Length

Convert Inch to Millimetre

Updated on: 24 May 2023

Convert Inch to Millimetre

Conversion of an inch to millimetre: Inch & millimetre are units of measurement of length and distance in the metric system. 1 inch (in) = 25.4 millimetres (mm). To convert inch to millimetres, multiply the given value in inches by 25.4. The resultant value will be the value in millimetres

Inches

Millimeters

What is an Inch?

Inch is a unit of measurement and is denoted as ‘in’ or simply by the symbol “. Some of the common uses include measuring the length of the screen of a smart TV screen, the height of a person, the size of a tyre and so on.

What is a Millimetre?

In the International System of Units (SI), a millimetre is a unit of length equal to one-thousandth of a metre. It is denoted as ‘mm’ in short.

Common usage:

Used to measure the size of the dial of a wristwatch
used to measure the size of a diamond
Used to measure the size of a coin

How to convert Inch to Millimetre?

To convert the inch to the millimetre, multiply the required inches by 25.4 to get the value in millimetres. As
1 in = 25.4 mm.

The formula to convert inch to millimetre is given below:
X in = X × 25.4 mm
where X is the value of inches.

Examples of Inch to Millimetre conversions

Problem 1: Convert 500 inches to millimetres.

Solution 1:

Step 1: The given inches is 500.
Step 2: To convert 500 inches to millimetres, substitute the given values at the required places in the formula. Hence,
Formula,
X in = X × 25.4 mm
500 in = 25.4 ×500 mm
= 12700 mm
Therefore, 500 inches is 12700 millimetres.

Problem 2: Convert 10 inches to millimetres.

Solution 2:

Step 1: The given inches is 10.
Step 2: To convert 10 inches to millimetres, substitute the values at the required places in the formula. Hence,
X in = X × 25.4 mm
10 in = 10×25.4 mm
= 254 mm
Therefore, 10 inches is 254 millimetres.

Problem 3: Convert 15 inches to millimetres.
Solution3 :

Step 1: The given inches is 15.
Step 2: To convert 15 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm
15 in = 15 × 25.4 mm
= 381 mm
Therefore, 15 inches is 381 mm.

Problem 4: Convert 20 inches to millimetres.
Solution 4:

Step 1: The given inches is 20.
Step 2: To convert 20 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm
20 in = 20 × 25.4 mm
= 508 mm
Therefore, 20 inches is 508 millimetres.

Problem 5: Convert 30 inches to millimetres.

Solution 5:

Step 1: The given inches is 30.
Step 2: To convert 30 inches to millimetres, substitute the values at the required places in the formula. Hence,

X in = X × 25.4 mm
30 in = 30 × 25.4 mm
= 762 mm
Therefore, 30 inches is 762 millimetres.

Inch (in) to Millimetre (mm)conversion table

Inch (in)	Millimetre (mm)	Conversion of Inch to Millimetre (in to mm)
1 in	25.4 mm	1 in is 25.4 mm
2 in	50.8 mm	2 in is 50.8 mm
3 in	76.2 mm	3 in is 76.2 mm
4 in	101.6 mm	4 in is 101.6 mm
5 in	127 mm	5 in is 127 mm
6 in	152.4 mm	6 in is 152.4 mm
7 in	177.8 mm	7 in is 177.8 mm
8 in	203.2 mm	8 in is 203.2 mm
9 in	228.6 mm	9 in is 228.6 mm
10 in	254 mm	10 in is 254 mm
11 in	279.4 mm	11 in is 279.4 mm
12 in	304.8 mm	12 in is 304.8 mm
13 in	330.2 mm	13 in is 330.2 mm
14 in	355.6 mm	14 in is 355.6 mm
15 in	381 mm	15 in is 381 mm
16 in	406.4 mm	16 in is 406.4 mm
17 in	431.8 mm	17 in is 431.8 mm
18 in	457.2 mm	18 in is 457.2 mm
19 in	482.6 mm	19 in is 482.6 mm
20 in	508 mm	20 in is 508 mm
21 in	533.4 mm	21 in is 533.4 mm
22 in	558.8 mm	22 in is 558.8 mm
23 in	584.2 mm	23 in is 584.2 mm
24 in	609.6 mm	24 in is 609.6 mm
25 in	635 mm	25 in is 635 mm
26 in	660.4 mm	26 in is 660.4 mm
27 in	685.8 mm	27 in is 685.8 mm
28 in	711.2 mm	28 in is 711.2 mm
29 in	736.6 mm	29 in is 736.6 mm
30 in	762 mm	30 in is 762 mm
50 in	1270 mm	50 in is 1270 mm
100 in	2540 mm	100 in is 2540 mm
200 in	5080 mm	200 in is 5080 mm
300 in	7620 mm	300 in is 7620 mm
400 in	10160 mm	400 in is 10160 mm
500 in	12700 mm	500 in is 12700 mm
600 in	15240 mm	600 in is 15240 mm
700 in	17780 mm	700 in is 17780 mm
800 in	20320 mm	800 in is 20320 mm
900 in	22860 mm	900 in is 22860 mm
1000 in	25400 mm	1000 in is 25400 mm

Difference between Inch (in) and Millimetre (mm)

Comparison Parameters	Inch (in)	Millimetre (mm)
Definition	A unit of measurement and is equal to 25.4 millimetres and 2.54 centimetres.	In the International System of Units (SI), a millimetre is a unit of length equal to one-thousandth of a metre.
The symbol	in	mm
Formula	1 inch = 25.4 millimetres	1mm = 0.001m
Use	is Used to measure the length of the screen of a smart T.V, the height of a person, etc.	Used to measure the length of tiny objects such as a peanut and the tip of a pencil, etc.

FAQs on the conversion of Inch to Millimetre

How do you convert inches to mm?
To convert the inch to the millimetre, multiply the required inches by 25.4 as
1 in = 25.4 mm.
Formula,
Y in = Y × 25.4

What is 1 inch equal to in mm?
1 in = 25.4 mm

What size are 2 inches in mm?
2 in = 50.8 mm

What is the metric conversion of 1 inch?
The metric conversion of 1 inch to the millimetre is,
1 inch = 25.4 millimetres

What does 25 in convert to in mm?
To convert the inch to the millimetre, multiply the required inches by 25.4 as
1 in = 25.4 mm.
Formula,
Y in = Y × 25.4
Hence 25 in is,
25 in = 25 × 25.4 mm
= 635 mm
Therefore, 25 inches is 635 mm.

Convert 100 inch to millimetre.
To convert 100 inch to millimetre, multiply the required inches by 25.4 as
1 in = 25.4 mm
Formula,
Y in = Y x 25.4
Hence, 100 in is,
100 in = 100 x 25.4 mm
= 2540 mm
Therefore, 100 inches is 2540 mm.

Convert 1000 inch to millimetres.
To convert 1000 inch to millimetre, multiply the required inches by 25.4 as
1 in = 25.4 mm
Formula,
Y in = Y x 25.4
Hence, 1000 in is,
100 in = 1000 x 25.4 mm
= 25400 mm
Therefore, 1000 inches is 25400 mm.

Convert 1/2 inch to mm.
To convert 1/2 inch to millimetre, multiply the required inches by 25.4 as
1 in = 25.4 mm
Formula,
Y in = Y x 25.4
Hence, 1/2 in is,
100 in = 1/2 x 25.4 mm
= 12.7 mm
Therefore, 1/2 inches is 12.7 mm.