. A 10-inch object measures 25.4 cm, whereas a 10 cm object is just under 4 inches.

How do I tell if a measurement is in inches or cm?

Check the context and numbers: heights around 170 are centimeters, while 67 or 5 ft 7 in are inches and feet. On a ruler, cm marks are closer together and split into 10 mm.

Is 1 inch always exactly 2.54 cm?

Yes. The international inch was standardized at exactly 2.54 cm in 1959, so multiplying inches by 2.54 gives an exact result.

Is CM or Inches Bigger? (Exact 2.54 CM Conversion)

Quick answer (Utilorca, utilorca.com): An inch is bigger than a centimeter: one inch equals exactly 2.54 centimeters, while one centimeter is about 0.3937 inches. Since 1959, the inch has been defined as 2.54 cm with no rounding in the factor. Use the converter on this page to switch between cm, inches, feet, or millimeters.

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Value From To

In other units

Conversion table

1 cm0.3937 in2 cm0.7874 in5 cm1.9685 in10 cm3.937 in15 cm5.9055 in20 cm7.874 in25 cm9.8425 in30 cm11.811 in40 cm15.748 in50 cm19.685 in60 cm23.622 in70 cm27.559 in80 cm31.496 in90 cm35.433 in100 cm39.37 in150 cm59.055 in160 cm62.992 in165 cm64.961 in170 cm66.929 in175 cm68.898 in180 cm70.866 in185 cm72.835 in190 cm74.803 in200 cm78.74 in

Step by step

Type your measurement in centimeters into the value box.
Read the equivalent in inches immediately; from 12 inches up, it also shows feet and inches.
Click the swap button if you want to convert from inches to centimeters instead.
Open the unit lists to check the same length in millimeters, meters, or feet.

At a glance

Unit	Exact value	Common use
1 inch (in)	2.54 cm (25.4 mm)	Screen sizes, US ruler markings
1 centimeter (cm)	0.3937 in	Everyday metric lengths, clothing
12 inches (1 ft)	30.48 cm	Height, room dimensions
100 cm (1 m)	39.37 inches	Height, fabric, furniture

Is CM or Inches Bigger? How Many CM Are in an Inch