MM or CM to Fractions of Inches

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MM : = CM : = Inch :
Fill above blanks to convert MM, CM to inch in fractions.

Graduation of an inch: ",

How to use this tool

  • To conver MM to fractional inch, fill number into the blank MM
  • To conver CM to fractional inch, fill number into the blank CM
  • Use 1/8" graduations, 10cm = 4" ; Use 1/16" graduations, 10cm = 3 15/16" ;

Adjusting this virtual ruler to actual size

The diagonal screen is 15.6"(inches) of my laptop computer, resolution is 1366x768 pixels. I found a quick PPI reference from wiki, it shows 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 this online ruler in actual size, you can set the pixels per inch (PPI) according your own device.
Pixels per inch :

Welcom to try our online actual size ruler.

MM, CM, Inch

  • 1 centimeter(cm) = 10 millimeters(mm)
  • 1 meter = 100 centimeters = 1,000 millimeters
  • 1 inch equals 2.54 centimeters, 1 cm equals 0.393700787 in.

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.

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