Convert Inch to Meter (in → m)

The inch is the global standard for screen sizes, pipe diameters, and shoe sizing in Anglo-Saxon countries.

Inch

Meter

0.0254

1 in0.0254 mNIST · BIPM accuracy

Inch to Meter Conversion Table

10 common values

Inch	Meter
1 in	0.0254 m
5 in	0.127 m
10 in	0.254 m
25 in	0.635 m
50 in	1.27 m
100 in	2.54 m
250 in	6.35 m
500 in	12.7 m
1,000 in	25.4 m
5,000 in	127 m

How to Convert Inch to Meter Manually

Step by Step

Converting inches to meters is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1
Take your value in inches
Start with the number of inches (in) you want to convert.
2
Multiply by 0.0254
The conversion factor from in to m is 0.0254. Multiply your value by this number.
3
Read the result in meters
The result is your value in meters (m).

Practical Examples

1 in

equals

0.0254 m

5 in

equals

0.127 m

10 in

equals

0.254 m

25 in

equals

0.635 m

100 in

equals

2.54 m

Formula

Multiply the value in inches by 0.0254. For the reverse direction, multiply by 39.370079.

Forwardm = in × 0.0254

Reversein = m × 39.370079

Example: 10 in × 0.0254 = 0.254 m

Tips

Use these in everyday conversions

1 inch = 2.54 cm exactly by international agreement — no rounding.
Screen sizes are always diagonal, never width. A 27-inch monitor is about 60 cm wide.
To convert cm to inches mentally, divide by 2.5 and subtract 1.6%.

Common Mistakes

Avoid these

Reading a screen size as width. A 65-inch TV is about 143 cm wide — the 165 cm figure is diagonal.
Using 2.5 instead of 2.54 on precision drawings — the 1.6% error matters in manufacturing.
Confusing inches of length with inches of mercury (inHg) — a pressure unit, not length.

About Inch and Meter

What is the Inch?

The inch equals exactly 25.4 millimeters under the 1959 international yard and pound agreement. The word derives from the Old English 'ynce,' from Latin 'uncia' meaning one twelfth (the inch is one twelfth of a foot). Originally based on the width of a thumb, the inch has been standardized for centuries. It is the global standard for screen sizes (a 15-inch laptop or 65-inch TV), pipe and tubing diameters (1-inch plumbing, 2-inch exhaust), and shoe sizes in Anglo-Saxon countries. Construction lumber, photographic prints, paper sizes (US Letter is 8.5 × 11 in), and rainfall in the US all use inches. The inch relates to the millimeter (25.4 mm = 1 in exactly), the foot (12 in = 1 ft), and the yard (36 in = 1 yd). Subdivisions in fractions (½, ¼, ⅛) remain common in carpentry.

Screen and monitor diagonals worldwide (phone, tablet, TV)
US and UK shoe sizes
Industrial pipe and fitting diameters

Real-world examples

A 65-inch TV has a 165 cm diagonal. A smartphone screen is typically 6–7 inches. Standard copper plumbing in the UK is ½ inch or ¾ inch.

What is the Meter?

The meter is the base SI unit of length. Originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole through Paris, it has been redefined several times for greater precision. Since 1983, the meter has been defined by the speed of light: the distance light travels in vacuum during 1/299,792,458 of a second. This definition links the meter to a fundamental physical constant, making it reproducible anywhere in the universe. The meter is the parent unit for all metric lengths — kilometers, centimeters, millimeters — and is used globally in science, engineering, construction, and sports. A standard door is about 2 meters tall, and the average adult walking pace covers roughly 1 meter per step.