How many meters is 1 inch?

One inch equals exactly 0.0254 meters (2.54 cm / 25.4 mm). This is exact by definition, not an approximation.

How do I convert inches to meters?

Multiply inches by 0.0254. For example, 72 inches = 72 x 0.0254 = 1.8288 m.

Why is 1 inch exactly 25.4 mm?

In 1959, English-speaking nations agreed to define the inch as exactly 25.4 mm to harmonize the imperial and metric systems. Before that, the inch varied slightly between countries. The 25.4 mm definition ended centuries of inconsistency.

Inches to Meters (in to m) Converter

1 in = 0.0254 m

1 Inch equals 0.0254 Meters (1 in = 0.0254 m). Convert Inches to Meters with formula, table, and examples.

One inch equals exactly 0.0254 meters. This is one of the most important imperial-to-metric conversions, used daily in international trade, engineering, and manufacturing. The 25.4 mm definition of the inch (adopted in 1959) makes this conversion exact, with no rounding.

How to Convert Inches to Meters

m = in × 0.0254

Multiply the value in Inches by 0.0254

Take your value in Inches
Multiply by 0.0254
Read the result in Meters

Common Inches to Meters Conversions

Inches (in)	Meters (m)	Status
0.5 in	0.0127 m
1 in	0.0254 m
2 in	0.0508 m
5 in	0.127 m
10 in	0.254 m
12 in	0.3048 m
24 in	0.6096 m
36 in	0.9144 m
39.37 in	1 m
48 in	1.2192 m
72 in	1.8288 m
100 in	2.54 m
200 in	5.08 m
500 in	12.7 m
1,000 in	25.4 m

Good to Know About Inches to Meters Conversion

The 1959 international yard and pound agreement defined 1 inch as exactly 25.4 mm. This single definition unified American, British, Canadian, Australian, New Zealand, and South African inches into one standard. Before 1959, an American inch and a British inch were slightly different lengths.

Inches to Meters: What You Need to Know

A 12-inch ruler is 0.3048 m. A 72-inch person (6 feet) is 1.8288 m. A 55-inch TV is 1.397 m diagonal. Every American product sold internationally needs its inch dimensions converted to meters for metric markets. This conversion happens billions of times per year in global commerce.

What is a Inch? in

An imperial unit of length equal to exactly 2.54 centimeters. Commonly used in the US and UK for screen sizes, body measurements, and construction.

Imperial Us-customary screen sizes construction (US) body measurements

Learn more about Inch →

What is a Meter? m

The base unit of length in the International System of Units (SI). Used worldwide as the standard measure of distance.

Metric construction athletics navigation

Learn more about Meter →

Going the other way? Use our Meters to Inches converter.

Inches to Meters FAQ

One inch equals exactly 0.0254 meters (2.54 cm / 25.4 mm). This is exact by definition, not an approximation.
Multiply inches by 0.0254. For example, 72 inches = 72 x 0.0254 = 1.8288 m.
In 1959, English-speaking nations agreed to define the inch as exactly 25.4 mm to harmonize the imperial and metric systems. Before that, the inch varied slightly between countries. The 25.4 mm definition ended centuries of inconsistency.

Non-Frequently Asked Questions About Inches to Meters

Questions nobody should ask - but someone did.

In 1999, Lockheed Martin sent thruster data in pound-force seconds (imperial) while NASA expected newton-seconds (metric). The spacecraft missed its orbit by 150 km and burned up. Cost: $327 million. The most expensive inch-to-meter conversion error in history.