18 inches to centimeters

Q: How many centimeters is 18 inches?

18 inches is 45.72 centimeters.

18 inches = 45.72 centimeters

Rounded to a practical precision: 45.7 cm.

inches

centimeters

How the calculation works

One inch is 2.54 centimeters, so:

18 in × 2.54 = 45.72 cm

Reversing it, 45.72 centimeters ÷ 2.54 returns 18 inches.

Nearby values

Inches	Centimeters
14 in	35.56 cm
15 in	38.1 cm
16 in	40.64 cm
17 in	43.18 cm
18 in	45.72 cm
19 in	48.26 cm
20 in	50.8 cm
21 in	53.34 cm
22 in	55.88 cm

About these units

Inch (in) — An inch is exactly 25.4 millimetres and is used for screen sizes, pipe diameters and paper dimensions.

Centimeter (cm) — A centimetre is one hundredth of a metre, the everyday metric unit for body measurements and small objects.

Frequently asked questions

How many centimeters is 18 inches?

18 inches is 45.72 centimeters.

How do I convert inches to centimeters myself?

Multiply by 2.54. To go back, divide by 2.54 — or multiply by 0.393701.

Is this figure exact?

The conversion factor between the inch and the centimeter is fixed by definition. The figure above is rounded for readability; the converter carries full precision.

Convert other values

Full inches to centimeters converter · All length converters