MM or CM to Fractions of Inches

This is an online length converter, convert millimeters(mm) to inches, centimeters(cm) to inches, inches to cm, inches to mm, include fraction and decimal inches, with a ruler to show the corresponding of units, understand your question with the best visualization.

How to use this tool

To convert MM to fractional inch, fill number into the blank MM, e.g. 16 mm ≈ 5/8 inch
To convert CM to fractional inch, fill number into the blank CM, e.g. 8 cm ≈ 3 1/8", use smaller scale(1/32"), 8 cm ≈ 3 5/32"
Use 1/8" graduations, 10cm ≈ 4" ; Use 1/16" graduations, 10cm = 3 15/16" ;
To convert fractional inch to mm or cm, fill fraction into the blank Fractional inch, e.g. 2 1/2" = 2.5"
To convert decimal inch to fractional inch, fill decimal inch into the blank Decimal inch. e.g. 3.25" = 3 1/4"

Adjusting this virtual ruler to actual size

The diagonal screen is 15.6"(inches) of my laptop computer, resolution is 1366x768 pixels. I google the PPI reference and found 100 PPI to my screen, after i measure the size of virtual ruler by a actual ruler, i found the markings are not very accurate at 30cm, so i set the default pixels per inch(PPI) is 100.7 for myself.

If you would like measure the length of something, we have an online actual size ruler, welcom to try it.

MM, CM & Inch

1 centimeter(cm) = 10 millimeters(mm). (convert cm to mm)
1 meter = 100 centimeters = 1,000 millimeters. (convert meter to cm)
1 inch equals 2.54 centimeters(cm), 1 cm approximately equivalent to 3/8 inch or equals 0.393700787 inch

Fractional inches to cm & mm conversion table

Inches	CM	MM
1/2"	1.27	12.7
1/4"	0.64	6.4
3/4"	1.91	19
1/8"	0.32	3.2
3/8"	0.95	9.5
5/8"	1.59	15.9
7/8"	2.22	22.2
1/16"	0.16	1.6
3/16"	0.48	4.8
5/16"	0.79	7.9
7/16"	1.11	11.1

Inches	CM	MM
9/16"	1.43	14.3
11/16"	1.75	17.5
13/16"	2.06	20.6
15/16"	2.38	23.8
1/32"	0.08	0.8
3/32"	0.24	2.4
5/32"	0.4	4
7/32"	0.56	5.6
9/32"	0.71	7.1
11/32"	0.87	8.7
13/32"	1.03	10.3

Inches	CM	MM
15/32"	1.19	11.9
17/32"	1.35	13.5
19/32"	1.51	15.1
21/32"	1.67	16.7
23/32"	1.83	18.3
25/32"	1.98	19.8
27/32"	2.14	21.4
29/32"	2.3	23
31/32"	2.46	24.6

Fractional Ruler

There are two types of scales commonly used on rulers; Fractional and Decimal. Fractional Rulers have graduations or marks based on fractions, for example 1/2", 1/4" 1/8", 1/16", etc.. Decimal Rulers have graduations or marks which are based on the decimal system such as 0.5, 0.25, 0.1, 0.05, etc.. Most Fractional Rulers are based on the English measuring system where scales are graduated in units of one inch and fractions of an inch.

Fraction To Decimal

If you would like convert fraction to decimal, or convert decimal to fracion, try this fraction/decimal converter

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MM, CM to inches conversion table

MM	CM	Approximate Fractional Inches	Decimal Inches
1 mm	0.1 cm	1/25 Inch	0.03937 Inches
2 mm	0.2 cm	1/16 Inch	0.07874 Inches
3 mm	0.3 cm	3/32 Inch	0.11811 Inches
4 mm	0.4 cm	1/8 Inch	0.15748 Inches
5 mm	0.5 cm	3/16 Inch	0.19685 Inches
6 mm	0.6 cm	Just short of 1/4 Inch	0.23622 Inches
7 mm	0.7 cm	Little over 1/4 Inch	0.27559 Inches
8 mm	0.8 cm	5/16 Inch	0.31496 Inches
9 mm	0.9 cm	Just short of 3/8 Inch	0.35433 Inches
10 mm	1.0 cm	Little over 3/8 Inch	0.39370 Inches
11 mm	1.1 cm	7/16 Inch	0.43307 Inches
12 mm	1.2 cm	Just short of 1/2 Inch	0.47244 Inches
13 mm	1.3 cm	Little over 1/2 Inch	0.51181 Inches
14 mm	1.4 cm	9/16 Inch	0.55118 Inches
15 mm	1.5 cm	Just short of 5/8 Inch	0.59055 Inches
16 mm	1.6 cm	5/8 Inch	0.62992 Inches
17 mm	1.7 cm	Just short of 11/16 Inch	0.66929 Inches
18 mm	1.8 cm	Just short of 3/4 Inch	0.70866 Inches
19 mm	1.9 cm	Little under 3/4 Inch	0.74803 Inches
20 mm	2.0 cm	Just short of 13/16 Inch	0.78740 Inches
21 mm	2.1 cm	Little over 13/16 Inch	0.82677 Inches
22 mm	2.2 cm	Just short of 7/8 Inch	0.86614 Inches
23 mm	2.3 cm	Little over 7/8 Inch	0.90551 Inches
24 mm	2.4 cm	15/16 Inch	0.94488 Inches
25 mm	2.5 cm	1 Inch	0.98425 Inches

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