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Unit converter

Inches to cm Converter

Convert inches to centimetres: 1 inch = 2.54 cm exactly. Table from 1 to 100 inches, for screens, waist sizes and paper.

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Quick answer

cm = inches × 2.54, exactly. 1 in = 2.54 cm, 12 in = 30.48 cm, 32 in = 81.28 cm and a 55-inch TV diagonal is 139.7 cm.

Result
2.54 cm
Conversion
1 in = 2.54 cm
1 in in every length unit (10 rows)
UnitValue
Millimetres25.4 mm
Centimetres2.54 cm
Metres0.0254 m
Kilometres0.0000254 km
Inches1 in
Feet0.0833333 ft
Yards0.0277778 yd
Miles0.0000157828 mi
Nautical miles0.0000137149 nmi
Micrometres25,400 µm

Length: inches to centimetres

InchesCentimetres
0.5 in1.27 cm
1 in2.54 cm
2 in5.08 cm
3 in7.62 cm
4 in10.16 cm
5 in12.7 cm
6 in15.24 cm
8 in20.32 cm
10 in25.4 cm
12 in30.48 cm
15 in38.1 cm
18 in45.72 cm
24 in60.96 cm
28 in71.12 cm
30 in76.2 cm
32 in81.28 cm
34 in86.36 cm
36 in91.44 cm
40 in101.6 cm
43 in109.22 cm
50 in127 cm
55 in139.7 cm
65 in165.1 cm
100 in254 cm

How the conversion works

Since 1959 the inch has been defined as exactly 25.4 mm, so this conversion has no rounding error at all: 2.54 is exact.

Screen sizes measure the diagonal: a 55-inch television is 139.7 cm corner to corner, not wide.

For any other pair, use the full unit converter.

Frequently asked questions

How many cm is 1 inch?

2.54 cm exactly.

What is 32 inches in cm?

81.28 cm.

How big is a 55-inch TV in cm?

139.7 cm diagonally.

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