How do I convert Inches to Centimetres?

To convert Inches (in) to Centimetres (cm), use the formula: 1 in = 2.54 cm. For example, 1 in equals 2.54 cm.

How many cm are in one in?

There are 2.54 centimetres in one inches (1 in = 2.54 cm).

What is the conversion formula for in to cm?

The exact conversion formula is: 1 in = 2.54 cm. This converter uses this formula to give you an accurate result for any value you enter.

How many centimetres is 6 inches?

6 inches is 15.24 cm, because 6 × 2.54 = 15.24. The same maths applies to any value — multiply the inches by 2.54.

How do I convert centimetres back to inches?

Divide the centimetres by 2.54. For example, 30 cm ÷ 2.54 ≈ 11.81 inches. Typing in the centimetres field does this automatically.

Is the inch-to-centimetre factor exact?

Yes. Since 1959 the inch has been defined as exactly 2.54 centimetres, so the conversion is exact rather than approximate.

Is anything uploaded?

No. The conversion runs entirely in your browser as you type, and no values are sent to any server.

Inches to Centimetres Converter

This free length converter changes inches (in) into centimetres (cm) and back again. It is handy for reading US measurements in metric units — screen sizes, clothing, height, paper sizes and craft dimensions.

How it works

The inch has been defined as exactly 2.54 centimetres since 1959, so the conversion is a single exact multiplication:

centimetres = inches × 2.54

The converter is bidirectional: type in the inches field to multiply by 2.54, or type in the centimetres field to divide by 2.54 and get inches. Both update in real time.

Example

To convert 10 inches: 10 × 2.54 = 25.4 cm. To go the other way, 50 cm ÷ 2.54 ≈ 19.69 in.

Inches (in)	Centimetres (cm)
1 in	2.54 cm
5 in	12.7 cm
10 in	25.4 cm
100 in	254 cm

All calculations run entirely in your browser with no data sent to any server.