Inch, CM, MM Converter

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MM : = CM : = Inch : = Fraction :
Fill MM, CM, decimal inch or fraction to convert

Graduation of an inch: ",

How to use this tool

Adjusting this online 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 to have the online ruler in actual size, set the pixels per inch (PPI) according your own device.
Pixels per inch :

MM, CM, Inch

Inch To CM,MM Table


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.

How big is a centimeter

A centimeter is 10 millimeters, or approximately the width of a fingernail. Another way to imagine the size of a centimeter is in relation to inches. One centimeter is approximately three times smaller than an inch.

Online Virtual Rulers

Length Converters

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The dynamic ruler is developed by , all rights reserved.
The result of the operation may not be applicable to all situations, use at your own risk.

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