Convert μm to mm

Interactive micrometers to millimeters conversion tool

The μm to mm converter below can be used to quickly and easily convert micrometers to millimeters. Simply enter the number of micrometers you want to convert and the calculator will output the corresponding value in millimeters.

What is the conversion factor between micrometers and millimeters?

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 micrometers and millimeters is 1000, such as:

1 mm = 1000 μm

Following the formula above, we can see that there are 1000 micrometers for every millimeter, and for every micrometer, there are 11000 millimeters (0.001 mm).

To convert from micrometers to millimeters, we turn our formula into a conversion factor that is equal to 1.

1 mm1000 μm = 1000 μm1 mm= 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 micrometer to millimeter, we will use the first fraction: 1 mm1000 μm so that micrometers are canceled out. We then multiply the value in micrometers by this fraction to get the result in millimeters (see example).

Note that μm 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).

Conversion factor = Unit you are converting toUnit you are converting from

You will find below how to use this ratio to convert from μm to mm. Just remember for now that the conversion factor for converting from micrometers to millimeters is:

1 mm1000 μm

Which is bigger, a micrometer or a millimeter?

When it comes to measurements, there can be some confusion over which is bigger, a micrometer or an millimeter. To find out which one is larger, we must first convert one unit to the other and then compare them.

1 μm = 11000 mm = 0.001 mm
0.001 millimeter is smaller than 1 millimeter.
1 micrometer is, therefore, smaller than 1 millimeter.
To be more specific, a millimeter is 1000 times bigger than a micrometer.

micrometers to millimeters conversion table

micrometers	millimeters	micrometers	millimeters
1 μm	0.001 mm	11 μm	0.011 mm
2 μm	0.002 mm	12 μm	0.012 mm
3 μm	0.003 mm	13 μm	0.013 mm
4 μm	0.004 mm	14 μm	0.014 mm
5 μm	0.005 mm	15 μm	0.015 mm
6 μm	0.006 mm	16 μm	0.016 mm
7 μm	0.007 mm	17 μm	0.017 mm
8 μm	0.008 mm	18 μm	0.018 mm
9 μm	0.009 mm	19 μm	0.019 mm
10 μm	0.01 mm	20 μm	0.02 mm

How to convert micrometers to millimeters?

Multiplying any value by 1 will get you the same value back. You can do that one time or multiple times.

For example:

96 x 1 = 96
322 x 1 x 1 x 1 = 322

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 100 micrometers into millimeters we multiply 100 μm by the conversion factor of 1 mm1000 μm

100 μm = 100 μm x 1 = 100 μm x 1 mm1000 μm = 0.1 mm

By replacing the number 1 with the conversion factor, micrometers are canceled out and we get the result in millimeters. 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 100 micrometers are equal to 0.1 millimeters.

Remember:

When converting from micrometers to millimeters, we use 1 mm1000 μm as a conversion factor.

Practice: micrometers to millimeters conversion

Try answering the following questions without using our custom conversion calculator. Knowing how to convert manually between micrometers and millimeters could prove to be useful, so give it a shot. Once you are confident you can convert micrometers to millimeters, there is no harm then in taking full advantage of the tools available to you.

How to convert 55 micrometers to millimeters?

We multiply 55 by the factor of 1

55 μm = 55 μm x 1

We replace the number 1 with the conversion factor for micrometers to millimeters

55 μm = 55 μm x 1 mm1000 μm

We multiply 55 micrometers by the conversion factor. Having micrometers in the denominator allows us to cancel out the undesired units (μm) leaving only millimeters in the final result.

55 μm = 55 μm x 1 mm1000 μm

55 μm = 55 x 11000 mm

55 μm = 0.055 mm

Answer: There are 0.055 millimeters in 55 micrometers

How many millimeters are in 755 micrometers?

Multiply 755 by the conversion factor. Make sure the unwanted unit (μm) is in the denominator.

755 μm = 755 μm x 1 mm1000 μm

This allows us to cancel out the micrometers (μm) and leave the millimeters (mm)

755 μm = 755 μm x 1 mm1000 μm

755 μm = 755 x 11000 mm

755 μm = 0.755 mm

Answer: There are 0.755 millimeters in 755 micrometers

millimeters to micrometers conversion

1 mm = 1000 μm
To convert from millimeters to micrometers use our mm to μm converter

micrometers conversion

Convert from Micrometers (μm):

Micrometers to kilometers (μm to km)
1 μm = 11e+9 km = 1e-9 km
Micrometers to meters (μm to m)
1 μm = 11e+6 m = 1e-6 m
Micrometers to centimeters (μm to cm)
1 μm = 110000 cm = 1e-4 cm
Micrometers to millimeters (μm to mm)
1 μm = 11000 mm = 0.001 mm
Micrometers to nanometers (μm to nm)
1 μm = 1000 nm
Micrometers to nautical miles (μm to nmi)
1 μm = 11.852e+9 nmi = 5.399568035e-10 nmi
Micrometers to miles (μm to mi)
1 μm = 11.609344e+9 mi = 6.213711922e-10 mi
Micrometers to yards (μm to yd)
1 μm = 1914400 yd = 1.093613298e-6 yd
Micrometers to feet (μm to ft)
1 μm = 1304800 ft = 3.280839895e-6 ft
Micrometers to inches (μm to in)
1 μm = 125400 in = 3.937007874e-5 in

Convert to Micrometers (μm):

Kilometers to micrometers (km to μm)
1 km = 1e+9 μm
Meters to micrometers (m to μm)
1 m = 1e+6 μm
Centimeters to micrometers (cm to μm)
1 cm = 10000 μm
Millimeters to micrometers (mm to μm)
1 mm = 1000 μm
Nanometers to micrometers (nm to μm)
1 nm = 11000 μm = 0.001 μm
Nautical miles to micrometers (nmi to μm)
1 nmi = 1.852e+9 μm
Miles to micrometers (mi to μm)
1 mi = 1.609344e+9 μm
Yards to micrometers (yd to μm)
1 yd = 914400 μm
Feet to micrometers (ft to μm)
1 ft = 304800 μm
Inches to micrometers (in to μm)
1 in = 25400 μm

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