Convert Inches to CM

Convert inches to centimetres, including fractional inches.

Direction

Value in inch (in)

Decimal places

12 in in centimetre

30.48 cm

Conversion factor

1 in = 2.54 cm

Reverse factor

1 cm = 0.39370079 in

Also written as

0 ft 12.0 in

cm = in × 2.54 — 12 × 2.54 = 30.48

Quick reference table.
in	cm
0.5	1.27
1	2.54
2	5.08
3	7.62
4	10.16
5	12.7
10	25.4
15	38.1
20	50.8
25	63.5
30	76.2
40	101.6
50	127
75	190.5
100	254
150	381
200	508
500	1,270
1000	2,540

What does Inches to CM Converter do?

Convert inches to centimetres exactly, accepting decimal inches, fractional inches such as 5 3/8, and feet-and-inches together. Ideal for converting American measurements into metric.

How to Use Inches to CM Converter

1
Enter a value in inchesDecimal or fractional.
2
Or use feet and inchesTwo fields for a height.
3
Read the centimetresWith millimetres shown too.

Key Features

Exact conversion: 1 inch = 2.54 cm
Accepts fractional input such as 5 3/8 or 7/16
Feet-and-inches composite entry
Millimetres shown alongside centimetres
Reference table from 1 to 100 inches

Frequently Asked Questions

How many cm is 1 inch?

Exactly 2.54 cm, by international definition since 1959. There is no rounding involved.

How do I convert feet and inches to cm?

Multiply the feet by 12, add the inches, then multiply by 2.54. 5 ft 9 in is 69 inches, which is 175.26 cm. The composite fields do this automatically.

Can I enter fractions?

Yes. Type 5 3/8 or 7/16 and it is parsed correctly. That matters because imperial measurements are almost always written as fractions rather than decimals.