ArchSupply Utilities

Centimeter to Inch Converter

Instant, two-way conversion across common engineering units.

Free

1 cm = 0.39370079 in(Centimetre → Inch)

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Converting centimeters to inches

To convert centimeters to inches, multiply the value by 0.39370079. Length values feed directly into setting out, spans and drawing dimensions, so the converter keeps full decimal precision in both directions.

Visual scale

To scale
1 centimeter = 0.39370079 inches.
1 inch = 2.54 centimeters.

Centimeter (cm)

The centimeter (cm) is one hundredth of a meter, a convenient everyday scale between millimeters and meters.

Origin
A decimal subdivision of the meter defined with the original metric system.
Where it is used
Used for furniture, interior dimensions, product sizes and general everyday measurement rather than construction drawings.
Relation to SI
1 cm = 0.01 m exactly.

Inch (in)

The inch (in) is the base small unit of the imperial and US customary length system.

Origin
Historically derived from thumb and barleycorn measures, it has been defined internationally since 1959 as exactly 25.4 mm.
Where it is used
Standard on US and UK drawings, pipe and fastener sizes, screen dimensions and imported product data.
Relation to SI
1 in = 0.0254 m exactly, by international agreement.

Frequently asked questions

How many inches are in one centimeter?

1 cm equals 0.39370079 in.

How do I convert centimeters to inches?

Multiply the value by 0.39370079. For example, 10 cm equals 3.9370079 in.

How do I convert back from inches to centimeters?

1 in equals 2.54 cm. The converter above works in both directions, so you can type into either field.

Should I work in millimeters or meters on drawings?

Most architectural and structural drawings outside the US are dimensioned in millimeters to avoid decimal points, while site levels, grids and areas are stated in meters.

Are the imperial values here exact?

Yes. The inch has been defined as exactly 25.4 mm since 1959, so foot, yard and mile conversions are exact rather than rounded.

Is this length converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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