Convert inches to centimeters

1 in=2.54cm

Use the converter below to change any inches value into centimeters instantly — with formula, conversion table, and real-world examples.

You have

Equals

2.54

Conversion formula

Forward

centimeters = inches × 2.54

Reverse

inches = centimeters × 0.3937

Example: 10 in × 2.54 = 25.4 cm.

About both units

From

Inch

The inch equals 2.54 centimeters exactly since 1959. It is the global standard for screen diagonal sizes — a "55-inch TV" has a 139.7 cm diagonal. Pipe diameters, US and UK shoe sizes, and hard-drive form factors are all specified in inches. 1 inch = 1/12 foot = 1/36 yard.

Real-world: A 65-inch TV has a 165 cm diagonal. A smartphone screen is typically 6–7 inches. Standard copper plumbing in the UK is ½ inch or ¾ inch.

Read full inch reference →

Centimeter

The centimeter equals one hundredth of a meter and is the everyday metric unit for body measurements, clothing sizes and furniture. European clothing tags, height on ID documents and household rulers are all marked in cm. An A4 sheet is 21 × 29.7 cm.

Real-world: An average adult is 160–185 cm tall. An A4 sheet is 21 × 29.7 cm. A standard passport photo is 3.5 × 4.5 cm.

Read full centimeter reference →

Inch to Centimeter conversion table

Common inches to centimeters values for quick reference.

Inch (in)	Centimeter (cm)
1 in	2.54 cm
5 in	12.7 cm
10 in	25.4 cm
25 in	63.5 cm
50 in	127 cm
100 in	254 cm
250 in	635 cm
500 in	1,270 cm
1,000 in	2,540 cm
5,000 in	12,700 cm

Tips & common mistakes

Quick tips

1 inch = 2.54 cm exactly by international agreement — no rounding.
Screen sizes are always diagonal, never width. A 27-inch monitor is about 60 cm wide.
To convert cm to inches mentally, divide by 2.5 and subtract 1.6%.

Avoid these

Reading a screen size as width. A 65-inch TV is about 143 cm wide — the 165 cm figure is diagonal.
Using 2.5 instead of 2.54 on precision drawings — the 1.6% error matters in manufacturing.
Confusing inches of length with inches of mercury (inHg) — a pressure unit, not length.

Frequently asked questions

How many centimeters in a inch?

One inch equals 2.54 centimeters.

How do I convert inches to centimeters?

Multiply the inch value by 2.54 to get the equivalent in centimeters.

What is 100 inches in centimeters?

100 inches equals 254 centimeters.

Is a inch bigger than a centimeter?

Yes. 1 inch equals 2.54 centimeters, so one inch is larger.

How to convert inches to centimeters without a calculator?

Multiply by 2.54 for a quick estimate; use a calculator for precise results.

Related length conversions

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