Metric to Inches Calculator
In the handy metric to inches calculator, we convert mm to inches and the following metric units:
 centimeter,
 meter,
 kilometer.
We will also show how to use our metric to inches calculator, so you won't ever get lost again with the imperial system.
What is the metric system? Meter definition
The metric measurement system is a worldwide accepted way of defining the distance between two points. It is based on the meter. Some of them are:
 picometers (pm)
 nanometers (nm)
 micrometers (μm)
 millimeter (mm)
 centimeters (cm)
 decimeters (dm)
 meters (m)
 kilometers (km)
But, what is the meter? The meter definition considers it to be 1/299,792,458 of the distance that light travels in a vacuum space in one second.
However, it is not the only way of measuring distance. The imperial measurement system also exists, which rules in US and UK. One of their most relevant units is the inch.
How to convert metric values to inches?
Relevant organizations have changed the inch definition through history; however, the current one is:
$\footnotesize \rm {1 \ inch = 25.4 \ mm}$, which, if we want to express it in centimeters:
$\footnotesize \rm {1 \ inch = 2.54 \ cm}$.
Also, if we use our metric to inches calculator, we will discover that:
$\footnotesize \rm {1 \ m = 39.37 \ inch}$,
$\footnotesize \rm {1 \ km = 39,370 \ inch }$
How to use our metric to inches calculator?
Our metric to inches calculator is pretty easy to use.
 Type the value in the metric unit of your preference. Our tool will indicate the inch value.
 Also, you can start typing the inch value. Metric values magically will appear.
Lets see some examples:

Convert in to mm:
$\footnotesize \rm {1/4 \ inch = 0.25 \ in}$
$\footnotesize \rm {0.25 \ in * 25.4 \ mm / in = 6.35 \ mm}$ 
Convert 10 mm to inches:
$\footnotesize \rm {10 \ mm / 25.4 \ mm \ per \ inch = 0.3937 \ inches}$
Note that when we want to convert mm to inches, we divide by 25.4. Contrarily, the other way around requires a multiplication per 25.4. You can use the conversion list in the section above or forget about it and use our metric to inches calculator.
Other distancerelated calculators
Besides of our metric to inches calculator, here we want to mention other distance related calculators you could find useful:
 Length converter
 Distance converter
 Height converter
 Feet and inches calculator
 Inch converter
 Millimeter calculator
 mm calculator
 cm to m calculator
 cm to in converter
 Feet to miles converter
 ft to m converter
 Inch to meter calculator
 in to cm converter
 Meters to feet converter
 m to ft converter
 Centimeter calculator
 Kilometer calculator
FAQ
How many mm are in an inch?
25.4 mm. You can check our metric to inches calculator and seek for inch definition. Also, you can calculate as follows:
 Remember that 1 inch is 2.54 cm.
 Convert 2.54 cm to millimeters by multiplying that value by 10. Therefore, 1 inch is 25.4 mm.
How much it is 10 mm to inches?
0.3937. Let's see how to calculate it.
 Remember how many mm are in 1 inch? Yes, 25.4. There are 25.4 mm in an inch. Therefore, we divide 10 mm by 25.4 mm.
 The result is the amount in inches we are looking for.