Inches to mm

inches to mm is our website about converting the imperial or United States customary unit of length inch into the decimal unit of length millimeter.

Here we have all about inches to millimeters you ever wanted to know, including the formula, examples and our inch to mm converter.

If you have been asking yourself how many mm in an inch, then you have come to the right website, too. 🙂

The abbreviation for inches is in, and the symbol for inch is “, a double prime.

In turn, the abbreviation for millimeter is mm.

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How to Convert Inches to MM?

To change inch to mm you have to multiply the amount of inches by 25.4.

The inches to mm formula is [mm] = [in] x 25.4.

In short:
1 inch = 25.4 mm

1 in = 25.4 mm

1″ = 25.4 mm

Here is an example of how to convert inches to mm:

Assumed you have seven inches and want to convert them into millimetres.

Multiply 7 by 25.4 to get 177.8.

This is the corresponding height or length in millimeter.

As you can see the inch to mm conversion is pretty easy.

Yet, using our inches to mm calculator below things are even easier.

Frequently Asked Questions

How many mm is 1/4 inch?

1/4 inch = 6.35 millimeters

What size is 1 inch in mm?

1 inch is 25.4 millimeters

How many mm is 1/2 inch?

1/2 inch = 12.7 millimeters

How many inches is a millimeter?

1 mm =0.0393700787 in

What is the 1/2 inch on a ruler?

The 1/2 inch mark is the second longest line between 0 and 1 inch

Additional Information

We have created this website to help Americans and other people not familiar with the SI units of length to convert inches to millimeter easily and accurately.

1 mm equals one thousandth of a meter, which is the International System of Units base unit of length.

Millimeter is the American spelling, whereas the international spelling would be “millimetre”.

In any case, the millimeter is always abbreviated as mm, lower case.

Below you can find the equivalences of one inch in other decimal or metrical units:
  • 1″ = 2.54 m centimeter
  • 1″ = 0.254 m decimeter
  • 1″ = 0.0254 meter
  • 1″ = 0.0000254 kilometer
As opposed to the decimal system of length, in one foot (the singular form of feet) there are dozen inches.

And one yard comprises of 3 feet.

These are the most important things to know about inches and mm.

No matter if you need to transform dimensions of screws and tube fittings, or if you are working on electronic devices that have shipped over an ocean you now know the other unit’s length or height equivalence.

Our frequent conversions in this category include, for example:On our page about mm to inches you not only find a converter and useful information, but we have also added some more details on feet and inches.

Summary

As an image is worth a thousand words we sum this article up as follows:

Here you can convert inches to feet and vice versa.

If you drop us a comment using the form below or send us an email we will get back to you as soon as possible.More information:– Article written by Mark, last updated on March 13th, 2024