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Convert mm to inches
Interactive millimeters to inches conversion tool
The mm to inches converter below can be used to quickly and easily convert millimeters to inches. Simply enter the number of millimeters you want to convert and the calculator will output the corresponding value in inches.
What is the conversion factor between millimeters and inches?
A conversion factor is used to change the units of a measured quantity without changing its value. It represents the ratio (or fraction) that expresses the relationship between two different units. A conversion factor is always equal to 1.
The relationship between millimeters and inches is 25.4, such as:
Following the formula above, we can see that there are 25.4 millimeters for every inch, and for every millimeter, there are 125.4 inches (0.0393701 in).
To convert from millimeters to inches, we turn our formula into a conversion factor that is equal to 1.
Both these fractions are equal to 1. The numerator and the denominator are equivalent, they are just expressed in different units.
Because we are converting from millimeter to inch, we will use the first fraction: 1 in25.4 mm so that millimeters are canceled out. We then multiply the value in millimeters by this fraction to get the result in inches (see example).
Note that mm is in the denominator (bottom) of the conversion factor. This is important, you always want to have the unit you are converting from at the bottom and the unit you are converting to in the numerator (top).
You will find below how to use this ratio to convert from mm to in. Just remember for now that the conversion factor for converting from millimeters to inches is:
Which is bigger, a millimeter or an inch?
When it comes to measurements, there can be some confusion over which is bigger, a millimeter or an inch. To find out which one is larger, we must first convert one unit to the other and then compare them.
- 1 mm = 125.4 in = 0.03937007874 in
- 0.0393701 inch is smaller than 1 inch.
- 1 millimeter is, therefore, smaller than 1 inch.
- To be more specific, an inch is 25.4 times bigger than a millimeter.
millimeters to inches conversion table
| millimeters | inches | millimeters | inches |
|---|---|---|---|
| 1 mm | 0.0393701 in | 11 mm | 0.433071 in |
| 2 mm | 0.0787402 in | 12 mm | 0.472441 in |
| 3 mm | 0.11811 in | 13 mm | 0.511811 in |
| 4 mm | 0.15748 in | 14 mm | 0.551181 in |
| 5 mm | 0.19685 in | 15 mm | 0.590551 in |
| 6 mm | 0.23622 in | 16 mm | 0.629921 in |
| 7 mm | 0.275591 in | 17 mm | 0.669291 in |
| 8 mm | 0.314961 in | 18 mm | 0.708661 in |
| 9 mm | 0.354331 in | 19 mm | 0.748031 in |
| 10 mm | 0.393701 in | 20 mm | 0.787402 in |
How to convert millimeters to inches?
Multiplying any value by 1 will get you the same value back. You can do that one time or multiple times.
For example:
- 39 x 1 = 39
- 981 x 1 x 1 x 1 = 981
Multiplying by 1 is the first step in any unit conversion problem. The second step is to replace the number 1 with the conversion factor that is also equal to 1.
For example, if we want to convert 2.54 millimeters into inches we multiply 2.54 mm by the conversion factor of 1 in25.4 mm
By replacing the number 1 with the conversion factor, millimeters are canceled out and we get the result in inches. And since the conversion factor is equal to 1, multiplying it with the original value won't change its magnitude and will only change its unit.
Based on this, we can conclude that 2.54 millimeters are equal to 0.1 inches.
Remember:
- When converting from millimeters to inches, we use 1 in25.4 mm as a conversion factor.
Practice: millimeters to inches conversion
Try answering the following questions without using our custom conversion calculator. Knowing how to convert manually between millimeters and inches could prove to be useful, so give it a shot. Once you are confident you can convert millimeters to inches, there is no harm then in taking full advantage of the tools available to you.
How to convert 44 millimeters to inches?
We multiply 44 by the factor of 1
We replace the number 1 with the conversion factor for millimeters to inches
We multiply 44 millimeters by the conversion factor. Having millimeters in the denominator allows us to cancel out the undesired units (mm) leaving only inches in the final result.
