How to convert 1 inch to cm?

One inch is exactly equal to 2.54 centimeters.

How many centimeters in 12 inches?

12 inches multiplied by 2.54 equals exactly 30.48 centimeters.

What is 36 inches in cm?

36 inches is equal to exactly 91.44 centimeters (which is also 1 yard).

Inches to CM Converter

Convert length from inches (in) to centimeters (cm) instantly

Formula: centimeters = inches × 2.54

Inches (in)

Centimeters (cm)

Quick Conversions

1 in = 2.54 cm

2 in = 5.08 cm

5 in = 12.7 cm

10 in = 25.4 cm

12 in = 30.48 cm

24 in = 60.96 cm

36 in = 91.44 cm

48 in = 121.92 cm

Inches to CM Conversion Table

Inches (in)	Centimeters (cm)	Common Use
1	2.54	Small objects
2	5.08	Small items
6	15.24	Ruler length
12	30.48	1 foot
18	45.72	1.5 feet
24	60.96	2 feet
36	91.44	1 yard
48	121.92	4 feet
60	152.40	5 feet
72	182.88	6 feet

How to Convert Inches to Centimeters

Converting inches to centimeters is essential for precise international projects, especially when dealing with US-based specifications in a metric-dominant world. The relationship between the two units is fixed by international agreement.

The Formula

To convert from inches (in) to centimeters (cm), use the following formula:

Centimeters = Inches × 2.54

Common Reference Points

Having a few mental benchmarks can help you double-check your calculations:

1 inch: Exactly 2.54 cm.
1 foot (12 inches): Exactly 30.48 cm.
1 yard (36 inches): Exactly 91.44 cm.

Why 2.54?

In 1959, the United States and countries of the Commonwealth of Nations agreed on a standard definition for the inch, setting it at exactly 25.4 millimeters (2.54 cm). Before this, there were slight variations between the US and UK inches!