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Convert mm to km
Interactive millimeters to kilometers conversion tool
The mm to km converter below can be used to quickly and easily convert millimeters to kilometers. Simply enter the number of millimeters you want to convert and the calculator will output the corresponding value in kilometers.
What is the conversion factor between millimeters and kilometers?
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 kilometers is 1e+6, such as:
Following the formula above, we can see that there are 1e+6 millimeters for every kilometer, and for every millimeter, there are 11e+6 kilometers (1e-6 km).
To convert from millimeters to kilometers, 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 kilometer, we will use the first fraction: 1 km1e+6 mm so that millimeters are canceled out. We then multiply the value in millimeters by this fraction to get the result in kilometers (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 km. Just remember for now that the conversion factor for converting from millimeters to kilometers is:
Which is bigger, a millimeter or a kilometer?
When it comes to measurements, there can be some confusion over which is bigger, a millimeter or an kilometer. To find out which one is larger, we must first convert one unit to the other and then compare them.
- 1 mm = 11e+6 km = 1e-6 km
- 1e-6 kilometer is smaller than 1 kilometer.
- 1 millimeter is, therefore, smaller than 1 kilometer.
- To be more specific, a kilometer is 1e+6 times bigger than a millimeter.
millimeters to kilometers conversion table
| millimeters | kilometers | millimeters | kilometers |
|---|---|---|---|
| 1 mm | 1e-6 km | 11 mm | 1.1e-5 km |
| 2 mm | 2e-6 km | 12 mm | 1.2e-5 km |
| 3 mm | 3e-6 km | 13 mm | 1.3e-5 km |
| 4 mm | 4e-6 km | 14 mm | 1.4e-5 km |
| 5 mm | 5e-6 km | 15 mm | 1.5e-5 km |
| 6 mm | 6e-6 km | 16 mm | 1.6e-5 km |
| 7 mm | 7e-6 km | 17 mm | 1.7e-5 km |
| 8 mm | 8e-6 km | 18 mm | 1.8e-5 km |
| 9 mm | 9e-6 km | 19 mm | 1.9e-5 km |
| 10 mm | 1e-5 km | 20 mm | 2e-5 km |
How to convert millimeters to kilometers?
Multiplying any value by 1 will get you the same value back. You can do that one time or multiple times.
For example:
- 95 x 1 = 95
- 697 x 1 x 1 x 1 = 697
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 100000 millimeters into kilometers we multiply 100000 mm by the conversion factor of 1 km1e+6 mm
By replacing the number 1 with the conversion factor, millimeters are canceled out and we get the result in kilometers. 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 100000 millimeters are equal to 0.1 kilometers.
Remember:
- When converting from millimeters to kilometers, we use 1 km1e+6 mm as a conversion factor.
Practice: millimeters to kilometers conversion
Try answering the following questions without using our custom conversion calculator. Knowing how to convert manually between millimeters and kilometers could prove to be useful, so give it a shot. Once you are confident you can convert millimeters to kilometers, there is no harm then in taking full advantage of the tools available to you.
How to convert 25 millimeters to kilometers?
We multiply 25 by the factor of 1
We replace the number 1 with the conversion factor for millimeters to kilometers
We multiply 25 millimeters by the conversion factor. Having millimeters in the denominator allows us to cancel out the undesired units (mm) leaving only kilometers in the final result.
Answer: There are 2.5e-5 kilometers in 25 millimeters
How many kilometers are in 490 millimeters?
Multiply 490 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 kilometers (km)
Answer: There are 0.00049 kilometers in 490 millimeters
kilometers to millimeters conversion
- 1 km = 1e+6 mm
- To convert from kilometers to millimeters use our km 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
kilometers conversion
Convert from Kilometers (km):
- Kilometers to meters (km to m)
1 km = 1000 m - Kilometers to centimeters (km to cm)
1 km = 100000 cm - Kilometers to millimeters (km to mm)
1 km = 1e+6 mm - Kilometers to micrometers (km to μm)
1 km = 1e+9 μm - Kilometers to nanometers (km to nm)
1 km = 1e+12 nm - Kilometers to nautical miles (km to nmi)
1 km = 11.852 nmi = 0.5399568035 nmi - Kilometers to miles (km to mi)
1 km = 11.609344 mi = 0.6213711922 mi - Kilometers to yards (km to yd)
1 km = 10.0009144 yd = 1093.613298 yd - Kilometers to feet (km to ft)
1 km = 10.0003048 ft = 3280.839895 ft - Kilometers to inches (km to in)
1 km = 12.54e-5 in = 39370.07874 in
Convert to Kilometers (km):
- Meters to kilometers (m to km)
1 m = 11000 km = 0.001 km - Centimeters to kilometers (cm to km)
1 cm = 1100000 km = 1e-5 km - Millimeters to kilometers (mm to km)
1 mm = 11e+6 km = 1e-6 km - Micrometers to kilometers (μm to km)
1 μm = 11e+9 km = 1e-9 km - Nanometers to kilometers (nm to km)
1 nm = 11e+12 km = 1e-12 km - Nautical miles to kilometers (nmi to km)
1 nmi = 1.852 km - Miles to kilometers (mi to km)
1 mi = 1.609344 km - Yards to kilometers (yd to km)
1 yd = 0.0009144 km - Feet to kilometers (ft to km)
1 ft = 0.0003048 km - Inches to kilometers (in to km)
1 in = 2.54e-5 km