Convert Centimetre to Inch

Quick answer: Centimetre to Inch

1 Centimetre = 0.3937008Inch (cm → in). To convert centimetre to inch, multiply by 0.3937008. To convert inch to centimetre, multiply by 2.54. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common centimetre-to-inch questions.

How to convert Centimetre to Inch

To convert centimetre to inch, multiply the number of centimetre by the conversion factor 0.3937008, because 1 cm = 0.3937008in. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 in = 2.54cm, so you divide by 0.3937008 (or multiply by 2.54) to turn inch back into centimetre.

in = cm × 0.3937008  ·  cm = in × 2.54

1. Write down the value you want to convert, in centimetre.
2. Multiply it by 0.3937008.
3. The result is the same area/length/quantity expressed in inch.

Centimetre to Inch — worked examples

Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5centimetre is 1.968504inch because 5 cm × 0.3937008 = 1.968504 in.

Common Centimetre to Inch conversions

These are the centimetre-to-inch values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:

• 1 centimetre = 0.3937008 inch
• 2 centimetre = 0.7874016 inch
• 2.5 centimetre = 0.984252 inch
• 3 centimetre = 1.181102 inch
• 4 centimetre = 1.574803 inch
• 5 centimetre = 1.968504 inch
• 6 centimetre = 2.362205 inch
• 7 centimetre = 2.755906 inch
• 8 centimetre = 3.149606 inch
• 9 centimetre = 3.543307 inch
• 10 centimetre = 3.937008 inch
• 12 centimetre = 4.724409 inch
• 15 centimetre = 5.905512 inch
• 20 centimetre = 7.874016 inch
• 25 centimetre = 9.84252 inch
• 30 centimetre = 11.81102 inch
• 50 centimetre = 19.68504 inch
• 75 centimetre = 29.52756 inch
• 100 centimetre = 39.37008 inch
• 200 centimetre = 78.74016 inch
• 500 centimetre = 196.8504 inch
• 1000 centimetre = 393.7008 inch

Centimetre to Inch conversion chart (both directions)

The chart below converts centimetre to inch and inch to centimetre side by side, so it works whichever way you need. 1 centimetre = 0.3937008inch, and 1 inch = 2.54centimetre.

Centimetre vs Inch: which is bigger?

A inch is the larger unit: one inch equals 2.54 centimetres. Put another way, you need 2.54 centimetres to make a single inch.

What is a Centimetre? History, origin and usage

The centimetre is one-hundredth of a metre, from the Latin centum, 'hundred'. It became prominent as the base length of the centimetre-gram-second (CGS) system used by many 19th- and early-20th-century physicists.

The centimetre is the everyday metric unit for small measurements such as human height, clothing sizes, paper and rulers across most of the world. It sits conveniently between the millimetre and the metre.

For decades scientists worked in the centimetre-gram-second system before the metre-kilogram-second system prevailed. A standard school ruler is typically 30 cm long.

What is a Inch? History, origin and usage

The inch takes its name from the Latin uncia, 'a twelfth part', because it was one-twelfth of a Roman foot, the same root that gave English the word 'ounce'. It was also understood as the width of a man's thumb, and one medieval English rule averaged the thumb-breadths of three different men.

The inch is used in the US, UK and Canada for screen sizes, paper, body measurements and countless engineering contexts. Since 1959 it is defined as exactly 2.54 centimetres.

An old English statute defined the inch as three barleycorns laid end to end, a standard that even shaped shoe sizing. Screen, tyre and wheel sizes are still quoted in inches almost everywhere in the world.

Convert 1 Centimetre to other units

It can help to see a centimetre next to the other units it is commonly compared with. One centimetre (cm) is equal to:

Convert 1 Inch to other units

One inch (in) is equal to:

Tips for converting Centimetre to Inch

• To go from centimetre to inch, multiply by 0.3937008; to go back, divide by 0.3937008 (or multiply by 2.54).
• For a quick mental estimate, remember that 1 centimetre ≈ 0.3937008 inch, so 10 centimetre ≈ 3.937008 inch.
• The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
• Both fields update live as you type — change either side to convert in that direction.

How to use this Centimetre to Inch converter

Type a number into the Centimetre field and the equivalent in Inch appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Inch field to convert the other way (inch to centimetre). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.

Accuracy and method

Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 cm = 0.3937008in), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for centimetre-to-inch conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.

The metric units (km, m, cm, mm, µm) are exact by definition, and the imperial units (mile, yard, foot, inch, nautical mile) use their exact international values. Traditional units (hand, span, finger, cubit, rod/pole, link, rope, ken, league) are given at their commonly accepted standard sizes — historical local values sometimes differed, so confirm against a primary source before relying on them for legal or historical work.

Frequently asked questions

How many inch are in 1 centimetre?

1 centimetre = 0.3937008 inch (in). To convert any number of centimetre to inch, multiply by 0.3937008.

How do I convert centimetre to inch?

Multiply the number of centimetre by 0.3937008. For example, 10 centimetre = 10 × 0.3937008 = 3.937008 inch, and 25 centimetre = 9.84252 inch.

How many centimetre are in 1 inch?

1 inch = 2.54 centimetre. So to convert inch back to centimetre, multiply by 2.54.

What is the formula to convert centimetre to inch?

inch = centimetre × 0.3937008. The reverse formula is centimetre = inch × 2.54.

How much is 100 centimetre in inch?

100 centimetre = 39.37008 inch. (And 1000 centimetre = 393.7008 inch.)

Which is bigger, a centimetre or a inch?

A inch is larger: 1 inch = 2.54 centimetre.

Is this centimetre to inch converter accurate?

Yes — every value is computed from the exact 0.3937008 in per cm factor (not rounded look-up tables), and the factors are re-verified automatically on every update.

Can I convert inch to centimetre too?

Yes. The converter works both ways — enter a value in either field. 1 inch = 2.54 centimetre.

Related length conversions

• Inch to Centimetre
• Finger to Centimetre
• Hand to Inch
• Centimetre to Kilometre
• Metre to Inch
• Astronomical Unit to Centimetre
• Pole to Centimetre
• Inch to Foot
• Rope to Centimetre
• Point to Inch

See all length conversions →