Answer: There are 1.73228 inches in 44 millimeters
How many inches are in 195 millimeters?
Multiply 195 by the conversion factor. Make sure the unwanted unit (mm) is in the denominator.
This allows us to cancel out the millimeters (mm) and leave the inches (in)
Answer: There are 7.67717 inches in 195 millimeters
inches to millimeters conversion
- 1 in = 25.4 mm
- To convert from inches to millimeters use our inches to mm converter
millimeters conversion
Convert from Millimeters (mm):
- Millimeters to kilometers (mm to km)
1 mm = 11e+6 km = 1e-6 km - Millimeters to meters (mm to m)
1 mm = 11000 m = 0.001 m - Millimeters to centimeters (mm to cm)
1 mm = 110 cm = 0.1 cm - Millimeters to micrometers (mm to μm)
1 mm = 1000 μm - Millimeters to nanometers (mm to nm)
1 mm = 1e+6 nm - Millimeters to nautical miles (mm to nmi)
1 mm = 11.852e+6 nmi = 5.399568035e-7 nmi - Millimeters to miles (mm to mi)
1 mm = 11.609344e+6 mi = 6.213711922e-7 mi - Millimeters to yards (mm to yd)
1 mm = 1914.4 yd = 0.001093613298 yd - Millimeters to feet (mm to ft)
1 mm = 1304.8 ft = 0.003280839895 ft - Millimeters to inches (mm to in)
1 mm = 125.4 in = 0.03937007874 in
Convert to Millimeters (mm):
- Kilometers to millimeters (km to mm)
1 km = 1e+6 mm - Meters to millimeters (m to mm)
1 m = 1000 mm - Centimeters to millimeters (cm to mm)
1 cm = 10 mm - Micrometers to millimeters (μm to mm)
1 μm = 11000 mm = 0.001 mm - Nanometers to millimeters (nm to mm)
1 nm = 11e+6 mm = 1e-6 mm - Nautical miles to millimeters (nmi to mm)
1 nmi = 1.852e+6 mm - Miles to millimeters (mi to mm)
1 mi = 1.609344e+6 mm - Yards to millimeters (yd to mm)
1 yd = 914.4 mm - Feet to millimeters (ft to mm)
1 ft = 304.8 mm - Inches to millimeters (in to mm)
1 in = 25.4 mm
inches conversion
Convert from Inches (in):
- Inches to kilometers (in to km)
1 in = 2.54e-5 km - Inches to meters (in to m)
1 in = 0.0254 m - Inches to centimeters (in to cm)
1 in = 2.54 cm - Inches to millimeters (in to mm)
1 in = 25.4 mm - Inches to micrometers (in to μm)
1 in = 25400 μm - Inches to nanometers (in to nm)
1 in = 2.54e+7 nm - Inches to nautical miles (in to nmi)
1 in = 0.02541852 nmi = 1.371490281e-5 nmi - Inches to miles (in to mi)
1 in = 163360 mi = 1.578282828e-5 mi - Inches to yards (in to yd)
1 in = 136 yd = 0.02777777778 yd - Inches to feet (in to ft)
1 in = 112 ft = 0.08333333333 ft
Convert to Inches (in):
- Kilometers to inches (km to in)
1 km = 12.54e-5 in = 39370.07874 in - Meters to inches (m to in)
1 m = 10.0254 in = 39.37007874 in - Centimeters to inches (cm to in)
1 cm = 12.54 in = 0.3937007874 in - Millimeters to inches (mm to in)
1 mm = 125.4 in = 0.03937007874 in - Micrometers to inches (μm to in)
1 μm = 125400 in = 3.937007874e-5 in - Nanometers to inches (nm to in)
1 nm = 12.54e+7 in = 3.937007874e-8 in - Nautical miles to inches (nmi to in)
1 nmi = 18520.0254 in = 72913.38583 in - Miles to inches (mi to in)
1 mi = 63360 in - Yards to inches (yd to in)
1 yd = 36 in - Feet to inches (ft to in)
1 ft = 12 in