Convert Inches

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

Inches are a measure of length. Inch is an imperial unit of measure, and can be abbreviated as in. For example 1 inch can be written as 1 in.

Inches can also be denoted using the ″ symbol, otherwise know as a double-prime. Often a double-quote (") is used instead of a double-prime for convenience. You could also write 1 in as 1″.

Inches are a standard unit of length that are most commonly used in the United States, but it's also used in Canada, the UK, and Japan. An inch is equal to ¹/₁₂ of a foot or ¹/₃₆ of a yard.

In addition to our conversion calculators below, our inch fraction calculator can help convert inches from decimal to an inch fraction and help solve inch fractions.

Inch Conversion Calculators

Choose a unit of length to convert to.

US Customary & Imperial Units

Convert inches to miles: 1 inch is equal to 1.5783E-5 miles
Convert inches to yards: 1 inch is equal to 0.027778 yards
Convert inches to feet and inches: 1 inch is equal to 0.083333 feet

SI Units

Convert inches to kilometers: 1 inch is equal to 2.54E-5 kilometers
Convert inches to meters: 1 inch is equal to 0.0254 meters
Convert inches to centimeters: 1 inch is equal to 2.54 centimeters
Convert inches to millimeters: 1 inch is equal to 25.4 millimeters
Convert inches to micrometers: 1 inch is equal to 25,400 micrometers
Convert inches to nanometers: 1 inch is equal to 25,400,000 nanometers

We have many more length conversion tools that you might also find useful.

Inches Measurement Conversion Table

Common inch values and equivalent imperial and metric length measurements
inches	miles	yards	feet	kilometers	meters	centimeters	millimeters	micrometers	nanometers
1"	0.000015783 mi	0.027778 yd	0.083333'	0.0000254 km	0.0254 m	2.54 cm	25.4 mm	25,400 µm	25,400,000 nm
2"	0.000031566 mi	0.055556 yd	0.166667'	0.0000508 km	0.0508 m	5.08 cm	50.8 mm	50,800 µm	50,800,000 nm
3"	0.000047348 mi	0.083333 yd	0.25'	0.0000762 km	0.0762 m	7.62 cm	76.2 mm	76,200 µm	76,200,000 nm
4"	0.000063131 mi	0.111111 yd	0.333333'	0.000102 km	0.1016 m	10.16 cm	101.6 mm	101,600 µm	101,600,000 nm
5"	0.000078914 mi	0.138889 yd	0.416667'	0.000127 km	0.127 m	12.7 cm	127 mm	127,000 µm	127,000,000 nm
6"	0.000094697 mi	0.166667 yd	0.5'	0.000152 km	0.1524 m	15.24 cm	152.4 mm	152,400 µm	152,400,000 nm
7"	0.00011 mi	0.194444 yd	0.583333'	0.000178 km	0.1778 m	17.78 cm	177.8 mm	177,800 µm	177,800,000 nm
8"	0.000126 mi	0.222222 yd	0.666667'	0.000203 km	0.2032 m	20.32 cm	203.2 mm	203,200 µm	203,200,000 nm
9"	0.000142 mi	0.25 yd	0.75'	0.000229 km	0.2286 m	22.86 cm	228.6 mm	228,600 µm	228,600,000 nm
10"	0.000158 mi	0.277778 yd	0.833333'	0.000254 km	0.254 m	25.4 cm	254 mm	254,000 µm	254,000,000 nm
11"	0.000174 mi	0.305556 yd	0.916667'	0.000279 km	0.2794 m	27.94 cm	279.4 mm	279,400 µm	279,400,000 nm
12"	0.000189 mi	0.333333 yd	1'	0.000305 km	0.3048 m	30.48 cm	304.8 mm	304,800 µm	304,800,000 nm
13"	0.000205 mi	0.361111 yd	1.083333'	0.00033 km	0.3302 m	33.02 cm	330.2 mm	330,200 µm	330,200,000 nm
14"	0.000221 mi	0.388889 yd	1.166667'	0.000356 km	0.3556 m	35.56 cm	355.6 mm	355,600 µm	355,600,000 nm
15"	0.000237 mi	0.416667 yd	1.25'	0.000381 km	0.381 m	38.1 cm	381 mm	381,000 µm	381,000,000 nm
16"	0.000253 mi	0.444444 yd	1.333333'	0.000406 km	0.4064 m	40.64 cm	406.4 mm	406,400 µm	406,400,000 nm
17"	0.000268 mi	0.472222 yd	1.416667'	0.000432 km	0.4318 m	43.18 cm	431.8 mm	431,800 µm	431,800,000 nm
18"	0.000284 mi	0.5 yd	1.5'	0.000457 km	0.4572 m	45.72 cm	457.2 mm	457,200 µm	457,200,000 nm
19"	0.0003 mi	0.527778 yd	1.583333'	0.000483 km	0.4826 m	48.26 cm	482.6 mm	482,600 µm	482,600,000 nm
20"	0.000316 mi	0.555556 yd	1.666667'	0.000508 km	0.508 m	50.8 cm	508 mm	508,000 µm	508,000,000 nm